# PERC vs 宜乐教师端

The clearest difference is update cadence: PERC at every 3 weeks against 宜乐教师端's every 2 months. PERC also leads on iOS requirement (10.0 vs 13.0). 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.

PERC ships an update every 3 weeks, 宜乐教师端 every 2 months. The most recent releases landed on September 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PERC | 宜乐教师端 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 50 MB | 31 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市好学多科技有限公司](https://appshunter.io/developer/1568037324) | [Dalian Beiyou Education Consulting Co., Ltd.](https://appshunter.io/developer/1764837522) |

## What reviewers say

### PERC

[App page](https://appshunter.io/ios/app/perc/id1575353864)

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

**In-app purchases:** none


### 宜乐教师端

[App page](https://appshunter.io/ios/app/id6747280077)

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

**In-app purchases:** none


## Frequently asked questions

### Is PERC free?

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

### Is 宜乐教师端 free?

宜乐教师端 is free to download, with no in-app purchases.

### Do PERC or 宜乐教师端 have ads?

Neither PERC nor 宜乐教师端 shows ads.

### Which is updated more often, PERC or 宜乐教师端?

PERC ships an update every 3 weeks, and 宜乐教师端 every 2 months. Most recently, PERC was updated on September 28, 2026 and 宜乐教师端 on October 9, 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.*