Crazy good 5/5
This app needs an update! It will not work with iOS 11!
Great game. Very challenging.
Great app!! 5/5
I love this app but it needs many more levels. I have finished all the levels and I am hungry for more!!
Great game 5/5
I like this game , good for mind exercise. True!
Crazy Formula 5/5
Fun and challenging.
Lovely break 5/5
Good to play when don't have much time for more elaborate games
Fun little puzzler 4/5
At first it seems pretty simple. That's just the game teaching you the mechanics. When you get to 4th/5th books the difficulty changed really quickly and ramps up. I've had a couple that I stopped and scratched my head with. Pretty neat little game.
One of the best I've played! 5/5
By Brandon Regard
If you like puzzle games, this for you...
Crazy formulas 5/5
Very Addictive 5/5
By Hamidreza Mehrban
very goooood game
Good game 3/5
By El guy 321
3 stars because it does not give you hints when you get stuck
Done it before not bad not not great
Fun and addictive 5/5
I love it!
Fun puzzle game 5/5
Enjoyable and fun to play. Seems like it's good exercise for one's brain. At least that's how I rationalize playing it!
Only problem is I have run out of levels to play!!!
Really like game, good controls and straight forward explanations but larger/ more levels would be good- or even make/ share levels
Loads of fun...! 5/5
I think the "---For Brainiacs Only---" tags on this and the other related apps are just a sales ploy.
I'm a big dummy from way back and I've thoroughly enjoy this app! Just a few of the more difficult puzzles left to tackle...
Addicting, wonderful game 5/5
I love this game....
I've already reseted the game 5 times, and I'm waiting for new levels for 1 year so far! totaly worth it
its fun and i just couldnt get away. its not really addicting just some people think it is. it depends on who you are. my Q 4 u: how many levals are there? is this a gane that doesnt let me waste my money?❓❔😒😳😧😦😕😯😶😐😮
Fun & challenging 5/5
Entertaining game and offers a good challenge at higher levels.
It's so fun;) 5/5
I like playing this game:D
Addicting.....tons of fun..challenging.
Really addictive and fun!
formula fun 3/5
alternates between easy and challenging, always engaging and fresh. runs well, no problems.
By Will Beaton
I like it.
Great addictive game. Once I started playing it, I couldn't put it down. Love the fact that you can reset the game once you've completed all the levels. Wish they'd come out with more.
Love this game. 5/5
One of the best free apps to download. Very challenging and fun to play. A must if you are looking for a free app.
I love it! 5/5
It's a really good puzzle game that I really enjoyed
I hate it 1/5
I hate it
Fun game 4/5
By Tripper of toes
makes you think as you advance.
Problem Solving 5/5
This app provides a challenging exercise in problem solving and pattern recognition at the higher levels. It is also fun.
Crazy Formula 5/5
I think it is a great game.
Miss M : P 5/5
Never bored ! Fun & entertaining !!
Crazy formula 5/5
By FPB Metro
Great brain teaser! Keeps the mind sharp and focused.
I love this app. Need more levels though!
Quite Fun 5/5
Difficult at times but always with a logical solution. Downloaded over a year ago and I still pick it up to play from time to time
Fun, kinda hard to progress... 5/5
Fun time, great time waster. Sometimes it would be nice if you could earn points toward special pieces or hints....
Fun - hard at end 4/5
Fun, got hard near the end. Good use of logic brain.
By Mr. Doctorfantastic
Needs work! 2/5
By Home at last
Some of the puzzles seem to have no solution. Needs tutorials, hints, and help.
Crazy formula 5/5
By UFO alien 356
Good game of getting a puzzle and send chemicals through pipes to test tubes
Fun and quite challenging 5/5
Little brother and I love it. Levels get really hard really fast though.
Great game 4/5
Picks your brain