# Untis Mobile vs Sdui

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 51% of Untis Mobile's. Sdui also leads on iOS requirement (15.0 vs 17.0). Untis Mobile's advantage is ratings volume (1.8K 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.

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 1.8K ratings behind it against 53, so its average is the more settled of the two. Written reviews are what separate them: 51% 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 November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Untis Mobile | Sdui |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (1.8K ratings)](https://appshunter.io/ios/app/untis-mobile/id926186904/reviews) | **[4.5 (53 ratings)](https://appshunter.io/ios/app/sdui/id1145264453/reviews)** |
| Number of ratings | **1.8K** | 53 |
| Positive reviews | 50.7% of reviews | **81.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 58 MB | 52 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Untis GmbH](https://appshunter.io/developer/1112298871) | [Sdui GmbH](https://appshunter.io/developer/1034926222) |

## What reviewers say

### Untis Mobile

[App page](https://appshunter.io/ios/app/untis-mobile/id926186904)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great app for school
- 👍 Helpful for staying on top of homework and schedule
- 👍 Provides good overview of classes and timetable
- 👍 Useful for seeing if a teacher is absent

**What reviewers complain about**

- 🐛 Buggy and unreliable
- 🤔 Desktop and mobile versions have different features
- 🤔 New design is confusing and less user-friendly
- 🐛 Doesn't always show accurate or up-to-date information

**Reported bugs**

- Login issues
- Crashes and freezes
- Incorrect or missing schedule information
- Compatibility problems with newer OS versions

**Requested features**

- Allow students to text classmates
- Add ability to see grades
- Improve homework tracking and notifications
- Provide more customization options


### 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 Untis Mobile free?

Untis Mobile 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, Untis Mobile or Sdui?

Sdui is rated higher. Untis Mobile averages 4.5 out of 5 from 1.8K ratings, while Sdui averages 4.5 from 53 ratings.

### Do Untis Mobile or Sdui have ads?

Neither Untis Mobile nor Sdui shows ads.

### Which is updated more often, Untis Mobile or Sdui?

Untis Mobile ships an update every 2 weeks, and Sdui every 5 weeks. Most recently, Untis Mobile was updated on November 1, 2026 and Sdui on November 2, 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.*