# π ~PI~ vs Charadex

The clearest difference is in-app purchases: π ~PI~ at none against Charadex's 6. π ~PI~ also leads on ads (none vs shown) and iOS requirement (8.0 vs 17.0). Charadex's advantage is update cadence (weekly vs every 6 months). On price, review sentiment and device support there is nothing between them.

Both are free to download. Charadex sells 6 in-app purchases, starting at $6.99 per month. π ~PI~ asks for nothing beyond the download.

π ~PI~ ships an update every 6 months, Charadex weekly. The most recent releases landed on September 27, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | π ~PI~ | Charadex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/charadex/id6762883684/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 23 MB | 53 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuki Takeda](https://appshunter.io/developer/1021096508) | [Edwin Asuma](https://appshunter.io/developer/1895058544) |

## 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


### Charadex

[App page](https://appshunter.io/ios/app/charadex/id6762883684)

This app offers a modern take on charades with auto-recorded clips for easy sharing. It features three distinct game modes, including classic phone-to-forehead play, a real-time head-to-head competition, and a tournament-style elimination mode. Users can also create custom inside-joke decks for personalized gameplay.

**Highlights:** Auto-recorded viral moments, Three game modes: Classic, Head-to-Head, The Gauntlet, Custom inside-joke decks, Hundreds of themed packs, Instant shareable content, Tournament elimination mode

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $6.99 | per month |
| Premium Annual | $39.99 | per year |
| Donate - James | $4.99 | one-time |
| Donate - Dorothy | $14.99 | one-time |
| Donate - Maple Street | $29.99 | one-time |
| Donate - Ray | $49.99 | one-time |


## Frequently asked questions

### Is π ~PI~ free?

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

### Is Charadex free?

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

### Do π ~PI~ or Charadex have ads?

Charadex shows ads; π ~PI~ does not.

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

π ~PI~ ships an update every 6 months, and Charadex weekly. Most recently, π ~PI~ was updated on September 27, 2026 and Charadex on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*