# Karate Math Dojo vs GetPrincipia

The clearest difference is update cadence: Karate Math Dojo at monthly against GetPrincipia's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Karate Math Dojo sells 1 one-off in-app purchase and GetPrincipia sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Karate Math Dojo ships an update monthly, GetPrincipia every 2 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Karate Math Dojo | GetPrincipia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/karate-math-dojo/id6476067970/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | — |
| Size | 46 MB | 38 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Pangaea Learning](https://appshunter.io/developer/1049407299) | [Axiom 38 LLC](https://appshunter.io/developer/1887968723) |

## What reviewers say

### Karate Math Dojo

[App page](https://appshunter.io/ios/app/karate-math-dojo/id6476067970)

Learn elementary arithmetic through engaging 2D fighter action. Master addition, subtraction, multiplication, division, and fractions with a legendary karate teacher. Progress through a curriculum designed for K-5 students, facing challenges like ninjas and pirates.

**Highlights:** Arithmetic practice (K-5 curriculum), 2D fighter action gameplay, Progressive lesson plan, Addition, subtraction, multiplication, division, Fraction lessons, Tournaments and sparring

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro-Player Access | $12.99 | one-time |


### 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 Karate Math Dojo free?

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

### Is GetPrincipia free?

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

### Do Karate Math Dojo or GetPrincipia have ads?

Neither Karate Math Dojo nor GetPrincipia shows ads.

### Which is updated more often, Karate Math Dojo or GetPrincipia?

Karate Math Dojo ships an update monthly, and GetPrincipia every 2 months. Most recently, Karate Math Dojo was updated on October 20, 2026 and GetPrincipia on October 24, 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.*