# Index Unknown — Logic Puzzles

> Logic Puzzles (iPhone/iPad app by Sittu Canada Inc..)

- Source: https://appshunter.io/ios/app/index-unknown/id6801555409 (this page in markdown: same URL + `.md`)
- Developer: [Sittu Canada Inc.](https://appshunter.io/developer/1723863385)
- Category: Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 68 MB
- Languages: American English
- Released: 2026-08-21
- Data updated: 2026-10-10
- User reviews in markdown: https://appshunter.io/ios/app/index-unknown/id6801555409/reviews.md

## What is Index Unknown?

Venture into the unknown. Uncover the logic behind every puzzle.
• 50 individually designed puzzles
• Four difficulty collections with a steep rise in complexity
• Logic, spatial, visual, word, mathematical, and discovery-based challenges
• Little to no instructions
• No ads or time limits
• Playable offline

The first three collections contain 30 puzzles, ranging from approachable experiments to demanding multi-step challenges.
An optional in-app expansion pack unlocks the "Very Hard" collection consisting of 20 puzzles created for experienced solvers. This is not simply another step up. Its deepest challenges may take hours, days, or even longer to unravel.

Look closely. Test your assumptions. Find the rule that was there all along.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Expansion Pack - Very Hard | $4.99 | one-time |



## Version history (last 2 releases)

### 1.0.2 — 2026-08-27

Improved controls in various places.

### 1.0.1 — 2026-08-21

No release notes.

## More apps by Sittu Canada Inc.

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- [MortgageSim Pro](https://appshunter.io/ios/app/mortgagesim-pro/id6739637998)
- [MysticPointer](https://appshunter.io/ios/app/mysticpointer/id6756267991)
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All apps by Sittu Canada Inc.: https://appshunter.io/developer/1723863385

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-10.*