# AhaMath vs GetPrincipia

The clearest difference is price: GetPrincipia at Free against AhaMath's $0.99. AhaMath's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

GetPrincipia is free to download; AhaMath costs $0.99 up front. GetPrincipia sells 2 in-app purchases, starting at $6.99 per month. AhaMath asks for nothing beyond the download.

## The numbers

| Metric | AhaMath | GetPrincipia |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 28 MB | 38 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EOIN J TOLSTER](https://appshunter.io/developer/1867338583) | [Axiom 38 LLC](https://appshunter.io/developer/1887968723) |

## What reviewers say

### AhaMath

[App page](https://appshunter.io/ios/app/ahamath/id6760379428)

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

**In-app purchases:** none


### GetPrincipia

[App page](https://appshunter.io/ios/app/getprincipia/id6761139348)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $6.99 | per month |
| Annual | $44.99 | per year |


## Frequently asked questions

### Is AhaMath free?

AhaMath costs $0.99, with no in-app purchases.

### Is GetPrincipia free?

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

### Do AhaMath or GetPrincipia have ads?

Neither AhaMath nor GetPrincipia shows ads.

---

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