Comparison

Bubble level and Clinometer vs Protractor Edge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Bubble level and Clinometer

This app provides precise slope and angle measurements using your device's sensors. It offers multiple units, adjustable lock sensitivity, and a peer mode for measuring angles between two devices. Customize the display with different color schemes and prevent sleep mode with adjustable auto-lock.

Highlights
  • Multiple unit modes (degrees, percentage, rise/run)
  • Adjustable dial rotation
  • Motion-sensitive lock feature
  • Volume button lock
  • Peer mode for two-device measurements
  • Fullscreen mode
  • Customizable color schemes
Features
Read full description

In this the limited but therefore free version of Clinometer. It as all features but can not be calibrated. This professional tool called Clinometer is the most precise (all you can get with some calculations) slope measurement tool for the iPhone, iPod Touch and iPad. It can be used for simple applications like aligning a frame as well as for more sophisticated fields of applications where an arbitrary slope needs to be measured exactly. Read the reviews (and write your own) for all the applications you find! Thank for all your positive feedback! Please use our support link if you have questions and suggestions, we don't read the iTunes reviews every day. With this tool, the slope can be measured by all edges of the device in every direction. When the device is put flat on the table a bubble view will fade in. The current features include: ◆ Five different unit modes: The device can display the slope in degrees (rounded or in tenth of degrees), percentage, rise over run (common for roof slope measurement in :12) and 1V:H (common in engineering) ◆ Dial Rotation: You can smoothly rotate the background dial and thus define which side of the device represents 0° and 90° degrees. ◆ Motion-sensitive Lock feature: Besides the common instant simple tap hold mechanism you can activate the motion-sensitive lock. If activated the device waits for the final lock until you hold your device steady enough for at least 2 seconds. You can set the lock sensitivity between 0.1° and 1.0° degrees. ◆ Volume Button Lock: Use volume buttons to trigger the lock. ◆ Peer Mode: Use two devices to measure angles: One as a display, the other as the measurement device that can be attached to the hardware you want to align. ◆ Fullscreen Mode: The full screen mode can be toggled by tapping the center of the screen and by the upper and lower arrows in the center. This prevents you from erroneous inputs while measuring. ◆ Different color schemes: Press the S/C Button to instantly switch the color. The color can be selected differently for the bubble and the clinometer mode. The predefined color sets include day and night color schemes (Black on White, White on Black and Red). ◆ Adjustable Auto-Lock: You can prevent the device from turning into the sleep mode. Only the full version has a two way calibration feature! Please support us and buy the full version if you can. According to wikipedia: An inclinometer or clinometer is an instrument for measuring angles of slope (or tilt), elevation or inclination of an object with respect to gravity. It is also known as a tilt meter, tilt indicator, slope alert, slope gauge, gradient meter, gradiometer, level gauge, level meter, declinometer, and pitch & roll indicator. For recreational use only. After the calibration it CAN (!) be very accurate especially for the main axis after calibration. The measurement is performed as well as possible (we try our best) by using the three inbuilt accelerometers. THANK YOU FOR YOUR SUPPORT! We will improve the application long-term. This was the first application of this kind shortly after the opening of the App Store. Since then it is continuously updated and enriched with new features. ► Check out all our products (free and paid) on www.plaincode.com

About

Protractor Edge

Measure angles directly on your device without taking photos or placing the angle on screen. This app offers a unique and efficient way to determine degrees, saving you time with its handy assistant functionality.

Highlights
  • Direct angle measurement on device
  • Intuitive line dragging interface
  • Measures angles in photos (Premium)
  • Measures from camera view (Premium)
  • Ad-free experience (Premium)
Features
Read full description

A simple protractor. Just put your device on the angle you want to measure. Then drag the two lines to align the both sides of the angle. The degrees will be there. It is different from other protractor apps. This is a new way to measure angles. It requires neither taking photo nor putting the angle above the screen. Now start using this handy assistant to measure angles which will save you a lot of time. ------------------------------------- PREMIUM ACCESS SUBSCRIPTION - Measure the world from camera - Measure angles in photos - No Ads - The subscription is $0.99 yearly with trial - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable - Terms of use: https://service.notationpad.com/terms_service.html

Screenshots

Bubble level and Clinometer4 screens
Protractor Edge2 screens

Verdict

The call

The clearest difference is price: Protractor Edge at Free against Bubble level and Clinometer's $0.99. Protractor Edge also leads on rating (4.5 vs 4.1) and ratings volume (55 vs 9). Bubble level and Clinometer's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support 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

CostPrice · In-app purchases · Ads · Monetization

Protractor Edge is free to download; Bubble level and Clinometer costs $0.99 up front. Protractor Edge sells 2 in-app purchases, starting at $1.99 per year. Bubble level and Clinometer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Protractor Edge holds the better App Store score, 4.5 against 4.1. That said, the two scores are not equally well evidenced: Protractor Edge has 55 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 94% of Bubble level and Clinometer's written reviews are positive against 70% of Protractor Edge's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Bubble level and Clinometer ships an update every 7 months, Protractor Edge every 43 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

Scorecard9 real differences · 1 level
Bubble level and Clinometer versus Protractor Edge: the parameters behind the verdict, then further details
ParameterBubble level and ClinometerProtractor Edge
Price$0.99Free — better
Rating4.1 (9 ratings)4.5 (55 ratings) — better
Positive reviews94.3% of reviews — better69.6% of reviews
Number of ratings955 — better
Update frequencyEvery 7 months — betterEvery 43 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.09.0 — better
Further details — not scored
Size13 MB21 MB
Age rating4+4+
DeveloperPeter Breitling嵩 张

Customer experience

Bubble level and Clinometer

All ratings9 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews175 reviews
Positive94.3%
Neutral0.6%
Negative5.1%

Protractor Edge

All ratings55 ratings
Positive85.5%
Neutral5.5%
Negative9.1%
Written reviews46 reviews
Positive69.6%
Neutral8.7%
Negative21.7%

In-app purchases

None

Bubble level and Clinometer

No in-app purchases

2 purchases

Protractor Edge

Subscriptions1
  • Premium Access7 Days trial$1.991 Year
One-time1
  • Remove Ads$0.99

Questions

Is Bubble level and Clinometer free?
Bubble level and Clinometer costs $0.99, with no in-app purchases.
Is Protractor Edge free?
Protractor Edge is free to download, with in-app purchases available.
Which has better reviews, Bubble level and Clinometer or Protractor Edge?
Protractor Edge is rated higher. Bubble level and Clinometer averages 4.1 out of 5 from 9 ratings, while Protractor Edge averages 4.5 from 55 ratings.
Do Bubble level and Clinometer or Protractor Edge have ads?
Protractor Edge shows ads; Bubble level and Clinometer does not.
Which is updated more often, Bubble level and Clinometer or Protractor Edge?
Bubble level and Clinometer ships an update every 7 months, and Protractor Edge every 43 months. Most recently, Bubble level and Clinometer was updated on October 13, 2026 and Protractor Edge on October 11, 2026.

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