# π ~PI~ vs 直感素数

The clearest difference is ads: π ~PI~ at none against 直感素数's shown. π ~PI~ also leads on review sentiment (100% vs 71%) and iOS requirement (8.0 vs 13.0). 直感素数's advantage is update cadence (weekly vs every 6 months). On price, in-app purchases and device support there is nothing between them.

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

π ~PI~ ships an update every 6 months, 直感素数 weekly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | π ~PI~ | 直感素数 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6461164718/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | **100.0% of reviews** | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | — |
| Size | 23 MB | 34 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Takeda](https://appshunter.io/developer/1021096508) | [Larry Works](https://appshunter.io/developer/1701632846) |

## 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


### 直感素数

[App page](https://appshunter.io/ios/app/id6461164718)

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

**In-app purchases:** none


## Frequently asked questions

### Is π ~PI~ free?

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

### Is 直感素数 free?

直感素数 is free to download, with no in-app purchases.

### Do π ~PI~ or 直感素数 have ads?

直感素数 shows ads; π ~PI~ does not.

### Which is updated more often, π ~PI~ or 直感素数?

π ~PI~ ships an update every 6 months, and 直感素数 weekly. Most recently, π ~PI~ was updated on November 6, 2026 and 直感素数 on November 3, 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.*