Bubble Level Pro vs TrueLevel Bubble Level

Turn your iPhone into a precision spirit level. Bubble Level Pro uses your device's built-in motion sensors to deliver accurate, real-time tilt and angle readings — whether you're hanging a picture frame, mounting a TV, leveling a shelf, or checking if a surface is truly flat. No ads. No internet required. Just a clean, professional tool that works anywhere. ▸ THREE PRECISION MODES • 2D Bubble Level — A classic circular level showing tilt in both pitch and roll. Perfect for surfaces, tables, and floors. • 1D Single-Axis Mode (Premium) — Hold your phone sideways against a shelf, picture frame, or window edge to align it horizontally with one-axis precision. • Surface Flatness Test (Premium) — Place your phone flat on any surface to instantly see if it's truly level, with strict tolerance and color-coded feedback. ▸ PROFESSIONAL TOOLS • Real-time pitch and roll readings down to 0.1 degree • Live bubble that responds to every micro-movement • Glow feedback when perfectly level • Manual calibration to zero out reference surfaces (Premium) • Angle lock to capture any angle and measure relative tilt (Premium) • Five premium color themes — Classic Green, Ocean Blue, Sunset Orange, Rose Pink, Violet Glow ▸ WHEN TO USE BUBBLE LEVEL PRO • Hanging picture frames and shelves perfectly straight • Mounting wall TVs and curtain rods • Leveling furniture, washing machines, and appliances • Checking if a workbench, table, or counter is flat • DIY projects, carpentry, and home renovation • Camping setups, photography tripods, and equipment alignment • Verifying the slope of ramps, drains, and surfaces ▸ WHY CHOOSE BUBBLE LEVEL PRO? • Zero ads — ever. We don't believe in interrupting your workflow. • Works fully offline — no internet, no tracking, no signups. • Privacy-first — sensor data never leaves your device. • Fast and lightweight — no clutter, no learning curve. • Premium one-time purchase — pay once, use forever. No subscriptions. ▸ PREMIUM UPGRADE Unlock the full toolkit with a single one-time purchase: • 1D single-axis precision mode • Surface flatness test mode • Manual calibration • Angle lock & relative measurement • Five exclusive color themes ▸ DISCLAIMER Bubble Level Pro is intended for general-purpose use, hobby projects, and DIY tasks. For professional construction, engineering, or safety-critical applications, please use a certified instrument. Accuracy depends on your device's sensor calibration. ▸ SUPPORT Questions, feedback, or feature requests? We'd love to hear from you. Reach out anytime — every email is read by a real person. Download Bubble Level Pro today and never hang another crooked frame. Privacy Policy: https://docs.google.com/document/d/1SvrzZ-esn5WL-Mtm9k_CU4FnCWhZVcFV0AgjnVKQTuI/edit?usp=drive_link Terms & Conditions: https://docs.google.com/document/d/16F2wzTrQNX5dEZpmea1Jqr7ZhadtXa5DJZQ24I4Qg4Y/edit?usp=drive_link

TrueLevel is a bubble level for your iPhone. Lay the phone on a shelf, a picture frame, a table or a washing machine and read how far it is from level in two ways at once: a bubble that drifts toward the high side, and pitch and roll in degrees, to one decimal place. The big number is the larger of the two tilts, with a short verdict beside it: Level, Almost, Slight tilt, Off or Steep. When the phone is within your tolerance, the bubble and the numbers turn green. WHAT YOU GET • Bubble level — a bullseye vial whose bubble moves toward the high side. • Pitch and roll — each axis has its own vial and its own reading in degrees. • Inclination — an optional third reading: the total angle away from flat. • Zero — tap Zero on any surface and the app shows tilt relative to it. Use it when a surface is not truly flat or a case makes the phone sit unevenly. The zero is remembered until you reset it. • Tolerance — choose how close counts as level: 0.2°, 0.5°, 1.0° or 2.0°. • Haptics — a tap when the phone settles into level. You can switch it off. • Angle log — capture a reading, name it (for example "Top shelf"), and find it later in the Log. Swipe a row to rename or delete it. Angles are shown in degrees, with the decimal separator of your region. The interface is in English, German, Spanish, French, Japanese, Korean, Portuguese (Brazil), Russian, Thai, Vietnamese and Simplified Chinese. FREE AND PRO The level, the pitch, roll and inclination readings, zero, tolerance and haptics are free. TrueLevel Pro, a one-time in-app purchase, unlocks saving readings to the Log. If your Log already has readings, you can keep adding to it without Pro. Unlock and Restore Purchase are in Settings. GOOD TO KNOW • Works in portrait on iPhone, using the phone's motion sensors. Accuracy depends on the sensors in your phone, so zero it on a surface you trust. • Motion is read only while the app is open on screen. • No account and no ads. The readings you save stay on your device; the purchase goes through the App Store.