# KPF伴学 vs 青矩online

The clearest difference is in-app purchases: KPF伴学 at none against 青矩online's 2. KPF伴学 also leads on update cadence (every 2 months vs every 8 months). 青矩online's advantage is iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. 青矩online sells 2 one-off in-app purchases. KPF伴学 asks for nothing beyond the download.

KPF伴学 ships an update every 2 months, 青矩online every 8 months. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | KPF伴学 | 青矩online |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Size | 445 MB | 80 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [家盛 王](https://appshunter.io/developer/1469357476) | [Qingju Technology Co., Ltd.](https://appshunter.io/developer/1474183707) |

## What reviewers say

### KPF伴学

[App page](https://appshunter.io/ios/app/kpf/id1296749527)

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

**In-app purchases:** none


### 青矩online

[App page](https://appshunter.io/ios/app/online/id1440706066)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 128Q | $19.99 | one-time |
| 618Q | $94.99 | one-time |


## Frequently asked questions

### Is KPF伴学 free?

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

### Is 青矩online free?

青矩online is free to download, with in-app purchases available.

### Do KPF伴学 or 青矩online have ads?

Neither KPF伴学 nor 青矩online shows ads.

### Which is updated more often, KPF伴学 or 青矩online?

KPF伴学 ships an update every 2 months, and 青矩online every 8 months. Most recently, KPF伴学 was updated on October 9, 2026 and 青矩online on October 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.*