# OpenDurian vs Champ Space

The clearest difference is in-app purchases: Champ Space at none against OpenDurian's 10. OpenDurian's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, update cadence and ads there is nothing between them.

Both are free to download. OpenDurian sells 10 one-off in-app purchases. Champ Space asks for nothing beyond the download.

OpenDurian ships an update every 4 days, Champ Space weekly. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | OpenDurian | Champ Space |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Size | 95 MB | 240 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OpenDurian](https://appshunter.io/developer/919058398) | [Gravity Incorporation Limited ( Original Equipment Manufacturing )](https://appshunter.io/developer/1704799949) |

## What reviewers say

### OpenDurian

[App page](https://appshunter.io/ios/app/opendurian/id6748681576)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Book Expo  Conver พูดมันส์ | $3.99 | one-time |
| Book Expo  Conver พูดมันส์ 1 | $3.99 | one-time |
| Book Expo  Converพูดมันส์ | $3.99 | one-time |
| Book Expo  ปีศาจตัวนั้น 2 | $4.99 | one-time |
| Book Expo  IELTS CheatSheet | $4.99 | one-time |
| Book Expo  หนังสือ 500 Vocab | $5.99 | one-time |
| Book Expo  500 Vocab Grab & G | $5.99 | one-time |
| Book Expo  สมุดจำจีน HSK5 | $9.99 | one-time |
| Book Expo  สมุดจำจีน HSK4 | $11.99 | one-time |
| Book Expo  SET สมุดจำจีน Box | $22.99 | one-time |


### Champ Space

[App page](https://appshunter.io/ios/app/champ-space/id6755429795)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenDurian free?

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

### Is Champ Space free?

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

### Do OpenDurian or Champ Space have ads?

Neither OpenDurian nor Champ Space shows ads.

### Which is updated more often, OpenDurian or Champ Space?

OpenDurian ships an update every 4 days, and Champ Space weekly. Most recently, OpenDurian was updated on October 24, 2026 and Champ Space on October 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.*