# 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 vs Zengo

The clearest difference is iOS requirement: Zengo at 9.0 against 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜'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.

視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 ships an update every 4 weeks, Zengo fortnightly. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 | Zengo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 90 MB | 94 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tomohiro Sasaki](https://appshunter.io/developer/1291219090) | [Gonosen Inc](https://appshunter.io/developer/1567371777) |

## What reviewers say

### 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜

[App page](https://appshunter.io/ios/app/3d/id1581232931)

This app offers vision tests and training exercises to improve eyesight. It includes Gabor patch games and 3D stereogram images for at-home vision recovery. Ideal for quick eye checks and improving vision in your spare time.

**Highlights:** Vision testing, Gabor patch games for vision recovery, 3D stereogram images, Train vision in spare time, Eye health exercises

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

**In-app purchases:** none


### Zengo

[App page](https://appshunter.io/ios/app/zengo/id1585295471)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 free?

視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 is free to download, with no in-app purchases.

### Is Zengo free?

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

### Do 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 or Zengo have ads?

Both 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 and Zengo show ads.

### Which is updated more often, 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 or Zengo?

視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 ships an update every 4 weeks, and Zengo fortnightly. Most recently, 視力回復 〜視力検査/ガボールパッチ/3Dテレオグラム〜 was updated on October 7, 2026 and Zengo 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.*