# Understanding Math vs Atchoo!

The clearest difference is update cadence: Understanding Math at every 11 months against Atchoo!'s every 38 months. Understanding Math also leads on device support (3 vs 1) and iOS requirement (8.0 vs 12.0). Atchoo!'s advantage is price ($2.99 vs $3.99). On ads and in-app purchases there is nothing between them.

Understanding Math costs $3.99 and Atchoo! $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Understanding Math ships an update every 11 months, Atchoo! every 38 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Understanding Math | Atchoo! |
| --- | --- | --- |
| Price | $3.99 | **$2.99** |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 months** | Every 38 months |
| Monetization | Paid | — |
| Size | 37 MB | 91 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [appp media UG](https://appshunter.io/developer/739118031) | [Asuncion Munoz](https://appshunter.io/developer/1480525311) |

## What reviewers say

### Understanding Math

[App page](https://appshunter.io/ios/app/understanding-math/id970643203)

This app offers interactive games and exercises to help children understand and practice addition and subtraction up to 100. It features multiple user profiles, progress tracking, and a competitive duel mode for engaging learning.

**Highlights:** Unlimited user profiles, Track child's achievements, Addition and subtraction up to 100, Four different game settings, Interactive learning methods, Duel mode for competition

**Features:** macOS Compatibility

**In-app purchases:** none


### Atchoo!

[App page](https://appshunter.io/ios/app/atchoo/id980936278)

**In-app purchases:** none


## Frequently asked questions

### Is Understanding Math free?

Understanding Math costs $3.99, with no in-app purchases.

### Is Atchoo! free?

Atchoo! costs $2.99, with no in-app purchases.

### Do Understanding Math or Atchoo! have ads?

Neither Understanding Math nor Atchoo! shows ads.

### Which is updated more often, Understanding Math or Atchoo!?

Understanding Math ships an update every 11 months, and Atchoo! every 38 months. Most recently, Understanding Math was updated on October 10, 2026 and Atchoo! on October 2, 2026.

---

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