# Remember 3.1415 vs π ~PI~

The clearest difference is in-app purchases: π ~PI~ at none against Remember 3.1415's 1. π ~PI~ also leads on update cadence (every 6 months vs every 64 months) and iOS requirement (8.0 vs 13.0). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Remember 3.1415 sells 1 one-off in-app purchase. π ~PI~ asks for nothing beyond the download.

Remember 3.1415 ships an update every 64 months, π ~PI~ every 6 months. The most recent releases landed on October 3, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Remember 3.1415 | π ~PI~ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/remember-31415/id985688958/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 64 months | **Every 6 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 23 MB |
| Requires iOS | 13.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杨军 朱](https://appshunter.io/developer/564474259) | [Yuki Takeda](https://appshunter.io/developer/1021096508) |

## What reviewers say

### Remember 3.1415

[App page](https://appshunter.io/ios/app/remember-31415/id985688958)

Challenge your math and logic skills with this game that tests your ability to recall digits of Pi. Compete against the clock in various timed modes or an endless challenge. AI provides helpful tips to improve your input speed and accuracy.

**Highlights:** Over 1 million digits of Pi, Multiple timed game modes, Endless challenge mode, AI-powered input tips, Game over on time or error

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy Pro Version | $0.99 | one-time |


### 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


## Frequently asked questions

### Is Remember 3.1415 free?

Remember 3.1415 is free to download, with in-app purchases available.

### Is π ~PI~ free?

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

### Do Remember 3.1415 or π ~PI~ have ads?

Neither Remember 3.1415 nor π ~PI~ shows ads.

### Which is updated more often, Remember 3.1415 or π ~PI~?

Remember 3.1415 ships an update every 64 months, and π ~PI~ every 6 months. Most recently, Remember 3.1415 was updated on October 3, 2026 and π ~PI~ on September 27, 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.*