# SAKUSHI vs Train Clock

The clearest difference is iOS requirement: SAKUSHI at 8.0 against Train Clock's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

SAKUSHI ships an update every 35 months, Train Clock every 23 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | SAKUSHI | Train Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sakushi/id433814176/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 23 months** |
| Monetization | Free | — |
| Size | 21 MB | 143 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yournet](https://appshunter.io/developer/376969711) | [hiroyuki uchida](https://appshunter.io/developer/669938829) |

## What reviewers say

### SAKUSHI

[App page](https://appshunter.io/ios/app/sakushi/id433814176)

Explore the fascinating world of optical illusions with this app. It features 15 different types of visual illusions for you to discover and enjoy.

**Highlights:** 15 optical illusion images, Visual illusion exploration, Entertainment app

**Features:** Vision Pro support

**In-app purchases:** none


### Train Clock

[App page](https://appshunter.io/ios/app/train-clock/id1097870845)

**In-app purchases:** none


## Frequently asked questions

### Is SAKUSHI free?

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

### Is Train Clock free?

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

### Do SAKUSHI or Train Clock have ads?

Neither SAKUSHI nor Train Clock shows ads.

### Which is updated more often, SAKUSHI or Train Clock?

SAKUSHI ships an update every 35 months, and Train Clock every 23 months. Most recently, SAKUSHI was updated on November 1, 2026 and Train Clock on October 26, 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.*