# Sunadokei vs Ruler Studio

The clearest difference is ads: Ruler Studio at none against Sunadokei's shown. Ruler Studio 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. Sunadokei sells 1 one-off in-app purchase and Ruler Studio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sunadokei ships an update every 2 months, Ruler Studio every 6 weeks. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Sunadokei | Ruler Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Size | 11 MB | 19 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [atsuko imai](https://appshunter.io/developer/1830783417) | [Spyridon Bousios](https://appshunter.io/developer/1168309944) |

## What reviewers say

### Sunadokei

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

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

**In-app purchases (1)**

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


### Ruler Studio

[App page](https://appshunter.io/ios/app/ruler-studio/id6777489772)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler Pro Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is Sunadokei free?

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

### Is Ruler Studio free?

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

### Do Sunadokei or Ruler Studio have ads?

Sunadokei shows ads; Ruler Studio does not.

### Which is updated more often, Sunadokei or Ruler Studio?

Sunadokei ships an update every 2 months, and Ruler Studio every 6 weeks. Most recently, Sunadokei was updated on October 13, 2026 and Ruler Studio on October 10, 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.*