for sure its Octofut! Last year i made in 3 Months millions of coins without a ban. Its Cloudbased so you can check it where ever you are on a pc.
i used Fmillionare a few years ago and got a ban after 4 days. no idea they are better now or not but Octofut wins :D
Here is my Ref link if you interessted
[Only registered and activated users can see links. Click Here To Register...]
This year i started after Webapp Release and made in 24 Hours 100k sadly i lost my account for using the draft bot and i have not an Webapp ready account right now :(