Sharper measurements and a cleaner test flow. BALANCE The level dot now moves freely in every direction and starts centred whatever angle you hold the phone at, so keeping it on target genuinely reflects how steady you are. REACTION The go signal now fills the entire screen impossible to miss, impossible to tap outside. The prompts are larger, and your time now appears above the card instead of on top of it. TAP SPEED The ten-second window is now timed against the system clock, so every reading is measured over exactly ten seconds. ALSO Mileage now runs on iOS 18.0 and later. As always: your first test and your body-age number are free, and nothing you measure leaves your iPhone.