Comparison

Protractor Smart vs Convertly

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

Head to head
About

Protractor Smart

This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.

Highlights
  • Camera-based angle measurement
  • Touch measure mode
  • Plumb bob measure for slopes
  • Polygon measurement (premium)
  • Screenshot functionality
Features
Read full description

Protractor - smart instrument to measure angles. Turn on the camera mode and measure the angle of buildings, mountains, or any other object around you. This app includes two free measuring modes: - Touch measure - touch the screen to set the angle (use camera view!). - Plumb bob measure - pendulum - use to determine the slope (remember to calibrate the plumb). In each mode, you can switch to camera view and take measurements of all objects around you. Additional Premium mode: Polygon measurement lets you draw any shape on your screen to check all its angles. Turn on the camera to see the real object through your phone and copy its shape. You can also pick a photo from your gallery or take a new picture to draw a shape on the image. In Premium mode, you can change colors, add helper lines, and switch between different angle units. All modes allows you to make a screenshot of anything on the screen. Enjoy !!!

About

Convertly

Features
Read full description

Convertly brings everyday calculations, scientific functions, date-grouped calculation history, and unit conversions together in one app. Use the Calculator, Convert, Scenarios, and Library tabs to switch tools, including travel, real estate, cooking, and fitness conversions. Convert temperature, distance, clothing and shoe sizes, pyeong, square meters, square feet, acres, cups, milliliters, tablespoons, teaspoons, ounces, grams, pounds, kilograms, miles, kilometers, and pace values. The app keeps volatile exchange rates manual, so you stay in control of the reference value you want to use.

Screenshots

Protractor Smart4 screens
Convertly4 screens

Verdict

The call

The clearest difference is in-app purchases: Convertly at none against Protractor Smart's 1. Convertly also leads on update cadence (every 2 weeks vs every 21 months). Protractor Smart's advantage is ads (none vs shown) and iOS requirement (14.0 vs 17.0). On price and 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

Both are free to download. Protractor Smart sells 1 one-off in-app purchase. Convertly asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor Smart ships an update every 21 months, Convertly every 2 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Protractor Smart versus Convertly: the parameters behind the verdict, then further details
ParameterProtractor SmartConvertly
PriceFreeFree
Rating4.6 (247 ratings) — better—
Positive reviews43.6% of reviews—
Number of ratings247 — better—
Update frequencyEvery 21 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better17.0
Further details — not scored
Size11 MB6 MB
Age rating4+4+
DeveloperExaMobile S.A.Zrindy LLC

Bugs and requests

Protractor Smart

Reported bugs

8 issues
  • App loads indefinitely
  • App does not launch after iOS updates
  • Stuck on loading screen
  • Photo upload not possible in premium version
  • Upside-down protractor on iOS
Show 3 more
  • Phone locks during use
  • Camera mode is terrible and inaccurate
  • Poor calibration

Requested features

6 requests
  • Improve camera function (light, zoom)
  • Add automatic hold function
  • Increase digital readout size
  • Add more skins/cosmetics
  • Option to remove ads
Show 1 more
  • Fix upside-down protractor on iOS

Convertly

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Protractor Smart

One-time1
  • AdBlock - Remove ads$1.99
None

Convertly

No in-app purchases

Questions

Is Protractor Smart free?
Protractor Smart is free to download, with in-app purchases available.
Is Convertly free?
Convertly is free to download, with no in-app purchases.
Do Protractor Smart or Convertly have ads?
Convertly shows ads; Protractor Smart does not.
Which is updated more often, Protractor Smart or Convertly?
Protractor Smart ships an update every 21 months, and Convertly every 2 weeks. Most recently, Protractor Smart was updated on November 2, 2026 and Convertly on October 31, 2026.

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