Game to play in rythme?

I play bass without a teacher since the beginning and I'm running out of ideas to teach me how to play in rythme. I mean I know rythme and I play the right one depending on songs ( I play piano since I am 6 yo) but I feel that maybe I come too early or too late for about a quarter of second or something ( I don't even know because I am not able to hear precisely what other bassists/drummers can hear in term of rythme). So I wanted to know if any of you knows a game or an app which make you train your rythme.