# π Pi Challenge vs Pi Deliberate

The clearest difference is in-app purchases: Pi Deliberate at none against π Pi Challenge's 1. Pi Deliberate also leads on ads (none vs shown). π Pi Challenge's advantage is iOS requirement (13.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. π Pi Challenge sells 1 in-app purchase, starting at $0.99 per month. Pi Deliberate asks for nothing beyond the download.

## The numbers

| Metric | π Pi Challenge | Pi Deliberate |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | — |
| Monetization | — | Free |
| Size | 73 MB | 25 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SIC Company Limited](https://appshunter.io/developer/1800842356) | [Byeongsoo Kim](https://appshunter.io/developer/1440292411) |

## What reviewers say

### π Pi Challenge

[App page](https://appshunter.io/ios/app/pi-challenge/id6756227034)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


### 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 π Pi Challenge free?

π Pi Challenge 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 π Pi Challenge or Pi Deliberate have ads?

π Pi Challenge shows ads; Pi Deliberate does not.

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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.*