# π ~PI~ vs Word Gaps

The clearest difference is update cadence: π ~PI~ at every 6 months against Word Gaps's every 15 months. π ~PI~ also leads on iOS requirement (8.0 vs 13.0). On price, ads, 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, Word Gaps every 15 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | π ~PI~ | Word Gaps |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 15 months |
| Monetization | Free | — |
| Size | 23 MB | 96 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Yuki Takeda](https://appshunter.io/developer/1021096508) | [Hieu Hoang](https://appshunter.io/developer/1108291419) |

## 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


### Word Gaps

[App page](https://appshunter.io/ios/app/word-gaps/id6459739676)

**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 Word Gaps free?

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

### Do π ~PI~ or Word Gaps have ads?

Neither π ~PI~ nor Word Gaps shows ads.

### Which is updated more often, π ~PI~ or Word Gaps?

π ~PI~ ships an update every 6 months, and Word Gaps every 15 months. Most recently, π ~PI~ was updated on October 13, 2026 and Word Gaps on October 7, 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.*