CalBook: Tape Calculator

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.

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