Most brain-training apps are one mechanic in 40 costumes. Evalu IQ is 24 genuinely different puzzles in one app: Sudoku, Kakuro, Nonogram, Logic Grid, Queens, Schulte, Block Fit, Cube Twist, Word Lock, Molecule Build, Logic Circuit and more.
Five hand-picked puzzles a day, the same five worldwide. One RQ score across seven skills, honest about being a practice metric and not an IQ test.
Free, works offline, no account needed. Family Mode: five profiles on one device.