# GetPrincipia vs Fluly

The clearest difference is update cadence: Fluly at every 2 weeks 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. GetPrincipia sells 2 in-app purchases, starting at $6.99 per month and Fluly sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

GetPrincipia ships an update every 2 months, Fluly every 2 weeks. The most recent releases landed on October 31, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | GetPrincipia | Fluly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 38 MB | 210 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Axiom 38 LLC](https://appshunter.io/developer/1887968723) | [Emmanuel Mambwe](https://appshunter.io/developer/1871602854) |

## 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 |


### Fluly

[App page](https://appshunter.io/ios/app/fluly-learn-a-language/id6772330879)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $9.99 | per month |
| 6 Months Premium | $19.99 | per 6 months |
| Lifetime Deal | $99.99 | one-time |


## Frequently asked questions

### Is GetPrincipia free?

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

### Is Fluly free?

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

### Do GetPrincipia or Fluly have ads?

Neither GetPrincipia nor Fluly shows ads.

### Which is updated more often, GetPrincipia or Fluly?

GetPrincipia ships an update every 2 months, and Fluly every 2 weeks. Most recently, GetPrincipia was updated on October 31, 2026 and Fluly on November 13, 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.*