Bubble Level: Spirit Level

Bubble Level turns your phone into a pocket spirit level. Hanging a picture, putting up a shelf, checking a table or lining up a shelf bracket — the level tool shows a clear bubble and a live angle in one glance.

A machined vial sits at the center of the screen. Tilt the phone and the bubble drifts the way it does on a real spirit level. When the surface comes flat the bubble locks green and the phone can buzz to confirm it, so you do not have to squint at tiny lines.

WHAT YOU GET
• 2-axis bullseye bubble level for flat surfaces
• Single-axis tube levels for roll and pitch
• Angle finder with a live degree readout for pitch, roll and surface tilt
• Green in-level lock with optional haptic buzz
• Tap to freeze and hold a reading on screen
• Switch the readout between degrees and slope percentage
• Runs offline, with no account and no tracking
• Precision-instrument look with a high-visibility bubble

AROUND THE HOUSE AND THE WORKSHOP
Hanging pictures and mirrors straight • mounting shelves, TVs and curtain rails • checking floors, worktops and table legs • DIY, woodworking and carpentry • lining up a washing machine or fridge so it stops rocking • leveling a tripod, a camera or a projector • checking a caravan or camper before you settle in for the night

The accelerometer already in your phone does the work, so this leveling tool needs no special permissions and works anywhere, even with no signal.

BUBBLE LEVEL PRO
BUBBLE LEVEL — PRO SUBSCRIPTION
• Calibrate a custom zero on any reference surface
• Freeze and hold a reading without touching the screen again
• Extra machined vial themes
• Removes all ads

The bubble level, the tube levels and the angle readout all work fully without it.

ABOUT ACCURACY
Readings come from your phone's built-in accelerometer, so what you see depends on that sensor and on how flat the back of your phone or its case really is. Calibrating on a surface you trust helps a lot. It is a handy everyday level for home jobs, not a certified instrument: for structural, safety-critical or trade work, use a physical spirit level.

PRO SUBSCRIPTION
The core tools stay available without paying. Pro starts with a 7-day free trial, and ads keep showing during that trial. After it ends, the weekly subscription renews automatically and removes the ads. Cancel any time in Google Play.

If you already bought the Pro version, it stays yours for life, with no subscription.