# Einstein Challenge vs 100 / 4 Logic Games

The clearest difference is price: 100 / 4 Logic Games at Free against Einstein Challenge's $0.99. 100 / 4 Logic Games also leads on update cadence (every 10 days vs every 39 months) and iOS requirement (8.1 vs 17.0). On in-app purchases and device support there is nothing between them.

100 / 4 Logic Games is free to download; Einstein Challenge costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Einstein Challenge ships an update every 39 months, 100 / 4 Logic Games every 10 days. Both last shipped on November 3, 2026.

## The numbers

| Metric | Einstein Challenge | 100 / 4 Logic Games |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.6 (51 ratings)](https://appshunter.io/ios/app/100-4-logic-games/id1629629068/reviews)** |
| Number of ratings | — | **51** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 39 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 9 MB | 99 MB |
| Requires iOS | 17.0 | **8.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Joao Silva](https://appshunter.io/developer/1293675690) | [Andrea Sabbatini](https://appshunter.io/developer/493868276) |

## What reviewers say

### Einstein Challenge

[App page](https://appshunter.io/ios/app/einstein-challenge/id1293675691)

**Features:** macOS Compatibility

**In-app purchases:** none


### 100 / 4 Logic Games

[App page](https://appshunter.io/ios/app/100-4-logic-games/id1629629068)

Engage your mind with a collection of logic puzzles designed to be more entertaining than traditional Sudoku. This app offers a variety of brain-teasing challenges perfect for passing the time and providing mental stimulation.

**Highlights:** Multiple logic puzzle games, Mental exercise, Variety of challenges, Ideal for spare time, Growing game library

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

**In-app purchases:** none


## Frequently asked questions

### Is Einstein Challenge free?

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

### Is 100 / 4 Logic Games free?

100 / 4 Logic Games is free to download, with no in-app purchases.

### Which is updated more often, Einstein Challenge or 100 / 4 Logic Games?

Einstein Challenge ships an update every 39 months, and 100 / 4 Logic Games every 10 days. Most recently, Einstein Challenge was updated on November 3, 2026 and 100 / 4 Logic Games 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.*