CalBook: Tape Calculator
Adding Machine for Receipts
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
CalBook is a paper tape calculator for the numbers you need to keep. Every entry stays on the tape, so you can see exactly how you got to the total, go back, and fix a typo without punching everything in again.
Built for adding up receipts, invoices, expenses and anything else that used to live on an adding machine roll.
AN EDITABLE TAPE
- Every line stays visible with its result
- Tap any line to change it; the total updates instantly
- Carry a line's result forward into a new calculation
- Duplicate, delete, or copy any line or its result
A SHEET FOR EVERY JOB
- Keep separate sheets for each client, project or month
- Rename sheets and pick up right where you left off
- Share a sheet as text, an image, or a view-only link
A CALCULATOR THAT FEELS RIGHT
- Big, clear keypad with optional sound and haptics
- Percent key up front; memory, powers, roots and trig in landscape
- Nine keypad skins, starting with a Liquid Glass default
CALBOOK PRO
A single one-time purchase. No subscription.
- Comments on any line: note the store, the client, or the invoice number
- Row highlights to flag the lines that matter
- Export to PDF for printing or filing, or CSV for Numbers, Excel and Google Sheets
- Unlimited sheets
- Editable share links, so others can keep working on a sheet
- Seven Pro themes that restyle the keypad and your sheet list, plus every accent color
- Advanced number formatting, including South Asian (lakh, crore) grouping, custom separators, symbols and decimal places
PRIVATE BY DESIGN
Your sheets stay on your iPhone. No accounts, no ads, no analytics, no tracking.
Questions or ideas? Tap Send feedback in Settings. We read everything.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
CalBook now lives on your home screen.
- New: a calculator widget. Add it from the widget gallery and add up receipts without opening the app. It wears the skin and accent you chose in Settings.
- Every total you press = on lands on a Widget sheet in CalBook, so nothing you type on the home screen is lost.
- Tap the widget's display to continue the same calculation in the app.
The developer, Derick Tsang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Derick Tsang
- Size
- 7.5 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Calcoo Pro $2.99
- Copyright
- © 2026 Derick Tsang