# KeyFile vs 汽车学会

The clearest difference is update cadence: 汽车学会 at monthly against KeyFile's every 3 months. KeyFile's advantage is iOS requirement (11.0 vs 14.0). On price, ads, 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.

KeyFile ships an update every 3 months, 汽车学会 monthly. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | KeyFile | 汽车学会 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 138 MB | 18 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wuhan Tianyu Software Co., Ltd.](https://appshunter.io/developer/867910657) | [中国汽车工程学会](https://appshunter.io/developer/1808580880) |

## What reviewers say

### KeyFile

[App page](https://appshunter.io/ios/app/keyfile/id950959896)

**Features:** macOS Compatibility

**In-app purchases:** none


### 汽车学会

[App page](https://appshunter.io/ios/app/id6744626478)

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

**In-app purchases:** none


## Frequently asked questions

### Is KeyFile free?

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

### Is 汽车学会 free?

汽车学会 is free to download, with no in-app purchases.

### Do KeyFile or 汽车学会 have ads?

Neither KeyFile nor 汽车学会 shows ads.

### Which is updated more often, KeyFile or 汽车学会?

KeyFile ships an update every 3 months, and 汽车学会 monthly. Most recently, KeyFile was updated on November 1, 2026 and 汽车学会 on November 2, 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.*