# 先生 vs GravityLoop

The clearest difference is ads: 先生 at none against GravityLoop's shown. 先生 also leads on iOS requirement (6.0 vs 17.5). GravityLoop's advantage is update cadence (every 2 days vs every 43 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.

先生 ships an update every 43 months, GravityLoop every 2 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 先生 | GravityLoop |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 90.9% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 43 months | **Every 2 days** |
| Size | 23 MB | 6 MB |
| Requires iOS | **6.0** | 17.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 17+ |
| Developer | [m7kenji](https://appshunter.io/developer/423804891) | [Keita Tamura](https://appshunter.io/developer/1841767385) |

## What reviewers say

### 先生

[App page](https://appshunter.io/ios/app/id853166104)

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

**In-app purchases:** none


### GravityLoop

[App page](https://appshunter.io/ios/app/gravityloop/id6752917479)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 先生 free?

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

### Is GravityLoop free?

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

### Do 先生 or GravityLoop have ads?

GravityLoop shows ads; 先生 does not.

### Which is updated more often, 先生 or GravityLoop?

先生 ships an update every 43 months, and GravityLoop every 2 days. Most recently, 先生 was updated on November 6, 2026 and GravityLoop on October 30, 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.*