# Twin Calc: Two Calculators — Split screen, side by side

> Split screen, side by side (iPhone/iPad app by Hiroki Sugiyama.)

- Source: https://appshunter.io/ios/app/twin-calc-two-calculators/id6807615879 (this page in markdown: same URL + `.md`)
- Developer: [Hiroki Sugiyama](https://appshunter.io/developer/6778858327)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 45 MB
- Languages: American English, Japanese
- Released: 2026-09-04
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/twin-calc-two-calculators/id6807615879/reviews.md

## What is Twin Calc?

Twin Calc puts two independent calculators on one screen — a simple calculator app for anyone who has ever wished they had two.

Compare two estimates. Split a bill two different ways. Convert on one side while you total on the other. Check last year's numbers against this year's. Open Twin Calc and calculators A and B are already there — no onboarding, no sign-up.

Features
- Calculator A and B stacked vertically (or side by side in landscape), each fully independent
- Works just like the built-in iPhone calculator: + − × ÷, %, ±, backspace, and thousands separators
- An expression line shows what you are calculating, so you never lose track
- Drag the divider to resize the two calculators; double-tap to reset to half and half
- Long-press a result to copy it; swipe left to delete one character
- Haptic feedback (can be turned off)
- History (tape) keeps your results automatically — tap to copy, or send a result back to A or B
- Light and dark themes that follow your system setting
- Both calculators and the split ratio are restored exactly as you left them

Free
- Two calculators, history, and reuse of your 3 most recent results
- No ads

PRO (one-time purchase)
- Never retype a result again: send A's answer straight to B, or swap A and B in one tap
- Bring back any past result from history
- 3 extra themes: Midnight, Paper, and Mono

PRO is a single one-time purchase. No subscription, no extra fees.

Everything you calculate stays on your device and is never sent to a server.

For iPhone (portrait and landscape).

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| PRO | $3.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-09-04

No release notes.

## More apps by Hiroki Sugiyama

- [FormSync](https://appshunter.io/ios/app/formsync/id6779924474)
- [Privexa: EXIF & GPS Remover](https://appshunter.io/ios/app/privexa-exif-and-gps-remover/id6782251439)
- [Rewindo - Reverse Video Maker](https://appshunter.io/ios/app/rewindo-reverse-video-maker/id6807332854)

All apps by Hiroki Sugiyama: https://appshunter.io/developer/6778858327

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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 2026-09-08.*