# CalcTape for Android – Manual & Guide

> Manual for CalcTape for Android: operation, calculations, comments, custom buttons and Pro features.

- Language: English
- This page as HTML: https://www.calctape.com/en/manual-android
- Updated: 2026-09-04

CalcTape for Android is the mobile version of the CalcTape calculator. Instead of showing only a single intermediate result like a conventional calculator, CalcTape works like a paper tape with a notepad function: you write your calculation line by line, can add a comment to every value, and edit anything at any time. Everything is recalculated instantly.

> Calculate, Comment, Correct: on your phone or tablet. Your documents stay local on your device.

![CalcTape on your Android phone](https://www.calctape.com/img/manuals/android-main-en-light.webp)

## 1. The Concept: How CalcTape Works

CalcTape differs from a conventional calculator in four ways:

### Line-by-Line Calculation

Each line contains an operator and a value, e.g. `+ 1,350.00`. CalcTape accumulates the lines continuously, like a receipt.

### Automatic Subtotals

When you close a block (using the `= ↵` key), CalcTape automatically draws a separator line and writes the running subtotal below it:

```
+ 3,230.00 Salary
- 1,350.00 Rent
-   780.00 Groceries
----------------
+ 1,100.00 Available
```

### Comments Right Next to the Numbers

You can write any text after a value (in the example above "Salary", "Rent" …). CalcTape ignores the text when calculating but displays it alongside the numbers, so every calculation stays easy to follow.

### Edit Anything at Any Time

Tap any value in any line and change it. The entire calculation is recalculated instantly. That is what makes CalcTape so flexible.

### Multiple Calculations Side by Side

- Without a blank line between two blocks you get a convenient subtotal.
- With a blank line you start a completely new, independent calculation in the same document.

## 2. Interface Overview

The app is divided into the following areas:

| Area | Position | Function |
|---|---|---|
| Toolbar | very top | Menu icon ☰, document title, Upgrade button (Free/Eval) or Pro indicator ◊, light/dark toggle and theme button (Modern design), overflow menu ⋮ |
| Tape (editor) | center | Input area for your calculations |
| Smart Insert button | right edge of the tape | Inserts variables and example templates (can be hidden in Settings) |
| Result bar | above the keyboard | Running result of the current calculation, copy button, keyboard selector, resize handle |
| Keyboard | bottom | The CalcTape keypad with the K1, K2 and NAV segments |
| Document drawer | swipes in from the left | Documents list, import, backup/restore, settings, info |

![The toolbar: menu, document title, overflow menu](https://www.calctape.com/img/manuals/android-toolbar-top-en-light.webp)

The two icons between the document title and the edition marker belong to the Modern design and are missing in Classic. The **sun/moon icon** switches between light and dark; it always shows the state a tap would produce and starts from what you actually see, so from **System default** it goes to the opposite of the current brightness. The **theme button** shows the palette of the current theme and opens the palette tiles; it can be switched off in **Settings → Appearance** (a Pro feature), while the sun/moon icon stays either way.

### The Result Bar

The result bar sits directly above the keyboard and always shows the current result of the calculation at the cursor. Tap the copy icon to put just that number on the clipboard, or long-press it for the grand total of the whole document; both work in every edition. The bar also holds the keyboard selector (K1 / K2 / NAV) and the **ABC** key that switches to the system keyboard.

Three gestures work anywhere along the bar:

| Gesture | Effect |
|---|---|
| Quick swipe down | Hides the keyboard and gives the tape the whole screen |
| Quick swipe up | Brings the last keyboard back |
| Slow vertical drag | Resizes the keyboard live (portrait; in landscape use the resize handle) |
| Horizontal swipe | Switches between the CalcTape keypad and the system keyboard |

The quick swipe and the slow drag differ in time, not in distance: hold for a moment before you move and you are resizing.

![The result bar with the running result and the keyboard selector](https://www.calctape.com/img/manuals/android-summary-bar-en-light.webp)

### Adapting to Screen Size

- Portrait: tape on top, keyboard at the bottom; the keyboard takes 20 % to 80 % of the screen (drag the result bar to adjust).
- Landscape and tablets: one of three arrangements in **Settings → Keyboard → Landscape Layouts** — **Keyboard Bottom**, **Keyboard Right**, or **Document-Editor-Keyboard**, which puts the document list, the editor and the keyboard side by side.

## 3. The Editor: Writing Calculations

The editor is the heart of the app. Type with the CalcTape keypad or switch to the system keyboard with the **ABC** key for comments and names; both work equally well. Totals are displayed in bold, so the result of every calculation is easy to spot at a glance.

![A calculation, line by line: values, comments, subtotals](https://www.calctape.com/img/manuals/android-tape-en-light.webp)

### Line Structure

```
<Operator> <Number> <optional comment text>
```

Example: `+ 1,234.50 income March`

- Every calculation must start with a number or a sign (`+` / `−`).
- Available operators are addition, subtraction, multiplication, division, and exponentiation.
- The decimal and thousands separators follow your device language. Settings also offer Indian digit grouping (lakh/crore, e.g. `10,00,000.00`).

### Percentage Calculations

A percentage value is placed after a number, e.g. `- 40.00%`. It refers to the current running subtotal:

```
+ 910.50 Available budget
- 40.00% | -364.20 Reserves
----------------
+ 546.30 Available
```

CalcTape automatically displays the amount calculated from the percentage right after it (in the example `| -364.20`).

### Comments

Everything after the number is treated as a comment and does not affect the calculation. Lines that do not start with a number or operator are free text: use them for headings and notes.

### Variables (Named Values)

CalcTape lets you name values and reuse them later. Variable names start with a letter and contain letters, digits, and underscores:

```
vat = 19
+ 1,000.00 Net
+ vat% | 190.00 VAT
```

In a sum line, the name can also go to the right of `=` and takes on the result of that line (`+ 1,880.00 = budget`). The Free edition allows up to 2 variable definitions per document; Pro has no limit.

### Smart Insert

The small floating button on the right edge of the tape opens a panel with two sections. It can be hidden in **Settings → Tape → Show quick insert button**, and it can be moved: long-press it and drag. A short vibration confirms that it has come loose, and the position is remembered as a proportion of the screen, so it survives rotation.

![The Smart Insert panel: ready-made calculations and named values](https://www.calctape.com/img/manuals/android-smart-insert-panel-en-light.webp)

**Info** lists ready-made calculations that come with CalcTape in your language — a shopping list and a price calculation. Tapping one puts it at the top of the current document, above what is already there.

**Named Values** lists every variable defined in this document, name on the left and current value on the right. Tap the name to insert it at the caret, tap the value to jump to the line where the variable is defined, and use **New variable** at the top of the section to start a fresh definition. In the Free edition the first two variables behave normally; from the third one on, the rows lead to the upgrade dialog.

![The "Getting started" example template](https://www.calctape.com/img/manuals/android-getting-started-en-light.webp)

### Editing, Inserting, Deleting

- Tap anywhere, place the cursor, and overwrite the value; CalcTape recalculates immediately.
- Long-press a number to select it; triple-tap selects the whole line.
- The backspace key is block-aware: on a divider or sum line it dissolves the entire block, inside a number it deletes one digit at a time.

## 4. The Keyboards: All Keys Explained

The keypad has three segments, and you decide which layout sits in each of them. Each segment remembers the layout you last put in it. Since version 7.1 every built-in layout is available in every edition.

| Segment | Default layout | Typical use |
|---|---|---|
| K1 | Memory keys [4x6] | The everyday keypad: digits, operators, memory |
| K2 | Function keys [4x5] | Powers, roots, percent, sign change |
| NAV | Text navigation [5x4] | Moving the caret, selecting, cut/copy/paste |

Three ways lead to the same place: **swipe** left or right across the keypad itself, **tap the segment button** (K1, K2 or Nav) in the result bar for a short list naming the layout in each segment, or **long-press the same button** to open the layout picker for the active segment — which works in every edition from version 7.1. The same picker sits in **Settings → Keyboard** as three separate entries, one per segment.

![The segment list behind the K1 button, naming the layout in each segment](https://www.calctape.com/img/manuals/android-keyboard-selector-en-light.webp)

Besides the three defaults the picker offers Standard [4x5], Standard [4x6], India [4x6] (with `00` and `000` in place of x² and √, for amounts in lakh and crore), left-handed variants of the Standard and Memory layouts, and Text navigation in [4x3] and [5x3]. Layouts are sorted by name and carry a prefix: **[SYS]** for the built-in ones, **[USR]** for a layout you saved yourself.

### K1: the Calculator Keypad

![K1: numbers, operators, and memory keys](https://www.calctape.com/img/manuals/android-keyboard-k1-en-light.webp)

Numbers `0`–`9`, decimal separator, the four basic operators, `%`, `= ↵` (close block, draw subtotal), `AC` (clear document, undoable), `⌫`, and the sign key `+/-`.

### K2: the Function Keypad

![K2: powers, roots, and editing functions](https://www.calctape.com/img/manuals/android-keyboard-k2-en-light.webp)

Powers (`x²`, `x³`, `xⁿ`), root (`√`), reciprocal (`1/x`), Undo/Redo, and Cut / Copy / Paste.

### NAV: Text and Navigation

![NAV: cursor keys, selection, clipboard](https://www.calctape.com/img/manuals/android-keyboard-nav-en-light.webp)

Cursor keys, line start/end, selection, and clipboard operations for editing without leaving the keypad.

### Memory Keys

The four keys come with the **Memory keys** layouts; in the default setup they sit in K1, spread over the top two rows next to `AC` and the backspace key.

| Key | Meaning |
|---|---|
| `MR` | Memory Recall: insert the stored value at the cursor |
| `M+` | Add the current value to memory |
| `M−` | Subtract the current value from memory |
| `MC` | Clear memory |

Each of the three keys carries a small second line, and they show two different things: `M+` and `M−` name the **value they would apply** - the one taken from the line the cursor sits in - while `MR` shows **what is in memory**. A key with nothing to offer stays dimmed, so on a fresh document `M+` and `M−` are live as soon as the cursor sits on a value, and `MR` lights up once you have put something into memory. Tap and hold a key for its full value. The memory persists during the session and is reset when you close the document.

By default `M+` and `M−` take the value of the line the cursor sits in; on a line without a value of its own, such as the fresh line below a finished block, they take the block total. **Settings → Calculation → M+/M- uses result** makes them use the block result on every line.

### User Keys (+TAX)

The keypad includes customizable user keys, by default `+TAX` / `−TAX` (rate preset for your country), `+TAX2` / `−TAX2`, and tip keys. They insert a pre-configured calculation step and can be freely reconfigured (next section).

> Tip: Accidentally pressed `AC`? Use Undo (on the K2 keypad) to restore the previous content.

## 5. Customizing Keys (Pro)

The Pro edition lets you customize every key on every keyboard.

### Entering Edit Mode

Open the menu (⋮ at the top right) → **Edit keyboard**. The tape dims and a banner appears: "Tap a key to edit". Tap any key.

![Edit mode: the tape dims, every key becomes editable](https://www.calctape.com/img/manuals/android-edit-keyboard-en-light.webp)

### Fields in the Dialog

![The key editor: caption, insertion text, color, size](https://www.calctape.com/img/manuals/android-custom-key-dialog-en-light.webp)

The editor has three tabs:

| Tab | Contents |
|---|---|
| System | Rebind the key to a different built-in action |
| User | Caption, insertion text and color of a user button, e.g. `+19%` |
| Layout | Key size: single, double-width, double-height, or 2×2 |

User buttons can also be created, deleted, and assigned to any key. In the Free edition the editor opens for user buttons only, and there only the **User** tab is free: **System** and **Layout** carry the Pro diamond ◊ and lead to the upgrade dialog. Creating and deleting user buttons is Pro as well.

## 6. The Menu

The overflow menu (⋮ at the top right) contains the document commands:

![The overflow menu with Save, Print, and Share](https://www.calctape.com/img/manuals/android-menu-popup-en-light.webp)

| Entry | Function |
|---|---|
| Upgrade to Pro | Opens the purchase dialog; the entry carries the price, so you see it before you tap |
| Restore purchases | Asks Google Play for an existing purchase (section 12) |
| Try Pro for 10 days | Starts the trial; disappears once it has been used |
| Share ◊ | Share as text, .calc file, or HTML (Pro, section 8) |
| Print ◊ | Android print dialog: printer or PDF (Pro) |
| Copy calculation | The whole tape as plain text on the clipboard |
| Copy calculation (HTML) ◊ | The tape as formatted HTML, for pasting into a mail or a document (Pro) |
| Copy grand total | Only the final total |
| Edit keyboard | Keyboard edit mode (section 5) |
| What's New | The release notes of this version; an unread entry is marked with a bullet. After an update a small speech bubble points here once; there is no dialog that opens by itself. |

The first three entries appear according to your edition and vanish once you own Pro. The diamond ◊ marks what needs Pro; plain copying of the calculation and of the grand total is free in every edition.

The main menu (☰ at the top left) opens the document drawer (section 7).

## 7. Documents

CalcTape stores each tape as a `.calc` document. The Free edition works with a single document called `ScratchPad`; Pro manages an unlimited number of documents.

![The document drawer: documents, import, backup, settings](https://www.calctape.com/img/manuals/android-documents-en-light.webp)

- **Open the drawer**: swipe from the left edge or tap ☰.
- **Create (Pro)**: tap the + button, enter a name. The document opens immediately and is saved automatically.
- **Context menu**: long-press a document for Open, Rename, Duplicate, Export (Pro), and Delete.
- **Auto-save**: every change is saved automatically; there is no save button.
- **Sort order**: by date or name, ascending or descending (Settings → Document list).

## 8. Sharing, Printing, Exporting

In Pro, the menu (⋮) offers a **Share** entry. Pick what to include:

- **Text only**: the tape content as plain text.
- **CalcTape document**: the `.calc` file itself, openable by other CalcTape users on any platform.
- **HTML**: a styled page that any browser can render.

You can pick more than one; CalcTape then opens the system share sheet. With an email client and "Text only", the calculation appears in the message body; additional formats become attachments.

**Print** opens Android's standard print dialog, so you can print or save as PDF. Layout and formatting follow the on-screen presentation.

Temporary export files live in app-private storage under `…/files/export_tmp/` and are cleaned up when CalcTape starts. They exist only as the source for the `content://` link the receiving app reads, so they never show up in a file manager, and uninstalling CalcTape removes them.

## 9. Saving and Backup

### Automatic Saving

Your documents are saved continuously and automatically in the app's private storage. Closing the app or switching documents always preserves the latest state.

Every save writes a temporary file first and only then renames it over the old one, so an interrupted save cannot leave you with an empty or half-written document, and a save that fails now says so instead of failing quietly. If a `.tmp` file ever survives next to your documents, it holds the newest version of that calculation: the error message names its path, and renaming it back to `.calc` recovers it.

### Backup and Restore (Pro)

In the document drawer, expand **Backup / Restore**. Both directions open a dialog with the same four checkboxes, all ticked to begin with:

![The backup dialog with its four checkboxes](https://www.calctape.com/img/manuals/android-backup-dialog-en-light.webp)

| Checkbox | Contents |
|---|---|
| Worksheet | The default sheet, listed on its own because it is the one document every edition has |
| All calculations | Every other `.calc` document. A chevron expands the row into one checkbox per document, so you can pick individual ones; the parent then shows a partial tick. |
| Keyboard layouts and buttons | Custom layouts (`.phone`), custom user buttons (`.btn`), plus the active layout of each segment and the segment you last had in front |
| Settings | The app settings, the formats last chosen in the share dialog, and the landscape arrangement |

- **Backup** creates a single ZIP archive (`CalcTape-YYYYMMDDHHMM.zip`) in a location you choose, so the archives of one day sort in the order you made them.
- **Restore** offers only the boxes the archive actually holds something for. Documents are put back alongside the existing ones; settings replace what is currently set, and the app restarts to show them.

A backup is meant to travel between phones, so three things are deliberately left out of a restore and keep their local values: the Pro licence, the device identifier it is derived from, and the state of the trial. Restoring a backup from another device therefore never affects your edition. Left out of the archive too is everything that only describes what has already happened on this device — the counters behind the review prompt, the feature hints and the trial offer.

> Create a backup before switching phones, before a major Android upgrade, and as a regular safeguard.

## 10. Settings

Open **☰ → Settings**. The groups follow the order on screen:

![The settings screen](https://www.calctape.com/img/manuals/android-settings-en-light.webp)

| Group | Contains |
|---|---|
| Appearance | Design (Classic or Modern), Themes, Light/dark mode, theme button in the title bar, hide the edition marker (section 11) |
| Tape | Font size, tape lines and line color (greyed out while the lines are off), quick insert button, spell check |
| Calculation | Decimals, rounding, thousands separator, Indian digit grouping, indentation, M+/M- uses result, automatic number detection when pasting |
| Keyboard | Three entries assigning a layout to K1, K2 and NAV; landscape layouts (Keyboard Bottom, Keyboard Right, Document-Editor-Keyboard); keyboard size (portrait/landscape), keyboard font size, modern or classic key style, vibration and keypress sound (both off by default) |
| Documents | Sort order, storage location (private storage or Documents folder, for upgrades from CalcTape 6.x) |
| General | Override the system language (17 languages) |

### Rounding

Four modes decide how the configured number of decimals is applied:

| Mode | Effect |
|---|---|
| No rounding | Values keep their natural precision. |
| Round final sums only | Intermediate results stay unrounded, only the closing total of a block is rounded. |
| Round results | Every displayed total is rounded. |
| Round all | Operands are rounded too, so the visible numbers add up exactly to the visible total. |

## 11. Design, Themes and Languages

Since version 7.1 the look is described by three settings instead of one:

- **Design** decides which world you are in. **Classic (like version 7.0)** is the appearance of CalcTape 7.0, unchanged. **Modern** brings the colour palettes, the tile picker and the theme button in the title bar.
- **Themes** picks the theme within that design.
- **Light/dark mode** picks brightness: Light, Dark or System default.

Existing installations stay on **Classic** when they update, so nothing changes underfoot. New installations start in **Modern**. If you updated and would like to see the new design, CalcTape offers it once, at a quiet moment, and a single tap takes you back to the familiar look at any time.

### The themes of the Classic design

| Theme | Look |
|---|---|
| Standard | The day/night theme of CalcTape 7.0; brightness follows the Light/dark mode setting. |
| Classic (Light) | The traditional paper-tape look, cream background with brown highlights. |
| Classic (Dark) | The same classic look on a dark background. |

The two classic themes bring their own brightness, so the Light/dark mode setting has no effect while one of them is active.

![Dark mode: same tape, night colors](https://www.calctape.com/img/manuals/android-main-en-dark.webp)

### The palettes of the Modern design

Seven palettes are bundled, each with a matching light and dark mode. All of them are free, in every edition.

| Palette | Character |
|---|---|
| Crisp Azure | Clean neutral surfaces, azure strictly as the accent. The default. |
| Classic Copper | The CalcTape corporate look, warm paper and copper. |
| Vivid Indigo | A strong indigo accent on cool surfaces. |
| Subtle Slate | Quiet blue-grey, little contrast between the surfaces. |
| Ledger Green | Ledger paper with green accounting accents. |
| Sunlit Amber | Warm amber tones. |
| High Contrast | Built for bright light and washed-out panels: stronger separators, heavier type, borders instead of subtle brightness steps. |

Pick a palette in **Settings → Appearance → Themes**, where every entry shows a miniature of the app in that palette. With **Theme button in the title bar** switched on, the toolbar shows the palette of the current theme; tapping it opens the same tiles and applies your choice immediately - a tap on a tile takes effect at once, there is no OK to confirm.

![The palette tiles from the title bar, the active palette ringed](https://www.calctape.com/img/manuals/android-theme-popup-en-light.webp)

The row **‹ Classic (like version 7.0)** at the top of that panel is the way back to the previous design, kept above the palettes so it stays in view.

### Languages

CalcTape is fully translated into 17 languages: English, German, French, Spanish, Italian, Portuguese (Portugal), Portuguese (Brazil), Russian, Swedish, Turkish, Ukrainian, Indonesian, Bengali, Hindi, Korean, Japanese and Chinese (simplified). The language follows the system by default and can be overridden in **Settings → General → Language**; on Android 13 and later the choice is stored as a per-app language.

## 12. Editions: Free, Eval, Pro

| Feature | Free | Eval | Pro |
|---|---|---|---|
| Tape calculator, memory keys, all built-in keyboards | ✓ | ✓ | ✓ |
| M+/M- uses result | ✓ | ✓ | ✓ |
| Variables | up to 2 | unlimited | unlimited |
| All designs, themes and palettes | ✓ | ✓ | ✓ |
| Copy calculation and grand total | ✓ | ✓ | ✓ |
| Edit the four user-button slots | ✓ | ✓ | ✓ |
| Reassign system keys, resize keys, create new buttons | - | ✓ | ✓ |
| Multiple documents, import/export | - | ✓ | ✓ |
| Share, print, copy as HTML | - | ✓ | ✓ |
| Backup and restore | - | ✓ | ✓ |
| Automatic number detection when pasting | - | ✓ | ✓ |
| Hide the theme button and the edition marker | - | ✓ | ✓ |

**Eval** is a one-time trial of the full Pro edition, lasting **10 days**. Every surface that offers it starts the trial with a single tap and then confirms the exact end date: the entry **Try Pro for 10 days** in the overflow menu, the upgrade screen, the release notes, the offer that appears at a quiet moment in the Free edition, and the dialog you get when you reach for a Pro feature. In that last case the action you were about to take is carried out as soon as the trial runs. Afterwards the app reverts to Free; documents you created remain readable but become read-only until you upgrade.

**Upgrading**: tap **[ UPGRADE ]** in the toolbar to open the Google Play purchase dialog.

**Pro is bound to your Google account**, not to the device. CalcTape asks Google Play on every start and whenever you return to the app; if it finds a purchase this device does not know about yet, Pro unlocks silently. Moving to a new phone with the same account therefore needs nothing from you. The check never takes an entitlement away: being offline looks the same as owning nothing, so an unanswered query leaves your Pro edition alone.

### When a purchase does not complete

Two answers from Google Play do not unlock Pro, and both say so in a dialog. **Payment still pending**: some payment methods confirm later, Google Play completes the purchase on its own, and Pro unlocks the next time you open the app — nothing is required from you. **The purchase could not be verified**: CalcTape checks the signature Google Play returns and refuses a purchase that fails it; if you were charged anyway, write to Support with your payment confirmation.

### Pro in Ukraine

While the device is in Ukraine, every Pro feature is available without a purchase — a small gesture on our part. CalcTape recognises the situation from a Ukrainian SIM card, from the mobile network the device is registered in, or, when no network can be determined, from the time zone set on the device. No permission is needed and no location is stored. The title bar then carries the Ukrainian flag in place of the edition marker, and a short note appears once. The state is worked out afresh at every app start, so it ends by itself when the conditions no longer hold.

## 13. Troubleshooting & Limits

| Symptom | Cause / Remedy |
|---|---|
| "No email client installed" when tapping Support | No app handles `mailto:`. Install or enable a mail app and try again. |
| "Editing this document requires the Pro version" | The document was created with Pro and is opened read-only in Free. Upgrade to edit. |
| Pro reverted to Free unexpectedly | Open CalcTape once with internet access. Since 7.1 it asks Google Play on every start and unlocks Pro again by itself, which also covers a new phone. If it stays Free, check that the device's Play Store account is the one that bought Pro. If the title bar showed the Ukrainian flag before, the Pro features came from the solidarity unlock (section 12) and it ends when the device leaves the country. |
| "Your payment is still pending" | A payment method that confirms later. Google Play finishes the purchase on its own and Pro unlocks the next time you open CalcTape. Nothing to do, and nothing to buy a second time. |
| "The purchase could not be verified" | The signature Google Play returned with the purchase did not match. If Google Play has charged you, write to Support with your payment confirmation. |
| A `.tmp` file next to the documents | A save was interrupted at its last step. That file holds the newest version of the calculation; the error message names its path, renaming it back to `.calc` recovers it. |
| Empty user-button slots after a fresh install | Force-stop CalcTape and start it again (one-time initialization race). |

There is no in-document search; for very long tapes, scroll or export the text. If a line contains an error, the affected result shows an error marker and the description appears when the cursor is on the line.

## 14. Privacy

CalcTape stores your documents and settings exclusively locally on your device, in app-private storage that other apps cannot read:

| Location | Contents |
|---|---|
| `…/files/` | All `.calc` documents and the ScratchPad |
| `…/files/app-settings/keyboards/` | Custom keyboard layouts |
| `…/files/app-settings/user-buttons/` | Custom user buttons |
| `…/files/export_tmp/` | Temporary export files (cleaned up at app start) |
| `…/shared_prefs/` | The settings |

Uninstalling CalcTape removes all of it; the backup in section 9 gives you a portable copy. Nothing analytic is collected: no telemetry and nothing about your calculations. The Google Play billing client checks the Pro license against your Google account; that is a Google-side mechanism and does not transmit document content.

The About screen lists the version of the shared calculation core and, under **Open source licenses**, the licence texts of every third-party component the app ships.

When you contact Support, CalcTape pre-fills app version, Android version, device model, and active keyboard app. All values are visible in the email composer and can be edited or removed before sending.

## 15. CalcTape for Other Platforms

CalcTape is also available for:

- Windows
- macOS
- iOS / iPhone
- CalcTape Web (in the browser, no installation)
- CalcTape for Business (Enterprise)

`.calc` files are portable: documents exported from Android can be opened and edited in every other CalcTape app, and vice versa. You can find all apps at calctape.com.