Comparison

OSG App vs Cat4School

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

OSG App

Free

📚 Education

★ 3.33 ratingsView app →

About

OSG App

This app provides quick access to the OSG Mainz portal, offering personalized class schedules and substitute plans. It facilitates digital class registers and absence management, with push notifications for messages and important updates.

Highlights

Personalized class and substitute schedules
Digital class register
Absence management
Push notifications for messages
Quick portal connection

Features

Read full description

Die OSG App ermöglicht eine schnelle Anbindung an das Portal des OSG Mainz. Stunden- und Vertretungspläne sind schnell und individualisiert verfügbar. Das digitale Klassenbuch- und Fehlzeitenmanagement ist ohne Probleme möglich. Für Chatnachrichten, Vertretungsplan-, Stundenplanänderungen und Elternbriefe werden Push Nachrichten verschickt.

About

Cat4School

Features

Read full description

Die Schul-App für Schüler, Eltern, Lehrpersonen der Cat4School - Organisations- und Kommunikationsplattform.

Screenshots

OSG App4 screens

Cat4School4 screens

Verdict

The call

The clearest difference is update cadence: OSG App at every 3 months against Cat4School's every 11 months. On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

OSG App ships an update every 3 months, Cat4School every 11 months. Both last shipped on September 16, 2026.

Scorecard1 real difference · 9 level

OSG App versus Cat4School: the parameters behind the verdict, then further details
Parameter	OSG App	Cat4School
Price	Free	Free
Rating	3.3 (3 ratings) — better	—
Positive reviews	25.0% of reviews	—
Number of ratings	3 — better	—
Update frequency	Every 3 months — better	Every 11 months
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	15.0
Further details — not scored
Size	40 MB	21 MB
Age rating	4+	4+
Developer	Jan Philipp Dahms	Christoph Brecht

In-app purchases

None

OSG App

No in-app purchases

None

Cat4School

No in-app purchases

Questions

Is OSG App free?

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

Is Cat4School free?

Cat4School is free to download, with no in-app purchases.

Do OSG App or Cat4School have ads?

Neither OSG App nor Cat4School shows ads.

Which is updated more often, OSG App or Cat4School?

OSG App ships an update every 3 months, and Cat4School every 11 months. Most recently, OSG App was updated on September 16, 2026 and Cat4School on September 16, 2026.