# Substitutes vs Stundio

The clearest difference is iOS requirement: Stundio at 15.5.0 against Substitutes's 18. On price, update cadence, 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.

Substitutes ships an update every 3 months, Stundio every 2 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Substitutes | Stundio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 3 MB | 29 MB |
| Requires iOS | 18 | **15.5.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jan Wittler](https://appshunter.io/developer/805834216) | [Stundio Software](https://appshunter.io/developer/1691263089) |

## 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


### Stundio

[App page](https://appshunter.io/ios/app/stundio/id6740147540)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Substitutes free?

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

### Is Stundio free?

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

### Do Substitutes or Stundio have ads?

Neither Substitutes nor Stundio shows ads.

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

Substitutes ships an update every 3 months, and Stundio every 2 months. Most recently, Substitutes was updated on November 1, 2026 and Stundio on November 8, 2026.

---

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