Comparison

Number Decomposition vs ZHB FRIDA

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

Head to head
About

Number Decomposition

This educational app teaches children foundational math skills by focusing on number bonds up to 10, avoiding counting to build a strong understanding of arithmetic. It uses visual aids and a structured approach for quick, accurate recall of addition and subtraction facts.

Highlights
  • Number bonds up to 10
  • Drag and drop interface
  • Visual quantity images
  • Spaced repetition learning
  • Child-friendly avatars
  • Offline functionality
Features
Read full description

LEARN MATH – WITHOUT COUNTING Many children learn arithmetic by counting. That is tedious and often the start of later difficulties with math. This app begins exactly where true understanding develops after quantity–number correspondence: with the automation of number bonds up to 10. Children learn how numbers are structured and can solve addition and subtraction tasks safely, quickly, and from memory. No counting, no frustration, with visible success. HOW IT WORKS • Example: 8 = ? and 3 • One part is given, the other is added via drag & drop • Correct? → reward and progress • Wrong? → gentle feedback and repeat • Only fast, correct answers (under 5 seconds) count as “known by heart” MADE FOR CHILDREN – EVEN WITHOUT READING • Intuitive operation with number tiles and structured quantity images (dice, fingers, dots, and more) • Four child-friendly animal avatars: panda, dolphin, cat, dog • Each correct task colors the avatar more • Learning progress is always visible and motivating FOCUSED LEARNING INSTEAD OF A GAME APP • Reduced sounds and calm, clear visuals • No distracting effects, no flashy colors • Clear didactic structure: not a game, but a real teaching and learning app PEDAGOGICALLY SOUND – RESEARCH-BASED • Leitner learning system with spaced repetition (boxes 1–4) • Didactic reduction: only meaningful decompositions, no swapped pairs, no zero • Structured quantity images strengthen number sense and understanding • Error-oriented learning: incorrect tasks are deliberately repeated • Progress per avatar is transparent – also for parents and teachers SAFE AND AD-FREE • No ads • No in-app purchases • Works offline – ideal for on the go • One-time purchase, permanent use DOWNLOAD NOW – MAKE MATH SIMPLE With this app, your child becomes a master of number bonds: playful, visually structured, and sustainable. Ideal for preschool, first grade, or home practice – without distractions and with full focus on what matters.

About

ZHB FRIDA

Features
Read full description

In FRIDA können Sie in getrennten Suchräumen für die Europa-Universität Flensburg, die Hochschule Flensburg oder im Gesamtbestand für den Campus sowie im Bibliotheksverbund recherchieren. Sie können den Standort und die Verfügbarkeit von Medien einsehen, Vormerkungen auf entliehene Medien tätigen und Bestellungen für Medien aus den geschlossenen Magazinen aufgeben. Online verfügbare Titel können Sie über einen Link direkt öffnen. Über Ihr Bibliothekskonto haben Sie Einsicht in Ihre abholbaren Bestellungen, Entleihungen und Vormerkungen sowie mögliche Gebühren. Außerdem können Sie die Leihfrist entliehener Medien verlängern und bei Bedarf Ihr Passwort ändern.

Screenshots

Number Decomposition4 screens
ZHB FRIDA4 screens

Verdict

The call

The clearest difference is price: ZHB FRIDA at Free against Number Decomposition's $3.99. ZHB FRIDA also leads on update cadence (every 3 weeks vs every 5 months) and iOS requirement (13.0 vs 17.0). On 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

ZHB FRIDA is free to download; Number Decomposition costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Number Decomposition ships an update every 5 months, ZHB FRIDA every 3 weeks. The most recent releases landed on September 15, 2026 and September 13, 2026 respectively.

Scorecard3 real differences · 5 level
Number Decomposition versus ZHB FRIDA: the parameters behind the verdict, then further details
ParameterNumber DecompositionZHB FRIDA
Price$3.99Free — better
Positive reviews100.0% of reviews—
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size78 MB14 MB
Age rating4+4+
DeveloperLernwunderGBV

In-app purchases

None

Number Decomposition

No in-app purchases

None

ZHB FRIDA

No in-app purchases

Questions

Is Number Decomposition free?
Number Decomposition costs $3.99, with no in-app purchases.
Is ZHB FRIDA free?
ZHB FRIDA is free to download, with no in-app purchases.
Do Number Decomposition or ZHB FRIDA have ads?
Neither Number Decomposition nor ZHB FRIDA shows ads.
Which is updated more often, Number Decomposition or ZHB FRIDA?
Number Decomposition ships an update every 5 months, and ZHB FRIDA every 3 weeks. Most recently, Number Decomposition was updated on September 15, 2026 and ZHB FRIDA on September 13, 2026.

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