# bettermarks vs Sdui

The clearest difference is rating: Sdui at 4.5 against bettermarks's 3.0. Sdui also leads on review sentiment (82% vs 41%) and ratings volume (53 vs 3). bettermarks's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sdui holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Sdui has 53 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 41% of bettermarks's written reviews are positive against 82% of Sdui's.

bettermarks ships an update every 4 months, Sdui every 5 weeks. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | bettermarks | Sdui |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/bettermarks/id897503355/reviews) | **[4.5 (53 ratings)](https://appshunter.io/ios/app/sdui/id1145264453/reviews)** |
| Number of ratings | 3 | **53** |
| Positive reviews | 40.9% of reviews | **81.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 22 MB | 52 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [bettermarks GmbH](https://appshunter.io/developer/368028260) | [Sdui GmbH](https://appshunter.io/developer/1034926222) |

## What reviewers say

### bettermarks

[App page](https://appshunter.io/ios/app/bettermarks/id897503355)

This app helps students practice math with instant feedback, allowing them to learn from mistakes. Teachers can access a portal to assign exercises and track student progress. A license is required for full functionality.

**Highlights:** Instant feedback on math problems, Learn from mistakes with immediate response, Teacher portal for assignments, Evaluate student results, Extensive library of math exercises

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

**In-app purchases:** none


### Sdui

[App page](https://appshunter.io/ios/app/sdui/id1145264453)

This app streamlines communication and organization for schools and daycare centers. It connects teachers, educators, parents, and children through a GDPR-compliant platform, simplifying daily tasks and fostering collaboration in education.

**Highlights:** Secure chats, School news, Surveys, Digital class register, Sick notifications, Unified platform

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is bettermarks free?

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

### Is Sdui free?

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

### Which has better reviews, bettermarks or Sdui?

Sdui is rated higher. bettermarks averages 3.0 out of 5 from 3 ratings, while Sdui averages 4.5 from 53 ratings.

### Do bettermarks or Sdui have ads?

Neither bettermarks nor Sdui shows ads.

### Which is updated more often, bettermarks or Sdui?

bettermarks ships an update every 4 months, and Sdui every 5 weeks. Most recently, bettermarks was updated on October 7, 2026 and Sdui on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*