# Pi 100 Challenge vs 5th Invention

The clearest difference is price: 5th Invention at Free against Pi 100 Challenge's $0.99. 5th Invention also leads on iOS requirement (13.0 vs 17.0). Pi 100 Challenge's advantage is in-app purchases (none vs 12) and ads (none vs shown). On device support there is nothing between them.

5th Invention is free to download; Pi 100 Challenge costs $0.99 up front. 5th Invention sells 12 in-app purchases, starting at $19.99 per month. Pi 100 Challenge asks for nothing beyond the download.

## The numbers

| Metric | Pi 100 Challenge | 5th Invention |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/5th-invention/id6503144623/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | — |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 875 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ram Rao](https://appshunter.io/developer/1724828937) | [Zplay (Beijing) Info. Tech. Co.,Ltd.](https://appshunter.io/developer/531022725) |

## What reviewers say

### Pi 100 Challenge

[App page](https://appshunter.io/ios/app/pi-100-challenge/id6475694538)

**In-app purchases:** none


### 5th Invention

[App page](https://appshunter.io/ios/app/5th-invention/id6503144623)

Engage your spatial reasoning with this award-winning puzzle game inspired by traditional Chinese wood joinery. Solve intricate challenges, learn about cultural history, and unleash your creativity by designing and sharing your own puzzles.

**Highlights:** Spatial reasoning puzzles, Inspired by Chinese wood joinery, Learn through play and history, Design and share custom puzzles, Award-winning game design, 360-degree view of joints

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Practice Subscription Monthly | $19.99 | per month |
| DLC.Papa's Carpenter's House | $0.99 | one-time |
| Ochre | $1.99 | one-time |
| Master Expansion Pack | $2.99 | one-time |
| Elm | $2.99 | one-time |
| Beige | $3.99 | one-time |
| Green | $4.99 | one-time |
| Black walnut | $4.99 | one-time |
| Zitan Wood | $5.99 | one-time |
| Indigo | $6.99 | one-time |
| Rosewood | $8.99 | one-time |
| Texture Collection | $18.99 | one-time |


## Frequently asked questions

### Is Pi 100 Challenge free?

Pi 100 Challenge costs $0.99, with no in-app purchases.

### Is 5th Invention free?

5th Invention is free to download, with in-app purchases available.

### Do Pi 100 Challenge or 5th Invention have ads?

5th Invention shows ads; Pi 100 Challenge does not.

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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.*