# Substitutes vs Horarium

The clearest difference is update cadence: Horarium at every 3 days against Substitutes's every 3 months. Horarium also leads on review sentiment (100% vs 71%). Substitutes's advantage is iOS requirement (18 vs 26.0). 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.

Substitutes ships an update every 3 months, Horarium every 3 days. The most recent releases landed on September 5, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Substitutes | Horarium |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 71.4% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 3 MB | 12 MB |
| Requires iOS | **18** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jan Wittler](https://appshunter.io/developer/805834216) | [Berenike Krause](https://appshunter.io/developer/1831456925) |

## What reviewers say

### Substitutes

[App page](https://appshunter.io/ios/app/substitutes/id805834213)

Access your school's substitution schedule directly on your iPhone or iPad. Stay updated automatically with timetable changes, even offline. You can also input your personal schedule for a consolidated view of all your classes and substitutions.

**Highlights:** Real-time substitution plan updates, Offline access to schedule, Personal timetable input, Automatic course synchronization, Supports schools across Germany

**In-app purchases:** none


### Horarium

[App page](https://appshunter.io/ios/app/horarium-timetable-for-untis/id6758463532)

Organize your school schedule with this modern timetable app. It syncs automatically with Untis and WebUntis, highlighting changes and allowing you to manage homework and absences. Customize your view and receive timely notifications.

**Highlights:** Automatic Untis/WebUntis sync, Real-time substitution and cancellation alerts, Integrated homework planner, Customizable timetable views, Home screen widgets, Color-coded subject customization, Absence tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Substitutes free?

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

### Is Horarium free?

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

### Do Substitutes or Horarium have ads?

Neither Substitutes nor Horarium shows ads.

### Which is updated more often, Substitutes or Horarium?

Substitutes ships an update every 3 months, and Horarium every 3 days. Most recently, Substitutes was updated on September 5, 2026 and Horarium on September 14, 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.*