Bubble Level vs Protractor Measuring Angle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bubble Level
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A bubble level, plumb bob and angle finder in one app — hold your phone against a wall, post or shelf and read the exact tilt in degrees, percent grade or roof pitch. Most level apps stop at a bubble sliding in a tube. PlumbLine adds the tool the trades actually reach for: a digital plumb bob that swings to the side a wall leans and snaps green at true vertical, a two-axis surface check that tells you which edge sits low, and a calibration step that cancels out a slightly bent case so every later reading is honest. WHAT YOU GET - Know instantly whether a wall, post or door jamb is truly vertical, not just "close enough" - Level a shelf, picture frame or rail on the first try instead of nudging and re-checking - See if a worktop, tile or table is flat on both axes, and exactly which edge to shim - Read any slope three ways — degrees, percent grade, or rise-in-12 roof pitch — with no math - Freeze a reading with Hold, so you can lower the phone and still see the number - Keep a timestamped log of every check, so you can prove what was true when you left the job PERFECT FOR - DIYers hanging frames, shelves, mirrors and curtain rails - Carpenters, tilers and finish trades checking jambs, studs and worktops - Homeowners setting fence posts, gates and decking - Anyone who wants a straight result without carrying a spirit level around WHY NOT JUST USE A POCKET SPIRIT LEVEL? A physical level tells you the bubble is "about" centred. PlumbLine gives you the number — 0.4 degrees of lean, low on the right — plus a pass or fail badge against a tolerance you set yourself, and a saved record afterwards. It is already in your pocket, and it never gets left in the van. PRIVACY Everything runs on the motion sensor already in your device. No account, no ads, no tracking, no internet connection needed. Your readings and saved log stay on your phone. FULL ACCESS PlumbLine Premium unlocks the full toolkit — plumb bob, spirit level, surface check, the angle finder with percent and roof-pitch units, fine calibration, and the saved measurement log. Choose a weekly plan, a yearly plan, or a one-time lifetime purchase. Restore Purchases is always available in Settings. Open PlumbLine, press a long edge of your phone flat against the next wall you were about to eyeball, and see how far off it really is. Not for surveying, aviation or safety-critical alignment. Readings are approximate. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? Contact tphuc.work@gmail.com
Protractor Measuring Angle
This app transforms your iPhone into a versatile digital measuring tool. It offers multiple functions to measure angles, slopes, distances, and even height using your device's sensors and camera. Save and review your measurement history for future reference.
- Inclinometer for real-time tilt measurement
- Screen protractor for precise angle reading
- Camera level with horizon overlay
- Photo angle measurement on existing images
- Height calculator using trigonometry
- AR Measure for 3D space measurements
- On-screen ruler and digital compass
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Protractor Measuring Angle turns your iPhone into a precise digital toolbox — measure any angle, slope, or distance in seconds. 8 TOOLS IN ONE APP ▸ Inclinometer Real-time tilt measurement using your device sensors. Edge mode reads walls and frames; Flat mode works face-up on surfaces. Tap Calibrate to zero any offset. Freeze the reading with one tap. ▸ Screen Protractor Drag two arms to any angle and read the value instantly. Perfect for blueprints, technical drawings, and any image that needs an exact angle. ▸ Camera Level Live camera with a horizon overlay line. Freeze the frame to capture and save the reading. ▸ Photo Angle Measure angles directly on photos from your library using the same drag-and-lock protractor. ▸ Height Calculator Point at the top of a tree, building, or mast. Enter the distance to its base and your eye height — the app computes the exact height using trigonometry. ▸ AR Measure Drop points in augmented reality to measure real-world distances and the angle between any three points in 3D space. ▸ On-Screen Ruler A calibrated ruler in centimeters or inches. Run calibration once and it stays precise on your device. ▸ Compass Digital compass with cardinal and intercardinal directions. FLEXIBLE UNITS Switch between degrees, radians, percent slope, and roof pitch (X:12) for angles. Length reads in cm, in, m, or ft. MEASUREMENT HISTORY Every saved reading is logged with a thumbnail, timestamp, and optional note. Review, edit, or share any past measurement. Works offline. No account needed. Privacy Policy - https://msrtech.net/apps/protractor-measuring/privacy.html Terms - https://msrtech.net/apps/protractor-measuring/terms.html EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Protractor Measuring Angle at none against Bubble Level's 3. Protractor Measuring Angle also leads on update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Bubble Level sells 3 in-app purchases, starting at $4.99 per 7 days. Protractor Measuring Angle asks for nothing beyond the download.
Bubble Level ships an update monthly, Protractor Measuring Angle every 2 days. The most recent releases landed on October 13, 2026 and October 18, 2026 respectively.
| Parameter | Bubble Level | Protractor Measuring Angle |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Phuc Pham | MSR TECH LLP |
In-app purchases
Bubble Level
- Bubble Gauge Weekly$4.997 Days
- Slope Finder Yearly$24.991 Year
- Angle Meter, Pay Once$49.99
Protractor Measuring Angle
No in-app purchases
Questions
Is Bubble Level free?
Is Protractor Measuring Angle free?
Do Bubble Level or Protractor Measuring Angle have ads?
Which is updated more often, Bubble Level or Protractor Measuring Angle?
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