Spirit level

Key features

• Switches automatically between flat, vertical and horizontal modes based on the phone's position

• Augmented reality mode: overlay the bubble on the live camera feed

• Subtle vibration the instant the surface is level, no need to look at the screen

• Configurable 2.5° tolerance, ideal for everyday precision jobs

• Adjustable camera zoom to see the details of what you're lining up

Why use it?

• Hang a picture and feel the vibration when the frame is perfectly straight

• Overlay the bubble on the camera feed to check a shelf is flat without putting the phone down

• Check a piece of furniture is level in vertical mode, with the display flipping automatically

• Works offline

  Most tools work without an internet connection.

• No account

  No sign-up, no email address required.

• Free to download

  Every tool is free. A one-time “Zero Ads” purchase removes the ads.

More tools: Measurement & sensors

• Compass & nearby placesMagnetic heading plus a radar of places around you.
• Digital rulerCalibrated with a bank card, in centimetres and inches.
• ProtractorMeasure angles on the live camera with 3 draggable points.
• Sound meterNoise level in decibels on a 6-level colour gauge.