# 3.14 Master Pi vs pi!

The clearest difference is in-app purchases: pi! at none against 3.14 Master Pi's 5. 3.14 Master Pi's advantage is iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. 3.14 Master Pi sells 5 one-off in-app purchases. pi! asks for nothing beyond the download.

## The numbers

| Metric | 3.14 Master Pi | pi! |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 47 MB | 4 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [David Brown](https://appshunter.io/developer/1848509879) | [Sijun Yang](https://appshunter.io/developer/1819339978) |

## What reviewers say

### 3.14 Master Pi

[App page](https://appshunter.io/ios/app/314-master-pi/id6754499094)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summation Supporter | $2.99 | one-time |
| Premium (Lifetime) | $4.99 | one-time |
| Radical Patron | $9.99 | one-time |
| Infinite Supporter | $29.99 | one-time |
| Pi Master | $99.99 | one-time |


### 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 3.14 Master Pi free?

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

### Is pi! free?

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

### Do 3.14 Master Pi or pi! have ads?

Neither 3.14 Master Pi 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.*