# Prime Math vs Laddr

The clearest difference is update cadence: Laddr at every 3 weeks against Prime Math's every 3 months. Laddr also leads on iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Prime Math sells 3 in-app purchases, starting at $2.99 per 7 days and Laddr sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Prime Math ships an update every 3 months, Laddr every 3 weeks. The most recent releases landed on October 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Prime Math | Laddr |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 7 MB | 70 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Oluwatobi Omotayo](https://appshunter.io/developer/1606453205) | [LADDRCHESS LTD](https://appshunter.io/developer/6784258341) |

## What reviewers say

### Prime Math

[App page](https://appshunter.io/ios/app/prime-math-ai-math-solver/id6746931470)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $7.99 | per month |
| Yearly | $59.99 | per year |


### Laddr

[App page](https://appshunter.io/ios/app/laddr-improve-your-chess/id6784258339)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Laddr Premium Monthly | $9.99 | per month |
| Laddr Pro Monthly | $19.99 | per month |
| Laddr Premium Yearly | $109.99 | per year |
| Laddr Pro Yearly | $219.99 | per year |


## Frequently asked questions

### Is Prime Math free?

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

### Is Laddr free?

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

### Do Prime Math or Laddr have ads?

Neither Prime Math nor Laddr shows ads.

### Which is updated more often, Prime Math or Laddr?

Prime Math ships an update every 3 months, and Laddr every 3 weeks. Most recently, Prime Math was updated on October 8, 2026 and Laddr on September 29, 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.*