Comparison

Protractor Smart vs SeaWarden

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

SeaWarden

Features
Read full description

Intuitive and easy to use, the SeaWarden app gives you the power to monitor, track and control you boat from any location in the world. Your boat is a valuable asset that may spend long periods of time unattended and potentially vulnerable. SeaWarden offers you peace of mind – something that’s worth investing in. SeaWarden’s boat monitoring system gives you the power to know that you boat is safe, secure and ready to use when you are. SeaWarden’s systems are ideal for boaters who leave their vessels unattended and want the peace of mind provided by receiving real time updates from it. The SeaWarden App will Monitor battery’s, bilge pump’s, high water, Shore Power, Smoke sensors, Hatch Sensors, Motion sensor, and custom outputs. Track boat motion and provide alerts if the boat should move away from your geofence zone. Track your journey on our unique maps Control onboard devices such as lights or any other system you would like to activate remotely

Screenshots

Protractor Smart4 screens
SeaWarden4 screens

Verdict

The call

The clearest difference is in-app purchases: SeaWarden at none against Protractor Smart's 1. SeaWarden also leads on update cadence (every 4 months vs every 21 months) and iOS requirement (12.0 vs 14.0). On price, ads 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. SeaWarden asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor Smart ships an update every 21 months, SeaWarden every 4 months. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Protractor Smart versus SeaWarden: the parameters behind the verdict, then further details
ParameterProtractor SmartSeaWarden
PriceFreeFree
Rating4.6 (242 ratings) — better—
Positive reviews40.4% of reviews—
Number of ratings242 — better—
Update frequencyEvery 21 monthsEvery 4 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size11 MB47 MB
Age rating4+4+
DeveloperExaMobile S.A.Intelligent Devices Apps Limited

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

SeaWarden

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Protractor Smart

One-time1
  • AdBlock - Remove ads$1.99
None

SeaWarden

No in-app purchases

Questions

Is Protractor Smart free?
Protractor Smart is free to download, with in-app purchases available.
Is SeaWarden free?
SeaWarden is free to download, with no in-app purchases.
Do Protractor Smart or SeaWarden have ads?
Neither Protractor Smart nor SeaWarden shows ads.
Which is updated more often, Protractor Smart or SeaWarden?
Protractor Smart ships an update every 21 months, and SeaWarden every 4 months. Most recently, Protractor Smart was updated on September 26, 2026 and SeaWarden on September 18, 2026.

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