OLL 16
The algorithm, how to recognise it and how to practise it without cheating.
Recommended algorithm
r U r' R U R' U' r U' r'10 moves
How to recognise it
A line through the left and right edges, plus the back-right corner. The front-right corner's yellow faces right.
Its inverse is another case
Do the 16 algorithm backwards, r U r' U R U' R' r U' r', and you are solving 7.
That's why CubeDojo never scrambles 16 that way: it builds a random state with the case fixed, so you practise 16 and not 7.
Practise 16 now
Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.