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Plumb: Spirit Level
by National Tool Works LLC
Description
Plumb is a precision spirit level built to feel like a real bubble level tool.
The bubble moves with genuine spring-damper physics. The bezel looks like machined rubber. The vial renders with real fluid optics. When you hit level, the screen flashes, a tone fires, and the phone vibrates — all at once, so you can feel it without looking.
LEVEL TAB
The main vial reads roll in portrait or landscape. Lock orientation from the toolbar — portrait, landscape left, landscape right, or auto. Lock a reading to free up your hands. Calibrate to any known flat surface with one tap.
SURFACE TAB
A bullseye level checks both axes simultaneously. Perfect for countertops, appliances, equipment, and anything that needs to be flat in every direction at once.
ANGLE TAB
Dial in any target angle — 45°, 22.5°, a custom pitch, or a grade percentage — and get live feedback as you approach it. Great for trim work, ramps, crown molding, roofing, and drainage slopes.
SIX DISPLAY MODES
Choose how angles are shown — degrees, percentage, mm/m, pitch (X.X:12), or in/ft. Each tab has its own independent display mode. Tap any readout to cycle through options.
WORKS EVERY WAY YOU HOLD IT
Portrait, landscape left, landscape right, face-up, face-down — Plumb reads correctly in every orientation automatically. No mode to switch, no setup required.
HOLD
Freeze any reading with one tap, one volume button press, or the Action button. Press again to release. A haptic confirms when hold is activated or released.
FEEDBACK THAT KEEPS UP WITH YOU
Tone — pitch rises as you approach level, fires a clean confirm when you hit it
Flash — the camera flash pulses on level, useful in dark spaces
Haptic — a firm tap through the phone the moment you're on target
NIGHT MODE
A dedicated all-black theme with deep red vial and glow ring. Designed for attics, crawl spaces, and low-light conditions where a bright yellow screen is a liability.
SIX THEMES
Yellow, Red, Black, Sky Blue, Orange, and Night mode.
CALIBRATION
Per-orientation calibration profiles. Calibrate portrait, landscape left, landscape right, and flat independently. Reset any profile individually or all at once.
NO ADS. NO ACCOUNT. NO TRACKING.
Plumb does one thing and does it right. Nothing phones home. Nothing asks for your email.
The bubble moves with genuine spring-damper physics. The bezel looks like machined rubber. The vial renders with real fluid optics. When you hit level, the screen flashes, a tone fires, and the phone vibrates — all at once, so you can feel it without looking.
LEVEL TAB
The main vial reads roll in portrait or landscape. Lock orientation from the toolbar — portrait, landscape left, landscape right, or auto. Lock a reading to free up your hands. Calibrate to any known flat surface with one tap.
SURFACE TAB
A bullseye level checks both axes simultaneously. Perfect for countertops, appliances, equipment, and anything that needs to be flat in every direction at once.
ANGLE TAB
Dial in any target angle — 45°, 22.5°, a custom pitch, or a grade percentage — and get live feedback as you approach it. Great for trim work, ramps, crown molding, roofing, and drainage slopes.
SIX DISPLAY MODES
Choose how angles are shown — degrees, percentage, mm/m, pitch (X.X:12), or in/ft. Each tab has its own independent display mode. Tap any readout to cycle through options.
WORKS EVERY WAY YOU HOLD IT
Portrait, landscape left, landscape right, face-up, face-down — Plumb reads correctly in every orientation automatically. No mode to switch, no setup required.
HOLD
Freeze any reading with one tap, one volume button press, or the Action button. Press again to release. A haptic confirms when hold is activated or released.
FEEDBACK THAT KEEPS UP WITH YOU
Tone — pitch rises as you approach level, fires a clean confirm when you hit it
Flash — the camera flash pulses on level, useful in dark spaces
Haptic — a firm tap through the phone the moment you're on target
NIGHT MODE
A dedicated all-black theme with deep red vial and glow ring. Designed for attics, crawl spaces, and low-light conditions where a bright yellow screen is a liability.
SIX THEMES
Yellow, Red, Black, Sky Blue, Orange, and Night mode.
CALIBRATION
Per-orientation calibration profiles. Calibrate portrait, landscape left, landscape right, and flat independently. Reset any profile individually or all at once.
NO ADS. NO ACCOUNT. NO TRACKING.
Plumb does one thing and does it right. Nothing phones home. Nothing asks for your email.
What's new (v1.0.1)
- Settings now persist when closing and reopening the app
- Volume buttons toggle Hold — press once to lock, press again to release
- Toggle display modes on the Level tab (degrees, percentage, mm/m, pitch, in/ft)
- Angle and Surface tabs have independent display modes
- Level orientation lock added to main toolbar
- Various display and settings improvements
- Volume buttons toggle Hold — press once to lock, press again to release
- Toggle display modes on the Level tab (degrees, percentage, mm/m, pitch, in/ft)
- Angle and Surface tabs have independent display modes
- Level orientation lock added to main toolbar
- Various display and settings improvements
