Exactly what I was looking for
UPD 2. After last upgrade “answer” button got kind of “slow”. Quite annoying after hours of practicing. UPD. too many repetitions of silly 100/10, 50/5, 60/10, 33/3, 44/11 problems in easy division. Thanks for the app. Well presented, good interface. I like that there are both ‘competitive’ and ‘calm’ practice modes. Extra thanks for the tips!