Comparison

Kalkulino vs Number Decomposition

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

Head to head
About

Kalkulino

Features
Read full description

Kalkulino ist ein durchdachtes Mathe-Lernspiel für Grundschulkinder der 1., 2. und 3. Klasse. Mit einem spielintegrieren Ansatz sind hier wichtige mathematische Grundfertigkeiten in das Spielprinzip eingebetet: (Quasi-)simultane Mengenerfassung, Zahlenzerlegung, Teile-Ganzes-Verständnis, Addition und Subtraktion. Es müssen Zahlen strategisch geschickt gesetzt und zerlegt werden, um Zielsteine (z.b. bei der 10 oder 20) genau zu erreichen und Punkte zu bekommen. SPIELPRINZIP   Lege Zahlensteine geschickt auf das Spielfeld und erreiche das Zielfeld. Dabei lernst du, Zahlen zu zerlegen, strategisch zu denken und schnell zu rechnen. FEATURES • Zwei Spielmodi: Kompetitiv (gegeneinander) oder Kooperativ (zusammen gegen die Zeit) • Intelligenter Computer-Gegner mit drei Schwierigkeitsstufen • 8 progressive Schwierigkeitsstufen – vom Anfänger bis zum Mathe-Meister • Verschiedene Spielfeldgrößen (5 bis 25) • Interaktives Tutorial für den leichten Einstieg • Spielerstatistiken LERNZIELE • Zahlenzerlegung und -zusammensetzung • Sichere Addition und Subtraktion • Strategisches Denken und Planen BESONDERHEITEN • Komplett werbefrei • Keine In-App-Käufe • Deutsch und Englisch • Anpassbare Spielregeln und Schwierigkeitsgrad für individuelles Lernen • Entwickelt auf der Basis von mathematikdidaktischen Erkenntnissen von Prof. Dr. Christian Urff (Pädagogische Hochschule Weingarten)   Kalkulino wurde speziell entwickelt, um Kindern zu helfen, vom zählenden Rechnen zu effizienten Rechenstrategien zu gelangen – eine wichtige Grundlage für den weiteren Mathematikunterricht.

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.

Screenshots

Number Decomposition4 screens

Verdict

The call

The clearest difference is price: Kalkulino at $1.99 against Number Decomposition's $3.99. On ads, in-app purchases, device support and iOS requirement 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

Kalkulino costs $1.99 and Number Decomposition $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 7 level
Kalkulino versus Number Decomposition: the parameters behind the verdict, then further details
ParameterKalkulinoNumber Decomposition
Price$1.99 — better$3.99
Positive reviews—100.0% of reviews
Update frequency—Every 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPadiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size4 MB78 MB
Age rating4+4+
DeveloperChristian UrffLernwunder

In-app purchases

None

Kalkulino

No in-app purchases

None

Number Decomposition

No in-app purchases

Questions

Is Kalkulino free?
Kalkulino costs $1.99, with no in-app purchases.
Is Number Decomposition free?
Number Decomposition costs $3.99, with no in-app purchases.
Do Kalkulino or Number Decomposition have ads?
Neither Kalkulino nor Number Decomposition shows ads.

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