iPhone Screenshots


MONORAIL: a new logic puzzle for touch screens.

* 880 Puzzles
* Fosters development of visual/spacial reasoning skills
* Works great on iPad
* Simple to learn, challenging to master
* Puzzles range from easy to super-hard
* Designed by nerds, fun for all

Monorail is challenging and fun like sudoku, and entirely visual/spacial/geometric. There are no numbers or symbols. You solve puzzles by drawing rails to create a working monorail system.

The object of each puzzle is to create a single loop (closed path) of rails connecting all stations so the monorail can circle around endlessly.

Kindergartners can solve the beginner levels. Mathematicians from MIT have struggled to solve the most difficult ones.

Get on the Monorail train today!

We hope you enjoy.

-- IBA Puzzles (Glenn and Aaron Iba)

We welcome your feedback at ibapuzzles@gmail.com.

What's New

Version 1.3.1

FINALLY -- an update so Monorail will run in iOS11
[We heard your pleas and thank you for your past support]

All 3 puzzle packs (total of 880 puzzles) now completely free and unlocked!
This was the easiest way to do a quick update, and to make sure that previous paid users can still access all their puzzles. Thank you everybody for your past support.

The nasty "CLEAR button" crash is now fixed.

More reliable tapping on puzzle rails and scrolling menus.

Ratings and Reviews

3.9 out of 5

848 Ratings

848 Ratings

Monorail is a challenging find


My twin brother LOOOVES logic puzzles. You know, the ones with the boxes, where you have to find out which of four friends in a coffee shop had both a black coffee and a bagel while wearing a green sweatsuit, but he gets bored easily, so I decided to buy him an app on my phone he could use when we were both out together, at appointments or whatever. The problem is, I won't put it down long enough to let him play it! I figured, "We'll just do the free version", and a day later, I'd bought the full! These puzzles are RIDICULOUSLY frustrating, but once you FINALLY find the right answer, you want to keep doing more. Probably my favorite thing about games like this and Temple Run is that you can put it down, but you're always willing to pick it back up.

Wish I could give this ten stars!!!

Simple and Fun

SH in WI

An enjoyable set of puzzles. Simple, fun, and with a smooth interface that makes it easy to think about the puzzle and forget that you're drawing with your finger on a tiny screen.

The puzzles on a hex grid add a whole new dimension. It's like two games in one! It's also very nice that you can try before you buy. I bought the upgrade for more puzzles after only a few minutes. With the latest update they have added even more puzzle packs, for more replayability value. Definitely worth it.

The graphics seem fuzzy. I keep thinking I need new glasses, but it's just the way the graphics are. Maybe not designed for Retina Display. You can see this in the screenshots. Perhaps this will be updated in a later version.

Amazing, but...


I absolutely love this game! I'd completed the 50 free levels in one day! Now here's where the 'but' comes to play. Upon completing the free version, I wanted to purchase the full game, however. I wasn't 'allowed'. My in-app purchase is off, which means I should be successful in my attempts to purchase items when outside the app store. Why not just have the full version sold separately within the app store? If anything, I will continue to try because I really do like this game and the relaxation that goes alongside it! Good job people!!! lol :-)


Glenn Iba
12 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 IBA Puzzles
In-App Purchases
  2. Rectangle Puzzles $1.99
  3. Hexagon Puzzles $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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