# pi! vs Pi Sequence

The clearest difference is in-app purchases: pi! at none against Pi Sequence's 1. Pi Sequence's advantage is iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Pi Sequence sells 1 one-off in-app purchase. pi! asks for nothing beyond the download.

## The numbers

| Metric | pi! | Pi Sequence |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Size | 4 MB | 29 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sijun Yang](https://appshunter.io/developer/1819339978) | [晓灵 潘](https://appshunter.io/developer/6781908128) |

## What reviewers say

### pi!

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

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

**In-app purchases:** none


### Pi Sequence

[App page](https://appshunter.io/ios/app/pi-sequence-memorize-pi/id6783736734)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $3.99 | one-time |


## Frequently asked questions

### Is pi! free?

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

### Is Pi Sequence free?

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

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

Neither pi! nor Pi Sequence shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*