# TinyWatchCalc vs Thumb calculator

The clearest difference is ads: TinyWatchCalc at none against Thumb calculator's shown. TinyWatchCalc also leads on iOS requirement (12.0 vs 15.8.3). Thumb calculator's advantage is update cadence (every 2 weeks vs every 16 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TinyWatchCalc ships an update every 16 months, Thumb calculator every 2 weeks. The most recent releases landed on September 28, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | TinyWatchCalc | Thumb calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 2 weeks** |
| Size | 9 MB | 35 MB |
| Requires iOS | **12.0** | 15.8.3 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Entwistle](https://appshunter.io/developer/955246260) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### TinyWatchCalc

[App page](https://appshunter.io/ios/app/tinywatchcalc/id1030102319)

**Features:** macOS Compatibility

**In-app purchases:** none


### Thumb calculator

[App page](https://appshunter.io/ios/app/thumb-calculator/id6499389948)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TinyWatchCalc free?

TinyWatchCalc is free to download, with no in-app purchases.

### Is Thumb calculator free?

Thumb calculator is free to download, with no in-app purchases.

### Do TinyWatchCalc or Thumb calculator have ads?

Thumb calculator shows ads; TinyWatchCalc does not.

### Which is updated more often, TinyWatchCalc or Thumb calculator?

TinyWatchCalc ships an update every 16 months, and Thumb calculator every 2 weeks. Most recently, TinyWatchCalc was updated on September 28, 2026 and Thumb calculator on September 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*