OLL 6
The algorithm, how to recognise it and how to practise it without cheating.
Recommended algorithm
r U2 R' U' R U' r'7 moves
How to recognise it
A yellow 2×2 square on top. Hold it at back right: the back side shows no yellow.
Its inverse is another case
Do the 6 algorithm backwards, r U R' U R U2 r', and you are solving 7.
That's why CubeDojo never scrambles 6 that way: it builds a random state with the case fixed, so you practise 6 and not 7.
Practise 6 now
Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.