# Trainor Apave vs Math Key

The clearest difference is price: Trainor Apave at Free against Math Key's $1.99. Trainor Apave also leads on iOS requirement (15.5 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Trainor Apave is free to download; Math Key costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 22, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Trainor Apave | Math Key |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 41 MB | 1 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trainor](https://appshunter.io/developer/1330902636) | [1STGROUP PRIVATE LIMITED](https://appshunter.io/developer/6773183984) |

## What reviewers say

### Trainor Apave

[App page](https://appshunter.io/ios/app/trainor-apave/id6745693344)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Key

[App page](https://appshunter.io/ios/app/math-key/id6790252476)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trainor Apave free?

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

### Is Math Key free?

Math Key costs $1.99, with no in-app purchases.

### Do Trainor Apave or Math Key have ads?

Neither Trainor Apave nor Math Key shows ads.

### Which is updated more often, Trainor Apave or Math Key?

Trainor Apave ships an update every 3 weeks, and Math Key every 3 weeks. Most recently, Trainor Apave was updated on October 22, 2026 and Math Key on October 28, 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.*