Number Master: Run and merge

it's ok - a lot of ads. each level takes approximately 10 seconds to beat, and then you get an ad after each level. that part is really not fun. you can sometimes skip the ads after 10 seconds (so it's like you play for 10 seconds, watch an ad for 10 seconds, repeat) but other ads immediately open in the Playstore and you can't close them at all so you have to restart this app.

It's a fun free game with a normal amount of ads. The downside for me is that there's no home screen, so the only way to get a second chance on the same level is to die in purpose or close the app before it finishes. Also, each level has a different "perfect score," but there's no way of knowing what that is. For instance, a great run on one level might be 600, and on another level you might easily get 2,000. Other than that, this game is great for passing the time during mundane activities.

It's so fun! I got to a little after level 500 and maxed out on all the upgrades, so it's not as entertaining anymore, but it's still great. Would be cool if there was no limit to upgrades! It's very addicting and a good time waster! Also doesn't drain battery as much as other games. There are ads, but you can pay to have them removed. I didn't remove mine because they were for the most part after every other level, never twice in a row, and they could always be skipped after like 5 seconds. :))