A column of 3

Drop 7 is a nice looking tetris type of game about numbers. App store link

In this game there are two types of circles falling from the top into the grid: numbers from 1 to 7 and grey numberless circles. Tab a column to drop the circle on the top of the stack in that column. Let’s say you drop a 3. If the 3 ends up in a row or a column of 3 circles of any kind, it will disappear. A 5 will disappear if it lands in a row or a column of 5 circles and so on. The grey circles are locked. You unlock them if they are the direct neighbour of a circle that disappears. Unlock them twice and they will turn into ordinary circle with numbers.

A line of small white drops counts the amount of dropped circles. After 30 drops you reach the next level: a complete row of locked circles will push your circles one row up leaving you less space for playing.

This game looks great and simple and has a stimulating soundtrack (minimal classic percussion style). What I like best is that it focusses on the strategy because there is no time pressure involved. There is a special mode, in which you drop the same chain of circles again and again so you can optimize your strategy in a global highscore competition.

App store link, lite version and developer link: area/code