# GetPrincipia vs Geometry Tutor

The clearest difference is iOS requirement: GetPrincipia at 15.1 against Geometry Tutor's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. GetPrincipia sells 2 in-app purchases, starting at $6.99 per month and Geometry Tutor sells 2 in-app purchases, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.

GetPrincipia ships an update every 2 months, Geometry Tutor every 5 weeks. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | GetPrincipia | Geometry Tutor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/geometry-tutor/id6762062241/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 12 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Axiom 38 LLC](https://appshunter.io/developer/1887968723) | [JABA Learning LLC](https://appshunter.io/developer/1892700977) |

## What reviewers say

### 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 |


### Geometry Tutor

[App page](https://appshunter.io/ios/app/geometry-tutor/id6762062241)

Master geometry with an interactive, visual learning tool. Explore concepts on a dynamic canvas, visualize theorems in real-time, and solidify understanding with knowledge checks and practice problems. Offers a comprehensive curriculum for high school and advanced middle school students.

**Highlights:** Interactive learning canvas, Real-time theorem visualization, Comprehensive 6-unit curriculum, 120-question practice engine, End-of-unit knowledge checks, Instant feedback on mistakes

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Annual Access | $14.99 | per year |
| Geometry Tutor Premium | $14.99 | one-time |


## Frequently asked questions

### Is GetPrincipia free?

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

### Is Geometry Tutor free?

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

### Do GetPrincipia or Geometry Tutor have ads?

Neither GetPrincipia nor Geometry Tutor shows ads.

### Which is updated more often, GetPrincipia or Geometry Tutor?

GetPrincipia ships an update every 2 months, and Geometry Tutor every 5 weeks. Most recently, GetPrincipia was updated on October 2, 2026 and Geometry Tutor on October 15, 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.*