# Oalculator — Retro typewriter calculator

> Retro typewriter calculator (iPhone/iPad app by 汝衡 冯.)

- Source: https://appshunter.io/ios/app/oalculator/id6762623476 (this page in markdown: same URL + `.md`)
- Developer: [汝衡 冯](https://appshunter.io/developer/1691306257)
- Category: Utilities
- Price: $2.99
- Age rating: 9+
- Requires: iOS 26.2 · 61 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-11-04
- Data updated: 2026-11-07

## What is Oalculator?

Oalculator is a retro-style calculator, with a typewriter on iPhone Duo.

Round keys and a seven-segment display, with memory keys, percent, percent change and square root. It follows your light or dark setting.

MADE FOR IPHONE DUO
• On the inner display, a typewriter prints each sum on a sheet of paper.
• Tear the sheet off when you're done. It goes into an archive you can flip through.
• Every sheet has a line for you on its back. Turn it over to read it.
• Keep the ones that matter. Save or share either side as an image.

The typewriter needs the inner display of iPhone Duo; other iPhones don't have it.

PRIVACY
Everything stays on your device. No account, no servers, no analytics, no ads.

## Is Oalculator safe?

Not enough ratings yet to assess Oalculator.

## Is Oalculator legit?

Oalculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Oalculator is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.4.0 — 2026-11-04

No release notes.

## More apps by 汝衡 冯

- [Todoo！记忆土豆｜一键识别屏幕内容，生成提醒和备忘！](https://appshunter.io/ios/app/todoo/id6754839033)
- [TodooCam！土豆拍立得 —— 一款电子拍立得相机](https://appshunter.io/ios/app/todoocam/id6780148714)
- [两面 · 封面与文字](https://appshunter.io/ios/app/id6827454886)

All apps by 汝衡 冯: https://appshunter.io/developer/1691306257

## Related topics

[ocel](https://appshunter.io/ios/topics/ocel)

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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 2026-11-07.*