# PRIMO vs MathLock

The clearest difference is in-app purchases: PRIMO at none against MathLock's 2. PRIMO also leads on device support (3 vs 1) and iOS requirement (8.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. MathLock sells 2 in-app purchases, starting at $2.99 per 7 days. PRIMO asks for nothing beyond the download.

PRIMO ships an update every 3 weeks, MathLock fortnightly. The most recent releases landed on September 30, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PRIMO | MathLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mathlock-math-games-app-lock/id6780355702/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 63 MB | 41 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Kulebu Information Technology Co., Ltd](https://appshunter.io/developer/919809571) | [Hamid Mahmood Siddiqui](https://appshunter.io/developer/1880368904) |

## What reviewers say

### PRIMO

[App page](https://appshunter.io/ios/app/primo/id1424842142)

**Features:** macOS Compatibility

**In-app purchases:** none


### MathLock

[App page](https://appshunter.io/ios/app/mathlock-math-games-app-lock/id6780355702)

This app transforms screen time into educational math practice. It uses quick math games to unlock distracting apps, helping users reduce mindless scrolling and improve their math skills. Features adaptive difficulty and progress tracking.

**Highlights:** Math game app lock, Reduces distracting app usage, Five different math games, Adaptive difficulty levels, Streak tracking and XP, Emergency unlock option

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MathLock Pro | $2.99 | per 7 days |
| MathLock Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is PRIMO free?

PRIMO is free to download, with no in-app purchases.

### Is MathLock free?

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

### Do PRIMO or MathLock have ads?

Neither PRIMO nor MathLock shows ads.

### Which is updated more often, PRIMO or MathLock?

PRIMO ships an update every 3 weeks, and MathLock fortnightly. Most recently, PRIMO was updated on September 30, 2026 and MathLock on October 14, 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.*