Quote Originally Posted by The Doctor View Post
Ufffff! My brain is ready to begin to boil after the whole day on the forum!!!
Did you understand = got you = gotcha = ты понял?
Yes and no. Gotcha is NOT ты понял. For "ты понял" you can use "got it?"

Gotcha is slang for "(I/he/she/they/we) got you", which means of course "(I/he/she/they/we) understood you".