# Pi vs CathChat

The clearest difference is ads: CathChat at none against Pi's shown. Pi's advantage is update cadence (every 10 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Pi ships an update every 10 days, CathChat monthly. The most recent releases landed on October 7, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Pi | CathChat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (34 ratings)](https://appshunter.io/ios/app/pi-squared/id6737175718/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Monthly |
| Monetization | Ad-supported | — |
| Size | 89 MB | 126 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Carr](https://appshunter.io/developer/1775086517) | [Vincent Capo](https://appshunter.io/developer/6778112201) |

## What reviewers say

### Pi

[App page](https://appshunter.io/ios/app/pi-squared/id6737175718)

Engage in quick math challenges and compete with friends to improve your skills. This app transforms math learning into an exciting game, making it fun and accessible for all ages. Swap mindless scrolling for brain-boosting battles and enjoy a positive learning environment.

**Highlights:** Time-pressured math quizzes, Leaderboard competition, Daily math challenges, Smarter screen time alternative, Positive reinforcement messages, Math skill improvement

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent math tool
- 👍 Fun and engaging
- 👍 Intuitive and easy to navigate
- 👍 Great for learning and practice
- 👍 Wakes up the brain


### CathChat

[App page](https://appshunter.io/ios/app/cathchat/id6778112199)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Pi free?

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

### Is CathChat free?

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

### Do Pi or CathChat have ads?

Pi shows ads; CathChat does not.

### Which is updated more often, Pi or CathChat?

Pi ships an update every 10 days, and CathChat monthly. Most recently, Pi was updated on October 7, 2026 and CathChat on September 25, 2026.

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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.*