Comparison

Protractor Smart vs Transferidor BLA

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

Transferidor BLA

Features
Read full description

Measures any angle. The iPhone becomes a protractor. You rest it against a surface, a wall, a ramp, and read the large angle in BLA typography. Tap to calibrate, hold mode to freeze the reading. The free protractors on the App Store are throwaway utilities, full of ads, with garish icons. Transferidor BLA is the opposite. Editorial typography, Areia BLA background, large angle display in whole degrees, arc with fine marks every 5 degrees and long marks every 15. WHAT IT'S FOR When the problem is the tilt: the accessibility ramp at the store (code says at most 8.33%), the TV that needs to hang straight on the wall, the small solar panel that wants about 16 degrees in Goiânia, the picture frame to be cut at 45, the wobbly table leg. The protractor from your school ruler now fits in your pocket. And it shows you with calm. ARC AND POINTER Semicircle arc with fine marks every 5 degrees, long marks every 15, numbers 15, 30, 45, 60, 75 and 90 on both sides of zero at the top. Pointer animated with soft physics, no jitter on quick moves. Large angle display in whole degrees, in serif Tinta. NOTABLE ANGLES When the angle hits a value that matters to the craft (zero, one third, half, two thirds, plumb), the app highlights quietly with a Verde BLA capsule. No fanfare. Just an editorial confirmation. CALIBRATION The reading comes from the accelerometer and gyroscope of the iPhone, with magnetic correction so it doesn't drift when you rotate the device. You place the iPhone on what you consider zero (the surface that should be level, the wall that should be plumb), tap calibrate, and the app reads the tilt relative to that zero. Works the same in portrait, in landscape, in any rest. Tap recalibrate to change the reference, tap clear calibration in Settings to go back to the raw reading. HOLD MODE Tap hold to freeze the reading on the display. Useful for measuring in tight spots (under a piece of furniture, behind a TV, in an awkward angle) and reading it later. Tap release to resume. 2 THEMES Areia BLA, light background with the brand base. Tinta, dark mode for low-light environments. The theme follows the iPhone's Dark Mode. 100% OFFLINE No data collection. No network. No login. No analytics. No crash reports. One-time purchase, open, measure. Transferidor BLA is an app made in Goiânia by BLA Publicações e Conteúdo Digital, an independent editorial studio led by Ivan Grycuk.

Screenshots

Protractor Smart4 screens
Transferidor BLA4 screens

Verdict

The call

The clearest difference is in-app purchases: Transferidor BLA at none against Protractor Smart's 1. Transferidor BLA also leads on update cadence (every 2 weeks vs every 21 months). Protractor Smart's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 18.0). On price and ads 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. Transferidor BLA asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor Smart ships an update every 21 months, Transferidor BLA every 2 weeks. The most recent releases landed on November 11, 2026 and November 13, 2026 respectively.

Scorecard4 real differences · 6 level
Protractor Smart versus Transferidor BLA: the parameters behind the verdict, then further details
ParameterProtractor SmartTransferidor BLA
PriceFreeFree
Rating4.6 (248 ratings) — better—
Positive reviews43.6% of reviews—
Number of ratings248 — better—
Update frequencyEvery 21 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better18.0
Further details — not scored
Size11 MB1 MB
Age rating4+4+
DeveloperExaMobile S.A.BLA Publicações e Conteúdo Digital

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

Transferidor BLA

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Protractor Smart

One-time1
  • AdBlock - Remove ads$1.99
None

Transferidor BLA

No in-app purchases

Questions

Is Protractor Smart free?
Protractor Smart is free to download, with in-app purchases available.
Is Transferidor BLA free?
Transferidor BLA is free to download, with no in-app purchases.
Do Protractor Smart or Transferidor BLA have ads?
Neither Protractor Smart nor Transferidor BLA shows ads.
Which is updated more often, Protractor Smart or Transferidor BLA?
Protractor Smart ships an update every 21 months, and Transferidor BLA every 2 weeks. Most recently, Protractor Smart was updated on November 11, 2026 and Transferidor BLA on November 13, 2026.

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