# Learn Pi By Karina vs permutation group

The clearest difference is iOS requirement: Learn Pi By Karina at 11.4 against permutation group's 16.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Learn Pi By Karina | permutation group |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/learn-pi-by-karina/id1219552192/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | — |
| Monetization | Free | — |
| Size | 1 MB | 6 MB |
| Requires iOS | **11.4** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sanjay Grover MD, FACS](https://appshunter.io/developer/508941289) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Learn Pi By Karina

[App page](https://appshunter.io/ios/app/learn-pi-by-karina/id1219552192)

This app helps users memorize the digits of Pi by breaking them into smaller, manageable groups. It's inspired by a method used to prepare for Pi Day contests, making memorization more accessible. Features include a testing mode with a scoreboard to track progress.

**Highlights:** Breaks Pi digits into smaller groups, Inspired by contest preparation methods, Supports memorization of up to 10,000 digits, Testing mode with elapsed time scoreboard, Track typing speed for Pi digits

**In-app purchases:** none


### permutation group

[App page](https://appshunter.io/ios/app/permutation-group/id6757737753)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Learn Pi By Karina free?

Learn Pi By Karina is free to download, with no in-app purchases.

### Is permutation group free?

permutation group is free to download, with no in-app purchases.

### Do Learn Pi By Karina or permutation group have ads?

Neither Learn Pi By Karina nor permutation group shows ads.

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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.*