Plumb: Bubble Level & Angle
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Bubble level with big degree readout, flip calibration, hold, and level beep.
- Price
- Free
- No in-app purchases
- Updated
- Nov 13
- 2026 · v1.0.0
Screenshots
About Plumb: Bubble Level & Angle
Plumb is a precise bubble level and angle finder that stays out of your way. Lay your phone on a surface for a 360° bullseye level, or stand it on an edge to check shelves, frames, door posts and walls. The reading is big enough to see from a ladder.
WHY PLUMB
• No pop-up ads. One small banner sits below the controls and never covers the level.
• No permissions. No location, camera, microphone or storage access. No account.
• Calibration that fixes what reviewers complain about: measure, turn the phone around, measure again. That cancels sensor offset, a camera bump and a thick case in about ten seconds.
SURFACE MODE
• Bullseye bubble with 1°, 5° and 10° rings and your tolerance zone
• Total tilt in huge digits, plus separate left–right and top–bottom values
• Ideal for tables, appliances, washing machines, tripods, pool tables and aquariums
EDGE MODE
• Stand the phone on any of its four edges: Plumb detects the edge and turns the vial and readout so they stay upright
• Level and plumb checks for shelves, pictures, door frames, posts and tiles
• Tells you which end is low
HOLD, ZERO AND ALERTS
• Hold freezes the reading so you can read it after pulling the phone out of a tight spot
• Every held reading is kept with date and time, so you can note angles and look them up later
• Zero makes the current angle the reference, for matching a slope or measuring relative to an existing surface
• Optional beep and vibration the moment the reading is within your tolerance (±0.1°, ±0.25°, ±0.5° or ±1°)
UNITS AND COMFORT
• Degrees, percent slope or roof pitch (x/12)
• Steady or fast response
• Keeps the screen on while you measure
• Dark, high-contrast design that works with large text
• Available in 46 languages
Tips for accuracy: calibrate once per mode on a firm spot, remove a wobbly case for edge checks, and keep the phone still for a second before reading. A phone is not a certified measuring instrument; for critical work, confirm with a calibrated level.
Your settings, calibration and held readings stay on your phone.
WHY PLUMB
• No pop-up ads. One small banner sits below the controls and never covers the level.
• No permissions. No location, camera, microphone or storage access. No account.
• Calibration that fixes what reviewers complain about: measure, turn the phone around, measure again. That cancels sensor offset, a camera bump and a thick case in about ten seconds.
SURFACE MODE
• Bullseye bubble with 1°, 5° and 10° rings and your tolerance zone
• Total tilt in huge digits, plus separate left–right and top–bottom values
• Ideal for tables, appliances, washing machines, tripods, pool tables and aquariums
EDGE MODE
• Stand the phone on any of its four edges: Plumb detects the edge and turns the vial and readout so they stay upright
• Level and plumb checks for shelves, pictures, door frames, posts and tiles
• Tells you which end is low
HOLD, ZERO AND ALERTS
• Hold freezes the reading so you can read it after pulling the phone out of a tight spot
• Every held reading is kept with date and time, so you can note angles and look them up later
• Zero makes the current angle the reference, for matching a slope or measuring relative to an existing surface
• Optional beep and vibration the moment the reading is within your tolerance (±0.1°, ±0.25°, ±0.5° or ±1°)
UNITS AND COMFORT
• Degrees, percent slope or roof pitch (x/12)
• Steady or fast response
• Keeps the screen on while you measure
• Dark, high-contrast design that works with large text
• Available in 46 languages
Tips for accuracy: calibrate once per mode on a firm spot, remove a wobbly case for edge checks, and keep the phone still for a second before reading. A phone is not a certified measuring instrument; for critical work, confirm with a calibrated level.
Your settings, calibration and held readings stay on your phone.
What’s new
Version 1.0.0 · Updated November 13, 2026
First release: surface and edge level, big readout, two-step flip calibration, zero, hold with saved readings, and optional beep and vibration when level.