Comparison

PsstBee vs Number Decomposition

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

Head to head
About

PsstBee

Features
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PsstBee is the interactive noise traffic light for schools and daycare. With clear color signals, the app shows the current noise level – from quiet (green) to medium (yellow) to loud (red). You can customize the dB thresholds to perfectly fit your environment. If the noise level gets too high, PsstBee alerts with both visual and acoustic signals. Perfect for the educational environment: Children learn to be considerate, while teachers and educators can easily monitor classroom noise. Features: β€’ Color signals (green/yellow/red) based on noise level β€’ Adjustable dB thresholds β€’ Visual and acoustic alarms β€’ Statistics with peak levels & loud events β€’ Multilingual support Whether in classrooms, group activities or projects – PsstBee helps create a calm learning atmosphere and promotes focus, health, and well-being. PsstBee – the smart noise traffic light for education.

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 β€’ Example: 8 = ? and 3 β€’ One part is given, the other is added via drag & drop β€’ Correct? β†’ reward and progress β€’ Wrong? β†’ gentle feedback and repeat β€’ Only fast, correct answers (under 5 seconds) count as β€œknown by heart” MADE FOR CHILDREN – EVEN WITHOUT READING β€’ Intuitive operation with number tiles and structured quantity images (dice, fingers, dots, and more) β€’ Four child-friendly animal avatars: panda, dolphin, cat, dog β€’ Each correct task colors the avatar more β€’ Learning progress is always visible and motivating FOCUSED LEARNING INSTEAD OF A GAME APP β€’ Reduced sounds and calm, clear visuals β€’ No distracting effects, no flashy colors β€’ Clear didactic structure: not a game, but a real teaching and learning app PEDAGOGICALLY SOUND – RESEARCH-BASED β€’ Leitner learning system with spaced repetition (boxes 1–4) β€’ Didactic reduction: only meaningful decompositions, no swapped pairs, no zero β€’ Structured quantity images strengthen number sense and understanding β€’ Error-oriented learning: incorrect tasks are deliberately repeated β€’ Progress per avatar is transparent – also for parents and teachers SAFE AND AD-FREE β€’ No ads β€’ No in-app purchases β€’ Works offline – ideal for on the go β€’ 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

PsstBee2 screens
Number Decomposition4 screens

Verdict

The call

The clearest difference is update cadence: PsstBee at every 11 days against Number Decomposition's every 5 months. PsstBee also leads on price ($2.99 vs $3.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

PsstBee costs $2.99 and Number Decomposition $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PsstBee ships an update every 11 days, Number Decomposition every 5 months. The most recent releases landed on October 28, 2026 and October 12, 2026 respectively.

Scorecard2 real differences Β· 6 level
PsstBee versus Number Decomposition: the parameters behind the verdict, then further details
ParameterPsstBeeNumber Decomposition
Price$2.99 β€” better$3.99
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 11 days β€” betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 β€” better
Further details β€” not scored
Size8 MB78 MB
Age rating4+4+
DeveloperHENDRIK LANGLernwunder

In-app purchases

None

PsstBee

No in-app purchases

None

Number Decomposition

No in-app purchases

Questions

Is PsstBee free?
PsstBee costs $2.99, with no in-app purchases.
Is Number Decomposition free?
Number Decomposition costs $3.99, with no in-app purchases.
Do PsstBee or Number Decomposition have ads?
Neither PsstBee nor Number Decomposition shows ads.
Which is updated more often, PsstBee or Number Decomposition?
PsstBee ships an update every 11 days, and Number Decomposition every 5 months. Most recently, PsstBee was updated on October 28, 2026 and Number Decomposition on October 12, 2026.

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