# Protractor & Bubble Level PRO — Measure Angles - Ruler Compass > A professional multi-tool app for precise measurements on iPhone and iPad. (iPhone/iPad app by Jens Rieckhof.) - Source: https://appshunter.io/ios/app/protractor-and-bubble-level-pro/id1490701619 (this page in markdown: same URL + `.md`) - Developer: [Jens Rieckhof](https://appshunter.io/developer/354266124) - Category: Productivity, Utilities - Price: $2.99 - Rating: 3.00/5 from 4 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.6 · 15 MB - Languages: American English, French (France), German (Germany), Hindi, Italian, Japanese, Norwegian Bokmål, European Portuguese, Russian, Chinese (Simplified, China) and 2 more - Released: 2019-12-10 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/protractor-and-bubble-level-pro/id1490701619/reviews.md ## What is Protractor & Bubble Level PRO? Multitool is the toolbox with the most precise and essential tools for your iPhone or iPad! 10 Super-accurate Professional Measurement Tools: All in one app – The toolbox ready for your project! Measure angles, distances, frequencies, areas, air pressure, and much more! Inclinometer + Level • 360° angle measurement - Accurate to 0.1° • Angle storage for any number of values • Overlay the camera image as a background • Audio signals for angle difference (target angle or level) • AirPrint and email function for lists of saved angles • Manual display rotation by 180° • Leveling tool with audio signals (plumb bob) • Automatic switch between inclinometer and leveling tool • Levels for 90°/180°/270°/360° or target angles • Use the built-in flashlight to measure in low-light environments • 6-step calibration assistant Plumb Bob / Leveling Tool • With the leveling tool, you align horizontal surfaces along both axes. The deviation from horizontal is displayed in degrees for both axes. • The app provides you with all the useful functions on one screen. Endless Ruler • Whether it's iPhone 14, 11, or iPad Pro - the measurement is always accurate. • Choose between measurements in centimeters (cm) or inches (inch). • The entire ruler can be moved to measure lengths wider than your screen. Compass • Use the inclinometer display, controlled by your phone's compass this time. You can also save individual values here and use them as reference angles. Barometer/GPS Altimeter • With our app, you always have a barometer and altimeter with you. • The barometer displays the pressure measured by your mobile device in two different units. With the altimeter, you can record altitude differences and view the history in a clear chart. This way, you can record the elevation gained during hikes or bike rides. • The app now also shows GPS altitude and accuracy. Audiometer • With the audiometer, you can measure frequency responses and volumes across the entire audible spectrum. 3D Camera Measurement • Measure individual objects in the room using your camera. Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - 360° angle measurement - Leveling tool with audio signals - Endless ruler with cm/inch options - Compass with inclinometer display - Barometer and GPS altimeter - Audiometer for frequency and volume - 3D camera measurement ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/protractor-and-bubble-level-pro/id1490701619/reviews.md ### 1/5 — Not impressed *2021-06-29* I have the Angle Measure Tool and I thought this one could be better as it claims to have 8 tools. First open, I see 6 tool buttons, one of then redirect to a website. This was the first disappointment, the ads for a paid app. Then one tool, acoustic db levels hat buttons in German language and did not even work. Also the app itself has graphic issues with buttons too big, compared to the other tool. I would like to keep it but those, especially the ads or the link, are deal breaker. Very disappointed. **Developer response:** Dear Bernd, thank you for your honest feedback. Regarding the 8 tools, they are: - Clinometer - Spirit level - Compass - Surface level - Ruler - Altimeter (GPS/Baro) - Audiometer - LED We‘ll investigate the other points that you mentioned. JRSoftWorx-Team ## Frequently asked questions about Protractor & Bubble Level PRO ### What is the price of Protractor & Bubble Level PRO? Protractor & Bubble Level PRO is a paid app priced at $2.99. This one-time purchase grants access to all its professional measurement tools. ### Does Protractor & Bubble Level PRO have ads? No, Protractor & Bubble Level PRO is ad-free. Users can enjoy all its features without any advertisements interrupting their workflow. ### What devices is Protractor & Bubble Level PRO compatible with? Protractor & Bubble Level PRO is compatible with both iPhone and iPad devices. It is designed to leverage the capabilities of Apple's mobile platforms. ### How accurate are the angle measurements in Protractor & Bubble Level PRO? The app offers 360° angle measurement with an accuracy of 0.1°. It also includes features like audio signals for target angles or leveling to assist in precise adjustments. ### Can Protractor & Bubble Level PRO be used in low-light conditions? Yes, Protractor & Bubble Level PRO includes a built-in flashlight feature. This allows users to perform measurements accurately even in dimly lit environments. ### How often is Protractor & Bubble Level PRO updated? The latest version of Protractor & Bubble Level PRO is 3.12, last updated on November 18, 2025. This indicates a commitment to ongoing development and improvements. ### What is the age rating for Protractor & Bubble Level PRO? Protractor & Bubble Level PRO has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals with adult supervision. ### Can I export my measurement data from Protractor & Bubble Level PRO? Yes, Protractor & Bubble Level PRO supports AirPrint and email functions for lists of saved angles. This allows for easy sharing and documentation of your measurements. ## Version history (last 5 releases) ### 3.12 — 2025-11-18 The app has been completely rebuilt with many new features. Please check it out now. ### 3.08 — 2025-02-10 The app has been completely rebuilt with many new features. Please check it out now. ### 3.02 — 2023-09-09 The app has been completely rebuilt with many new features. Please check it out now. ### 3.0 — 2023-09-04 The app has been completely rebuilt with many new features. Please check it out now. ### 2.10 — 2022-09-14 New menu design New features in ruler and surface level tool ## Apps similar to Protractor & Bubble Level PRO | App | Rating | Price | Category | | --- | --- | --- | --- | | [Measure Angles & Bubble Level](https://appshunter.io/ios/app/measure-angles-and-bubble-level/id1484113520) | 4.6 (45) | Free | Productivity | | [Measuring Tape, Photo Ruler](https://appshunter.io/ios/app/measuring-tape-photo-ruler/id1020133524) | 4.2 (2,566) | Free | Productivity | | [AR Ruler: Digital Tape Measure](https://appshunter.io/ios/app/ar-ruler-digital-tape-measure/id1326773975) | 4.7 (943) | Free | Productivity | ## More apps by Jens Rieckhof - [Bubble Shooter Fun - Match 3](https://appshunter.io/ios/app/bubble-shooter-fun-match-3/id413895698) - [Measure Angles & Bubble Level](https://appshunter.io/ios/app/measure-angles-and-bubble-level/id1484113520) - [Уровень + Угломер](https://appshunter.io/ios/app/plus/id1547834136) - [Bubble Level: AR, Angle Finder](https://appshunter.io/ios/app/bubble-level-ar-angle-finder/id1594066382) - [Rechner Besoldung Bund](https://appshunter.io/ios/app/rechner-besoldung-bund/id1602080342) All apps by Jens Rieckhof: https://appshunter.io/developer/354266124 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*