HamiLoop
The loop puzzle.
Only for iPhone
Free · In-App Purchases
iPhone
HamiLoop: Draw one loop. Pass through every square on the grid exactly once. That's the whole idea behind HamiLoop, and it's harder than it sounds. What looks like a simple rule turns into a real puzzle once the grid grows, and figuring out the right path can take real thought.
Grid sizes vary a lot, so difficulty varies with them. Some puzzles are solved in a couple of moments, others take much longer and require some careful planning. With 150,000 preloaded levels, you can pick a size and difficulty that suits your mood, and a new difficult puzzle is added every day if you're after something tougher. There are no timers and no countdowns anywhere in the app, so every puzzle can be worked through at your own pace.
Each puzzle is presented with clean, colorful visuals, though the colors are purely decorative and don't affect the solving itself. If you like tackling more than one thing at a time, you can keep several levels open in parallel, so an easier puzzle is always there when you want a break from a harder one. Alongside the daily challenge, an extra hard puzzle is released once a week for players looking for something tougher still. The core idea of the game is inspired by Hamiltonian cycles, a well known concept from graph theory, giving the puzzle a solid mathematical foundation beneath its simple rule.
Ratings & Reviews
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This update adds a new in-game tutorial, fresh visual touches, and bug fixes for a smoother experience.
The developer, Bastion Peak e.U., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Bastion Peak e.U.
- Size
- 13.1 MB
- Category
- Puzzle
- Compatibility
Requires iOS 18.2 or later.
- iPhone
Requires iOS 18.2 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
Advertising
- In-App Purchases
Yes
- 250 Hints USD 9.99
- 25 Hints USD 0.99
- 100 Hints USD 4.99
- 10 Hints USD 0.49
- Premium USD 4.99
- Copyright
- © 2026 Bastion Peak e.U.