TrueLevel - Bubble Level Angle
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About this app
When a frame looks crooked, when you're mounting a shelf, when you're leveling furniture — the phone in your pocket becomes a precise spirit level.
TrueLevel is a level and angle app that uses your device's tilt sensor to measure level and angle to 0.1°. No complicated setup — measuring starts the moment you open it.
📐 Level
• Auto-switches to a 2-axis circular bubble when the phone lies flat, and a 1-axis bar when stood upright
• Manual selection of Auto / Flat / Bar modes
• Alerts you with sound and vibration when level is reached, so you don't even need to watch the screen
• Choose the level threshold (±0.1° / ±0.2° / ±0.5°)
📏 Angle
• Shows the absolute angle relative to horizontal
• Set a zero point to measure the relative angle between two surfaces
• Percent grade (%) display, handy for ramps and pipes
🛠 Calibration
• Quick calibration (1-point): place it on a flat surface and it's done in about 1 second
• Precise calibration (2-point): measure twice with the phone rotated 180° to cancel the sensor's own bias, staying accurate even on a tilted surface
✨ Convenience
• Hold: freeze the reading for easy checking
• Keep screen on, rotation lock
• Light / Dark / System theme
🔒 Privacy
• Uses only the tilt sensor. It does not request sensitive permissions such as location, camera, or contacts.
Recommended for
• Anyone installing frames, shelves, or curtain rails themselves
• Anyone wanting to level furniture, washing machines, or refrigerators
• Anyone needing to level a camping table or RV
• Anyone who enjoys DIY and self-decorating
※ Measurement accuracy may vary depending on your device's sensor performance and does not replace professional measuring instruments. Calibration before use is recommended.
TrueLevel is a level and angle app that uses your device's tilt sensor to measure level and angle to 0.1°. No complicated setup — measuring starts the moment you open it.
📐 Level
• Auto-switches to a 2-axis circular bubble when the phone lies flat, and a 1-axis bar when stood upright
• Manual selection of Auto / Flat / Bar modes
• Alerts you with sound and vibration when level is reached, so you don't even need to watch the screen
• Choose the level threshold (±0.1° / ±0.2° / ±0.5°)
📏 Angle
• Shows the absolute angle relative to horizontal
• Set a zero point to measure the relative angle between two surfaces
• Percent grade (%) display, handy for ramps and pipes
🛠 Calibration
• Quick calibration (1-point): place it on a flat surface and it's done in about 1 second
• Precise calibration (2-point): measure twice with the phone rotated 180° to cancel the sensor's own bias, staying accurate even on a tilted surface
✨ Convenience
• Hold: freeze the reading for easy checking
• Keep screen on, rotation lock
• Light / Dark / System theme
🔒 Privacy
• Uses only the tilt sensor. It does not request sensitive permissions such as location, camera, or contacts.
Recommended for
• Anyone installing frames, shelves, or curtain rails themselves
• Anyone wanting to level furniture, washing machines, or refrigerators
• Anyone needing to level a camping table or RV
• Anyone who enjoys DIY and self-decorating
※ Measurement accuracy may vary depending on your device's sensor performance and does not replace professional measuring instruments. Calibration before use is recommended.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
No data collected
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Data isn’t encrypted
