Modstack: Programming Puzzle
Robot Code Logic Puzzles
Free · In-App Purchases
Tiny code puzzles. Stack Move, Turn, Mirror, and Repeat tiles, guide the robot, and beat par. Free chapter + Daily; $3.99 once unlocks all.
Modstack is a tactile programming puzzle about making big moves with a small
set of commands.
Place Move and Turn tiles into a program, stack modifiers to change what they
do, then run your machine. Watch the robot execute each step, learn from the
result, and compress your solution until it reaches par.
WHAT YOU GET
- 36 handcrafted campaign circuits across six chapters
- A gentle visual introduction to programs, repetition, and mirroring
- Ordered relays, switches, gates, and precision Expert Circuits
- A new Easy, Medium, and Hard Daily Circuit every day
- Layered hints that nudge without giving away the whole solution
- Offline play with progress stored on your device
- Purpose-built sound and haptic feedback
- No ads, no account, and no tracking
The Foundations chapter and Easy Daily are free. A single Full Game Unlock
opens the remaining 30 campaign circuits plus Medium and Hard Daily. There is
no subscription.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
- Added dedicated layouts for the open and closed screens of iPhone Duo.
- Readable controls and scrolling on the closed screen, with more room for your board and program when open.
- Your program stays in place as the screen changes.
- The familiar iPhone and iPad layouts are preserved.
The developer, NovoBuild LLC, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Novobuild LLC
- Size
- 32 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock Full Modstack $3.99
- Copyright
- © 2026 NovoBuild LLC
