# Rainbow Challenge App vs Math Lock

The clearest difference is in-app purchases: Rainbow Challenge App at none against Math Lock's 2. Rainbow Challenge App also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.6). Math Lock's advantage is update cadence (every 3 weeks vs every 32 months). On price and device support there is nothing between them.

Both are free to download. Math Lock sells 2 in-app purchases, starting at $2.99 per month. Rainbow Challenge App asks for nothing beyond the download.

Rainbow Challenge App ships an update every 32 months, Math Lock every 3 weeks. The most recent releases landed on October 7, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Rainbow Challenge App | Math Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/math-lock/id6748890228/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 32 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 118 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [TOLERANTISKO JAUNIMO ASOCIACIJA](https://appshunter.io/developer/1653302851) | [SPARKHIVE TECH LTD](https://appshunter.io/developer/1585011311) |

## What reviewers say

### Rainbow Challenge App

[App page](https://appshunter.io/ios/app/rainbow-challenge-app/id6444240926)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Lock

[App page](https://appshunter.io/ios/app/math-lock/id6748890228)

This app transforms screen time into a learning opportunity for children aged 4-15. It requires solving math problems to unlock the device and offers guided practice, a private tutor, and brain training exercises. Parents can manage screen time while children engage with a fun, curriculum-based math experience.

**Highlights:** Math challenges to unlock device, Curriculum-based math for ages 4-15, Personalized questions by level, Private Tutor with photo solving, Brain training activities, Parental controls

**Features:** macOS Compatibility, Family Sharing, Apple Wallet, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Lock Premium | $2.99 | per month |
| Math Lock Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Rainbow Challenge App free?

Rainbow Challenge App is free to download, with no in-app purchases.

### Is Math Lock free?

Math Lock is free to download, with in-app purchases available.

### Do Rainbow Challenge App or Math Lock have ads?

Math Lock shows ads; Rainbow Challenge App does not.

### Which is updated more often, Rainbow Challenge App or Math Lock?

Rainbow Challenge App ships an update every 32 months, and Math Lock every 3 weeks. Most recently, Rainbow Challenge App was updated on October 7, 2026 and Math Lock on September 26, 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.*