# π ~PI~ vs BrainPower Cognitive Activity

The clearest difference is in-app purchases: π ~PI~ at none against BrainPower Cognitive Activity's 5. π ~PI~ also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). BrainPower Cognitive Activity's advantage is update cadence (every 5 weeks vs every 6 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. BrainPower Cognitive Activity sells 5 in-app purchases, starting at $0.99 per month. π ~PI~ asks for nothing beyond the download.

π ~PI~ ships an update every 6 months, BrainPower Cognitive Activity every 5 weeks. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | π ~PI~ | BrainPower Cognitive Activity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (8 ratings)](https://appshunter.io/ios/app/brainpower-cognitive-activity/id6738306065/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 103 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Takeda](https://appshunter.io/developer/1021096508) | [Justin Scarborough](https://appshunter.io/developer/1780096762) |

## What reviewers say

### π ~PI~

[App page](https://appshunter.io/ios/app/pi/id1077740864)

Learn the digits of pi with engaging practice and challenge modes. Test your memory and see how many digits you can recall. Perfect for math enthusiasts and those looking to improve their memorization skills.

**Highlights:** Learn pi digits, Practice mode, Challenge mode, Memorize long sequences

**Features:** Vision Pro support

**In-app purchases:** none


### BrainPower Cognitive Activity

[App page](https://appshunter.io/ios/app/brainpower-cognitive-activity/id6738306065)

Engage in a word puzzle game designed to sharpen memory, attention, and focus. Compete in real-time challenges against players worldwide, earning rewards for top performance. Offers various difficulty levels and helpful power-ups for a dynamic brain training experience.

**Highlights:** Real-time competition mode, Word puzzle gameplay, Memory and focus improvement, Multiple difficulty levels, In-game power-ups, Daily rewards

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Elite Mode | $0.99 | per month |
| Pro Membership | $2.99 | per month |
| Brainwave Bundle | $0.99 | one-time |
| Memory Magic Bundle | $1.49 | one-time |
| Focus Fuel Bundle | $3.99 | one-time |


## Frequently asked questions

### Is π ~PI~ free?

π ~PI~ is free to download, with no in-app purchases.

### Is BrainPower Cognitive Activity free?

BrainPower Cognitive Activity is free to download, with in-app purchases available.

### Do π ~PI~ or BrainPower Cognitive Activity have ads?

BrainPower Cognitive Activity shows ads; π ~PI~ does not.

### Which is updated more often, π ~PI~ or BrainPower Cognitive Activity?

π ~PI~ ships an update every 6 months, and BrainPower Cognitive Activity every 5 weeks. Most recently, π ~PI~ was updated on October 13, 2026 and BrainPower Cognitive Activity on October 6, 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.*