# tabDo! vs Number Decomposition

The clearest difference is review sentiment: Number Decomposition at 100% against tabDo!'s 83%. tabDo!'s advantage is iOS requirement (11.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

tabDo! ships an update every 6 months, Number Decomposition every 5 months. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | tabDo! | Number Decomposition |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Monetization | Paid | Paid |
| Size | 14 MB | 78 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Helbling Verlagsgesellschaft m.b.H](https://appshunter.io/developer/1069879136) | [Lernwunder](https://appshunter.io/developer/1840747082) |

## What reviewers say

### tabDo!

[App page](https://appshunter.io/ios/app/tabdo/id1488439711)

This app offers an innovative method for learning music fundamentals like notes and scales through interactive exercises on tablets. It helps children develop an ear for music by playing, modifying, and improvising melodies, progressing from basic motifs to chromatic scales and note reading.

**Highlights:** Develops audiation skills, Trains music listening competencies, Enhances individualized learning, Introduces musical notation, Promotes music-making, Multiple interactive functions

**Features:** Vision Pro support

**In-app purchases:** none


### Number Decomposition

[App page](https://appshunter.io/ios/app/number-decomposition-math/id6752735119)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is tabDo! free?

tabDo! costs $3.99, with no in-app purchases.

### Is Number Decomposition free?

Number Decomposition costs $3.99, with no in-app purchases.

### Do tabDo! or Number Decomposition have ads?

Neither tabDo! nor Number Decomposition shows ads.

### Which is updated more often, tabDo! or Number Decomposition?

tabDo! ships an update every 6 months, and Number Decomposition every 5 months. Most recently, tabDo! was updated on October 2, 2026 and Number Decomposition on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*