# Pi Brain vs pi!

The clearest difference is iOS requirement: Pi Brain at 6.0 against pi!'s 26.0. 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 | Pi Brain | pi! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (9 ratings)](https://appshunter.io/ios/app/pi-brain/id311957474/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 84.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Monetization | Free | — |
| Size | 3 MB | 4 MB |
| Requires iOS | **6.0** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Henry Chan](https://appshunter.io/developer/311957477) | [Sijun Yang](https://appshunter.io/developer/1819339978) |

## What reviewers say

### Pi Brain

[App page](https://appshunter.io/ios/app/pi-brain/id311957474)

Test and improve your ability to memorize digits of pi. Challenge yourself and friends to see who can recall the most numbers. This app serves as a fun learning tool for all ages to enhance memory retention.

**Highlights:** Memorize pi digits, Test memory recall, Score saving, Sort scores by date, name, or score, Friend contests, Learning tool

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Very user-friendly
- 🚀 Helps learn Pi digits quickly
- 🌟 Fun and engaging
- ✅ Works smoothly
- 💡 Great for memorization

**What reviewers complain about**

- 🐛 Buggy on newer iOS versions
- 🐛 Scrolling issues after 100 digits
- 🐛 Score history deleted on update
- 🐛 Keyboard blocks buttons
- 🐛 Can't save scores

**Reported bugs**

- Screen 'jumps' past ~100 digits
- Score history deleted on update
- Keyboard pops up and blocks buttons
- Cannot save scores
- App shuts down without saving score

**Requested features**

- Allow starting from any digit
- Option to not count '3' in row divisions
- Add a clear button on test page
- Practice mode for digits already mastered
- Levels based on digits learned


### pi!

[App page](https://appshunter.io/ios/app/pi/id6760577760)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pi Brain free?

Pi Brain is free to download, with no in-app purchases.

### Is pi! free?

pi! is free to download, with no in-app purchases.

### Do Pi Brain or pi! have ads?

Neither Pi Brain nor pi! 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.*