# OpenFlat vs 学霸错题本

The clearest difference is in-app purchases: 学霸错题本 at none against OpenFlat's 10. OpenFlat's advantage is update cadence (every 2 weeks vs monthly) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. OpenFlat sells 10 in-app purchases, starting at $49.99 per month. 学霸错题本 asks for nothing beyond the download.

OpenFlat ships an update every 2 weeks, 学霸错题本 monthly. The most recent releases landed on September 13, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | OpenFlat | 学霸错题本 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/openflat/id6756606310/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 4 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [柳 杨](https://appshunter.io/developer/1734826226) | [海波 杨](https://appshunter.io/developer/1775708240) |

## What reviewers say

### OpenFlat

[App page](https://appshunter.io/ios/app/openflat/id6756606310)

This app provides an online teaching platform for individual instructors, featuring interactive whiteboards, audio/video communication, presentation tools, and recording capabilities. Users can easily join, create, and schedule virtual classrooms. It aims to be the preferred tool for online educators.

**Highlights:** Multi-person online whiteboard, Audio and video communication, PPT presentation with animations, Room recording and playback, Screen sharing, Room creation, joining, and scheduling

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenFlat 高级版连续包月 | $49.99 | per month |
| OpenFlat 基础版连续包年 | $79.99 | per year |
| OpenFlat 课次购买 | $0.99 | one-time |
| OpenFlat 基础版一个月 | $6.99 | one-time |
| OpenFlat 专业版一个月 | $22.99 | one-time |
| OpenFlat 高级版一个月 | $49.99 | one-time |
| OpenFlat 基础版十二个月 | $79.99 | one-time |
| OpenFlat 专业版十二个月 | $249.99 | one-time |
| OpenFlat 高级版十二个月 | $599.99 | one-time |
| OpenFlat 畅享版 | $900.00 | one-time |


### 学霸错题本

[App page](https://appshunter.io/ios/app/id6761485861)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenFlat free?

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

### Is 学霸错题本 free?

学霸错题本 is free to download, with no in-app purchases.

### Do OpenFlat or 学霸错题本 have ads?

Neither OpenFlat nor 学霸错题本 shows ads.

### Which is updated more often, OpenFlat or 学霸错题本?

OpenFlat ships an update every 2 weeks, and 学霸错题本 monthly. Most recently, OpenFlat was updated on September 13, 2026 and 学霸错题本 on August 21, 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.*