# 优牙库 vs 校友录ALUMNI

The clearest difference is iOS requirement: 优牙库 at 13.0 against 校友录ALUMNI's 15.0. 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.

优牙库 ships an update monthly, 校友录ALUMNI every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 优牙库 | 校友录ALUMNI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6742437283/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 35 MB | 93 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [美吧](https://appshunter.io/developer/1798399852) | [河北知物信息科技有限公司](https://appshunter.io/developer/1799093294) |

## What reviewers say

### 优牙库

[App page](https://appshunter.io/ios/app/id6742437283)

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

**In-app purchases:** none


### 校友录ALUMNI

[App page](https://appshunter.io/ios/app/alumni/id6742598597)

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

**In-app purchases:** none


## Frequently asked questions

### Is 优牙库 free?

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

### Is 校友录ALUMNI free?

校友录ALUMNI is free to download, with no in-app purchases.

### Do 优牙库 or 校友录ALUMNI have ads?

Neither 优牙库 nor 校友录ALUMNI shows ads.

### Which is updated more often, 优牙库 or 校友录ALUMNI?

优牙库 ships an update monthly, and 校友录ALUMNI every 3 weeks. Most recently, 优牙库 was updated on October 24, 2026 and 校友录ALUMNI on October 28, 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.*