# Tenkey Tape: Adding Machine — 10-Key Calculator with Tape

> 10-Key Calculator with Tape (iPhone/iPad app by Chi Thang Duong.)

- Source: https://appshunter.io/ios/app/tenkey-tape-adding-machine/id6815832565 (this page in markdown: same URL + `.md`)
- Developer: [Chi Thang Duong](https://appshunter.io/developer/1865729903)
- Category: Finance, Productivity
- Price: $1.99
- Age rating: 4+
- Requires: iOS 18.0 · 1 MB
- Languages: American English
- Released: 2026-09-30
- Data updated: 2026-10-07
- User reviews in markdown: https://appshunter.io/ios/app/tenkey-tape-adding-machine/id6815832565/reviews.md

## What is Tenkey Tape?

Tenkey Tape is a 10-key adding machine that keeps every calculation on an editable paper tape. Add up a column of figures, then change any line — every total below it recalculates instantly.

THE TAPE
• Every entry stays on screen with its operator, its running total and your own comment
• Tap any line to correct a figure, switch + to −, or label what it was for
• Insert a figure you missed into the middle of a tape; nothing gets retyped
• Headings break a long tape into sections you can read back a month later

BUILT FOR BOOKKEEPING
• Exact decimal arithmetic — no floating-point cent errors
• Two tax rates, with +Tax to add tax and −Tax to extract the net from a gross amount
• Subtotals that keep going and totals that start a fresh calculation
• Memory keys, percentages and a Use Result key to carry a total forward
• Decimal places, rounding (5/4, banker's, up, down) and round-each-step to match a printed tape
• Thousands separator, Indian numbering and line numbers

KEEP IT AND SEND IT
• Save tapes by name, and duplicate one as a template for next month
• iCloud sync across iPhone, iPad and Mac
• Share as text, export PDF or CSV, or print the tape
• Full keypad on iPad, and a hardware numeric keypad works on iPad and Mac

No ads. No subscription. No account. Your tapes stay on your devices.

## Chart rankings

- #103 in Top Paid · Finance (US App Store)


## Version history (last 1 release)

### 1.0 — 2026-09-30

No release notes.

## More apps by Chi Thang Duong

- [VaudNatu: Swiss Citizenship](https://appshunter.io/ios/app/vaudnatu-swiss-citizenship/id6757275129)
- [Shortcuts Debugger](https://appshunter.io/ios/app/shortcuts-debugger/id6761784989)
- [Việt Lịch](https://appshunter.io/ios/app/viet-lich/id6762529569)
- [Hex Optimizer: City Builder](https://appshunter.io/ios/app/hex-optimizer-city-builder/id6763935229)
- [ZurichNatu](https://appshunter.io/ios/app/zurichnatu/id6783072878)

All apps by Chi Thang Duong: https://appshunter.io/developer/1865729903

## Related topics

[adding machines](https://appshunter.io/ios/topics/adding-machines)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-07.*