Deleted

Hmm I don't have anything on my mind right now, I'll get back to you in case something crossed my mind. In the meantime, have a bump on me ^^

The only thing bumped into my mind is Duet. It may be fit "quick reaction" but I am not sure whether it is free on iOS or not.

xkcd
especially the what if section

I used to have an addon for Mozilla called StumbleUpon, which I see is also available as an iPhone application. It gives you random pages of whatever you are interested in, like educational posts, health tips, funnies and so on. You can discover a lot of interesting sites with it.

If you have a DS there was that Brain age game and Brain age 2, that were actually VERY good and very entertaining for an educational game, it does bring in math and logic.

I would suggest you emulate it to try and demo it to see if that is what you are looking for. But i would very much recommend it.

If not try to get into games that use numbers a lot, such as RPGs or pretty much any game that has damage and defensive components. Like idk, pokemon, MOBAs, War strategy games, and learn their number mechanics to the point where you can estimate or even bring a legiimate answer to how battles will outcome just by the numbers.

Also when you are satisfied with an answer, coudl u put it in your OP i would definitly be interested in what piqued ur interest. I too woudlnt mind something that could entertain and keep my mind going.

Bump!

FREE BUMP!

I've been playing Trivia Crack lately. It's brain simulating. ^.^

Multitask game should keep you amused for a while if you haven't played it before.

https://itunes.apple.com/us/app/duet/id634235735

Does this count?

Solve puzzles :D

If you like to keep your brain entertained with a logic puzzle then I cannot recommend Hexcells highly enough. It isn't free but the price is reasonable. The obvious connection would be "Hexagonal Minesweeper" but there is more to it than that. Every level is painstakingly crafted, and you can solve every level with logic alone. NEVER do you need a random guess.
If nothing else, it's a crash-course on learning-curve design for aspiring game-developers.

Link to steam store page:
http://store.steampowered.com/app/265890/
Would recommend the complete 3-game pack also listed on that page, Hexcells Plus and Hexcells Infinite are basically continuations of the game, as except for a few refreshers, they pick up the difficulty where the previous game left off. "Infinite" also contains a random-ish generated set of 10,000,000 puzzles, so should keep you busy for a bit.

And to think they're one-man projects, it's pretty impressive.

Bump!

This site might help. I've never used it, though.

Sadly, most puzzle sites I know and love are in Spanish.

I do the daily 3 activities on
Lumosity
and
Elevate
I believe they have paid versions that have extra features but the free ones are completely fine and challenging.

Take a look at this colossal blog

http://www.thisiscolossal.com/

Have you tried Sporcle? Trivia, quizzes & brain games.

EDIT: Try this Sporcle tester. Theres always 1 or 2 obvious country I miss...

http://www.folj.com/lateral/
Thanks for the train!

Duolinguo is good if you want to work on languages. You can practice one you don't use often or learn a new one!

Just chill, dude. Stop being so angsty and edgy, bruh. Calm your badonkadonk, sista. Stop rustling everybody's jimmies, brosky.

This might be the least funny thing I've ever written, and I wrote a lot of not funny shit.

If you want some good brain-training, try playing Brothers: A Tale of Two Sons. You control both brothers at once, one with your left hand, and one with your right.

Now try having the brother you control with the right hand on the left side of the screen, and vice-versa. O_o Oh my gosh, it's HARD! Whenever they changed sides, I had trouble getting them to even run in a straight line, much less jumping and maneuvering! ;D

As a bonus, it's absolutely a must-play game!

Bump.

agar.io

Casual multiplayer game, does require (not really that fast) reaction to stay alive.

For iOS: Quell Memento, Quell Reflect, Helsing's Fire, Nightmare Cooperative, The Room, Take it Easy, Bejeweled 3, 10000000, Triple Town, Might & Magic: Clash of Heroes, Letterpad, WELDER, Jetpack Joyride, Fruit Ninja, Space Invaders Infinity Gene, Robot Unicorn Attack, Canabalt, Fruit Ninja Puss in Boots, Big Bad Sudoku Book - hope you find something that works for you!