Untis Mobile vs Sdui
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Untis Mobile
Access your school schedule, substitution plans, and class registers on the go. Communicate with teachers, guardians, and students through messages and receive important notifications. Manage attendance, sick notes, and exam details.
- Individual timetable (offline access)
- Daily updated substitution plan
- Digital class register (attendance, sick notes)
- Lesson cancellations and room changes
- Exam dates and homework tracking
- Secure messaging between school members
- Push notifications for new messages
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Untis makes it all easy With Untis Mobile, you have many functions of WebUntis on the go and all important information for a smooth school day are available at all times. Information at your fingertips anytime and anywhere: - Individual timetable – also available offline - Daily updated substitution plan - Digital class register: Attendance check, class register entries, sick note by students or parents - Lesson cancellations and room changes - Exam dates, homework and video links to online lessons directly in the timetable - Contact hours with registration School communication between teachers, legal guardians and students: - Messages: Parent letters, important announcements, ... - Push notification when receiving a new message - Request and send read confirmation Additional WebUntis modules – e.g. Digital Class Book, Appointments, Parents-teacher days and much more – expand the app's functionality. +++ In order to use the Untis Mobile App, the WebUntis basic package must first be booked by the school +++ Untis is the all-in-one solution for professional scheduling, substitution planning and school communication. Regardless of whether you need to schedule a complex timetable, administer digital class registers, coordinate parent-teacher days, plan resources or schedule break supervisions: Untis assists you in all your complex tasks with bespoke solutions - and has been doing so for over 50 years. Over 26.000 educational institutions worldwide – from elementary schools to complex universities – work with our products. A regional network of partner companies enables the best support of our customers locally. https://www.untis.at/en
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
Untis Mobile and Sdui both sit at 4.5 stars, but that hides the real split: 82% of Sdui's written reviews are positive against 50% of Untis Mobile's. Sdui also leads on iOS requirement (15.0 vs 17.0). Untis Mobile's advantage is ratings volume (1.7K vs 53) and update cadence (every 2 weeks vs every 5 weeks). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 4.5 for Untis Mobile against 4.5 for Sdui. That said, the two scores are not equally well evidenced: Untis Mobile has 1.7K ratings behind it against 53, so its average is the more settled of the two. Written reviews are what separate them: 50% of Untis Mobile's written reviews are positive against 82% of Sdui's.
Untis Mobile ships an update every 2 weeks, Sdui every 5 weeks. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.
| Parameter | Untis Mobile | Sdui |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.7K ratings) | 4.5 (53 ratings) |
| Positive reviews | 50.3% of reviews | 81.8% of reviews — better |
| Number of ratings | 1.7K — better | 53 |
| Update frequency | Every 2 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 54 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Untis GmbH | Sdui GmbH |
Customer experience
Untis Mobile
Sdui
Bugs and requests
Untis Mobile
Reported bugs
4 issues- Login issues
- Crashes and freezes
- Incorrect or missing schedule information
- Compatibility problems with newer OS versions
Requested features
4 requests- Allow students to text classmates
- Add ability to see grades
- Improve homework tracking and notifications
- Provide more customization options
Sdui
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Untis Mobile
No in-app purchases
Sdui
No in-app purchases








