This app was mentioned in 2 comments, with an average of 1.50 upvotes
Sharp Minds is a puzzle game - already published and completely free (no ads, no in-app purchases) on Android and iOS
It's a number puzzle game with several hundred levels which get progressively more difficult. It revolves around simple addition with mechanics and special powers later on that makes for some really challenging puzzles. It is targeted at players who like thinking and problem solving (think 2048/Threes genre, but different mechanics, more variety and more difficult)
There is a global leaderboard (separate for each platform) so players can compare scores.
Entire chapter 1 should be considered tutorial, while really challenging puzzles start at chapter 4 or 5.
Since I'm planning on updating the game regularly, I'd appreciate some feedback from fellow developers!
Thank you!