I typically get stuck around this point. I begin with penciling in which numbers pinky have two options per 3x3. If that dries up, I will try looking for numbers that can only go in one spot per row/column and squares that only allow 1 number.
Are there powerful techniques I'm skipping?
I like the simple style, which app is this?
It's called: Sudoku - Sudoku puzzels By Kidult Lovin
Hope you can find it like this
Found it, thanks!