TalentJR apps
Goal: Finish the first layer when corners are twisted in place or stuck in the wrong spot. 4 tasks · ★★★ = fewest moves.
The corner is in its place but twisted. Repeat R U R' U' until white is at the bottom.
Your cube, unfolded
Goal
Algorithm
Keyboard: U D L R F B turn a face, with Shift for the prime (U'). Y turns the whole cube. Backspace undoes.
A white corner that is in the bottom but wrong: hold it at the front-right and do R U R' U' once to lift it to the top. Then line it up and use the trick again. For the front-left spot, use the mirror: L' U' L U.
A corner in its place but twisted gets fixed by repeating R U R' U' (2 or 4 times). A corner in the wrong place at the bottom is lifted out with the same trick, then put in like any other corner. On the left side, the mirror trick L' U' L U does the same job.
Algorithm: R U R' U' · L' U' L U
Chapter 3 — The white corners: One four-move trick puts every white corner in its place and finishes the first layer.