Smart Level Tool: Bubble Level Live

Smart Level Tool turns your phone into a bubble level using its motion sensor (accelerometer). • Surface: a bullseye level for tabletops, shelves and floors, with a live reading for both axes. • Edge: a single-axis level for a phone stood on its edge, for checking a wall, frame or post — tells you when it is plumb (vertical) or level (horizontal). • Choose your units: degrees, percent grade, millimetres per metre, or roof pitch. • Zero the reading on a reference surface, or use a two-point zero to cancel the surface's own slope. Save a zero as a named profile to reuse it. • Hold a reading, name it and save it. Set a saved reading as a target to match a second surface or wall to the first, within your chosen tolerance. • The phone vibrates once when level (you can turn this off), or play a tone instead. • Set your own level tolerance and choose a Balanced or Responsive sensor rate. • Light and dark themes. Portrait, landscape and tablet layouts. Good to know • Accuracy depends on your phone's own sensor and shape: a case or a camera bump can tilt it. Zero the app on a surface you know is level, and check against a physical spirit level for work that must be exact. • No account is needed. Readings, zero settings and saved items stay on your phone. • Works without an internet connection.