# 3.14 Master Pi vs Pi Deliberate

The clearest difference is in-app purchases: Pi Deliberate at none against 3.14 Master Pi's 5. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | 3.14 Master Pi | Pi Deliberate |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | — | Free |
| Size | 47 MB | 25 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Brown](https://appshunter.io/developer/1848509879) | [Byeongsoo Kim](https://appshunter.io/developer/1440292411) |

## 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 Deliberate

[App page](https://appshunter.io/ios/app/pi-deliberate/id6757496426)

This app uses memorizing digits of pi to train expertise through deliberate practice. It provides a valid environment, repetitions, and timely feedback to foster recognition, memory, and intuition.

**Highlights:** Memorize digits of pi, Deliberate practice training, Timely feedback on accuracy, Track progress based on mastery, Learn using chunking method, Develop recognition and memory

**Features:** macOS Compatibility

**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 Deliberate free?

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

### Do 3.14 Master Pi or Pi Deliberate have ads?

Neither 3.14 Master Pi nor Pi Deliberate 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.*