# Unit Converter & Tools vs Sunadokei

The clearest difference is ads: Unit Converter & Tools at none against Sunadokei's shown. Unit Converter & Tools also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Unit Converter & Tools sells 1 in-app purchase, starting at $0.99 per month and Sunadokei sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Unit Converter & Tools ships an update every 4 weeks, Sunadokei every 5 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Unit Converter & Tools | Sunadokei |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 weeks** | Every 5 weeks |
| Size | 22 MB | 12 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Atif Mumtaz](https://appshunter.io/developer/875232775) | [atsuko imai](https://appshunter.io/developer/1830783417) |

## What reviewers say

### Unit Converter & Tools

[App page](https://appshunter.io/ios/app/unit-converter-and-tools/id6759855735)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unitverse Star | $0.99 | per month |


### Sunadokei

[App page](https://appshunter.io/ios/app/sunadokei-visual-sand-timer/id6762150420)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sunadokei Pro | $2.99 | one-time |


## Frequently asked questions

### Is Unit Converter & Tools free?

Unit Converter & Tools is free to download, with in-app purchases available.

### Is Sunadokei free?

Sunadokei is free to download, with in-app purchases available.

### Do Unit Converter & Tools or Sunadokei have ads?

Sunadokei shows ads; Unit Converter & Tools does not.

### Which is updated more often, Unit Converter & Tools or Sunadokei?

Unit Converter & Tools ships an update every 4 weeks, and Sunadokei every 5 weeks. Most recently, Unit Converter & Tools was updated on October 25, 2026 and Sunadokei on October 24, 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.*