TrueLevel - Bubble Level Tool

Precision bubble level, angle finder & protractor - all in one app. Calibrate for accuracy. Free to start, Pro unlocks plumb mode & saved readings.

TrueLevel is the precision level tool, angle finder, and protractor your iPhone deserves. Use it as a bubble level to check any surface, an inclinometer to measure slope and pitch, or a spirit level for carpentry and DIY projects — all with a clean, beautifully crafted interface.

• BUBBLE LEVEL Place your iPhone on any surface to instantly see if it's level. The dual-axis bubble responds in real time with smooth animations and precise degree readouts.

• ANGLE FINDER & PROTRACTOR Measure any angle with a full 360° protractor display. Hold your device against a surface and read the exact angle — perfect for cutting, framing, or checking slope.

• PLUMB MODE (Pro) Check vertical alignment with a dedicated plumb bob display. Ideal for door frames, fences, and wall installations.

• SAVE & REVIEW READINGS (Pro) Lock any reading and save it for later. Review your measurement history and never lose an important reading again.

• PRECISION CALIBRATION Calibrate TrueLevel to your device for maximum accuracy. Simple two-step process ensures reliable measurements every time.

• HAPTIC FEEDBACK (Pro) Feel it when you hit level. Subtle haptic taps confirm when your surface reaches 0° or 90° — work without looking at the screen.

FREE FEATURES • Bubble level with real-time dual-axis display • Angle finder with full protractor readout • Clean, distraction-free interface • Device calibration

PRO UPGRADE — $3.99 ONE-TIME • Plumb mode for vertical alignment • Save and lock readings • Haptic feedback at level • Support independent development

BUILT FOR PROFESSIONALS & DIY TrueLevel is designed for carpenters, contractors, engineers, and anyone who needs a reliable clinometer in their pocket. No ads, no subscriptions, no internet required — just a fast, accurate leveling tool that works offline.

PRIVACY FIRST TrueLevel collects zero data. No analytics, no tracking, no account required. Your measurements stay on your device.

Requires iOS 17.6 or later.

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