# RU REGIS. vs OpenDurian

The clearest difference is in-app purchases: RU REGIS. at none against OpenDurian's 10. RU REGIS. also leads on iOS requirement (11.0 vs 15.0). OpenDurian's advantage is update cadence (every 4 days vs every 6 months). On price, ads and device support there is nothing between them.

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

RU REGIS. ships an update every 6 months, OpenDurian every 4 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | RU REGIS. | OpenDurian |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ru-regis/id1453633675/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 18.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 37 MB | 96 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RAMKHAMHAENG UNIVERSITY](https://appshunter.io/developer/1453633674) | [OpenDurian](https://appshunter.io/developer/919058398) |

## What reviewers say

### RU REGIS.

[App page](https://appshunter.io/ios/app/ru-regis/id1453633675)

This app helps Ramkhamhaeng University students register for courses. It allows users to view university news, search for subjects, check credits, and calculate registration fees for faster payment. You can also verify receipts after successful payment.

**Highlights:** View university news, Search for subjects and credits, Calculate registration fees, Verify payment receipts, Check exam schedules

**Features:** macOS Compatibility

**In-app purchases:** none


### OpenDurian

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

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FS The Ghost Stories เก่งอัง | $3.99 | one-time |
| FS English Menu เก่งภาษา | $3.99 | one-time |
| News Bites English เก่งอังกฤษจ | $4.99 | one-time |
| เก่งอังกฤษตังแต่คําแรก by Kru | $4.99 | one-time |
| FS เก่งอังกฤษตังแต่คําแรก by K | $4.99 | one-time |
| แต่งประโยคอังกฤษจากภาพ by Kru | $4.99 | one-time |
| FS แต่งประโยคอังกฤษจากภาพ by K | $4.99 | one-time |
| FS News Bites English เก่งอังก | $4.99 | one-time |
| Book Expo  Only Me วันนี้.. | $7.99 | one-time |
| Book Expo  Only Me วันนี้. | $7.99 | one-time |


## Frequently asked questions

### Is RU REGIS. free?

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

### Is OpenDurian free?

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

### Do RU REGIS. or OpenDurian have ads?

Neither RU REGIS. nor OpenDurian shows ads.

### Which is updated more often, RU REGIS. or OpenDurian?

RU REGIS. ships an update every 6 months, and OpenDurian every 4 days. Most recently, RU REGIS. was updated on November 2, 2026 and OpenDurian on November 5, 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.*