bettermarks vs Sdui
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
bettermarks
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.
- Instant feedback on math problems
- Learn from mistakes with immediate response
- Teacher portal for assignments
- Evaluate student results
- Extensive library of math exercises
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For students: Math is mostly either loved or hated. No matter what your feelings are, we want to make learning math easier and to help you practice! A worksheet gives no response, so you don't know if you solved a problem correctly. With bettermarks, you always get a response, so you can learn from your mistakes. For teachers: Use the bettermarks app to log in to the teacher portal. Browse the library with over 100,000 exercises, assign content and evaluate students' results. A license is required to use the app.
Sdui
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.
- Secure chats
- School news
- Surveys
- Digital class register
- Sick notifications
- Unified platform
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Wherever time and effort can be saved, Sdui comes into play - in other words: we simplify communication and organisation in schools and daycare centres. This is how we help make everyday life in educational organisations easier. We develop GDPR-compliant solutions that connect teachers, eductators, parents and children in order to shape the education of the future together. Features such as secure chats, school news, surveys, digital class register, sick notifications and many more are conveniently accessible from one single platform. - To use Sdui at a school, the school administration must register your school in the application - Do you need more information? Find out more at http://sdui.de/?lang=en ! - If you need help or hints on how to use the application visit out support page at http://support.sdui.de/en_US.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | bettermarks | Sdui |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) | 4.5 (53 ratings) — better |
| Positive reviews | 40.9% of reviews | 81.8% of reviews — better |
| Number of ratings | 3 | 53 — better |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 22 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | bettermarks GmbH | Sdui GmbH |
Customer experience
bettermarks
Sdui
In-app purchases
bettermarks
No in-app purchases
Sdui
No in-app purchases
