Rechenmuffel vs The Shape Factory
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rechenmuffel
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- Eigene Aufgaben auf einer Arbeitsfläche eingeben, nachträglich bearbeiten und verschieben - Rechenmuffel zeigt nur an, ob eine eingegebene (Un)Gleichung richtig ist, verrät jedoch keine Ergebnisse - Rechnen mit den in der Grundschule üblichen Maßeinheiten, auch mit Stellenwerten sowie mit Tabellen proportionaler Zuordnungen - Weitergabe von Aufgaben mit QR-Code - Löschen einzelner Aufgaben durch Ziehen auf das Mülleimersymbol, Löschen aller Aufgaben durch Antippen des Symbols. - weitere Einstellungen in den iOS-Einstellungen unter "Rechenmuffel" Beispielaufgaben a) Ergebnisse vorgeben „Finde zu einem Ergebnis möglichst viele Malaufgaben“ „Finde Divisionsaufgaben mit dem Rest 7“ b)Vertiefte Einsicht durch Konstruieren „Schreibe schwierige Aufgaben mit Klammern auf“ „Erfinde eine Geteiltaufgabe, deren Lösung mehrere Schritte benötigt“ „Schreibe eine Gleichungskette mit vielen Rechenarten auf“ c) Sprachausgabe nutzen „Schreibe gehörte Zahlen stellengerecht auf (Zahlendiktat)“ „Notiere für einen Mitschüler Kopfrechenaufgaben“ d) Kontrollieren von Schulbuchaufgaben
The Shape Factory
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Shape Factory is an educational learning environment for primary school children (ages 7–10) that promotes algorithmic thinking, problem-solving, and spatial reasoning through an engaging factory simulation. Designed by Prof. Dr. Günter Krauthausen and Jun.-Prof. Dr. Christian Urff, the app combines educational expertise with child-friendly design. In a virtual factory, children configure machines that transform colored geometric workpieces step by step: drawing lines, punching holes, and rotating shapes. Through visual representation and immediate feedback, children directly experience how their decisions affect the outcome. FIVE GAME MODES FOR DIVERSE LEARNING • Experiment – Freely explore machines and their effects through discovery learning • Predict – Mentally predict the result of a production line, then verify • Make – Design production lines to create ordered workpieces and find different solutions • Optimize – Identify redundant machines and achieve the same result more efficiently • Repair – Analyze, diagnose, and fix faulty production lines EDUCATIONAL FEATURES • Four difficulty levels per mode with optional expert mode • Adaptive difficulty that automatically adjusts to the learner's level • Warehouse for saving, comparing, and sorting production lines • QR code exchange for sharing configurations between devices • Add notes to saved configurations • PDF export and photo saving of production lines COMPREHENSIVE TEACHER SETTINGS • Show or hide individual game modes to match the classroom situation • Control difficulty levels and adaptive adjustment • Individually configure counters, warehouse, and QR code features • Enable or disable automatic task progression • Built-in information about task formats and classroom use LEARNING GOALS The app fosters algorithmic thinking, spatial reasoning (mental rotation, orientation, symmetry), problem-solving skills, logical reasoning, optimization thinking, and systematic approaches. It is ideal for mathematics, science, and computer science education. TEACHING GUIDE A comprehensive didactic guide with lesson scenarios, research questions, differentiation tips, and methodological recommendations is available free of charge at www.urff.app/formen-fabrik. PRIVACY & SAFETY • No ads • No tracking • No in-app purchases • No internet connection required • No registration needed • All data stays on the device Shape Factory – built for children, designed for the classroom.
Verdict
The clearest difference is iOS requirement: Rechenmuffel at 15.0 against The Shape Factory's 17.0. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Rechenmuffel | The Shape Factory |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 10 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Martin Dumont | Christian Urff |
In-app purchases
Rechenmuffel
No in-app purchases
The Shape Factory
No in-app purchases
Questions
Is Rechenmuffel free?
Is The Shape Factory free?
Do Rechenmuffel or The Shape Factory have ads?
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