Comparison

Protractor for Angle Measuring vs Annotate Audio

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

Head to head
About

Protractor for Angle Measuring

Transform your iPhone into a precision angle measuring tool. Easily measure angles in real-time using touch or camera modes, and even analyze angles in existing photos. Customize your tools for a seamless experience.

Highlights
  • Real-time angle measurement
  • Touch and camera modes
  • Measure angles in photos
  • Simultaneous unlimited angle measurement
  • Tool color customization
  • Plumb bob pendulum for tilt
Features
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Your pocket angle expert! Transform your iPhone into a precision tool for real-time angle measurement. Simply tap, snap, and assess angles effortlessly with our intuitive touch and camera modes. Measure unlimited angles simultaneously, customize tools, and enjoy the perfect blend of accuracy and simplicity. Ideal for architects or anyone seeking quick, reliable measurements. Embrace the power of Protractor for fast, on-the-go angle assessments! Key Features: • Touch Measure: Tap the screen to set angles (use the camera view). • Plumb Bob Pendulum: Perfect for determining tilt (calibrate for accuracy). • Angle Measurement in Photos and from Camera. • Simultaneous Measurement of Unlimited Angles. • Tool Color Customization for Visual Convenience. Privacy Policy: https://appliks.com/privacy-policy ​​Terms of Use: https://appliks.com/terms-of-use

About

Annotate Audio

Features
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Teach your iPhone to recognise any sound. Then let it listen for you, recording only when that sound happens. Annotate Audio learns the sounds you care about: your dog barking, a snore, a cough, a baby crying, a doorbell. Leave it listening overnight or while you're out, and come back to clips of exactly what you asked for, sorted into folders. No hours of silence to scroll through. HOW IT WORKS 1. Pick a sound. Each sound gets its own folder. Add a "Not …" folder too, so it learns the difference. 2. Record some reps. Every recording is a rep. Five reps of two sounds is enough to start. 3. Tap Train. Your model is built right on your iPhone in a few minutes. No cloud, no code. 4. Turn on auto record. It listens and saves a clip every time it hears your sound. NEVER MISS THE START Auto record keeps a short rolling buffer, so every clip begins before the sound did. Manual recordings can include the 2 seconds before you tapped record, too. A DOG THAT LEARNS WITH YOU Your pixel pup levels up as you record: Puppy, Learning, Good dog, Top dog. It earns a collar at 5 reps, a tag at 50 and a crown at 100, and tells you what it still needs before it can train. MADE FOR REAL LIFE • Barking or whining while you're away • Snoring, sleep talking and coughing at night • A baby crying in the next room • Doorbells, alarms, appliances and machines • Birds, wildlife and field recordings • Any sound you want to catch, count or collect FEATURES • Train custom sound classifiers on your iPhone • Auto record triggered by the sounds you trained • Detects several sounds at once and files each clip in its own folder • Low, mid and high confidence settings • Pre-buffer so clips start before the sound • Manual recording, open-ended or 5 seconds • Live waveform and clip playback • Move clips between folders to clean up your training data • Switch between several trained models • Keeps listening in the background, and dims the screen when the phone is face down or covered • iCloud sync of recordings and models across your devices • ZIP export of recordings, including a training layout for Create ML on Mac PRIVATE BY DESIGN Training and listening happen on your device. No account. No ads. No tracking. Your recordings stay in your own iCloud. ONE PRICE Pay once. No subscription. FOR MAKERS AND RESEARCHERS Annotate Audio is also a quick way to collect and label audio datasets in the field and train Core ML sound models without writing code: bioacoustics, machine monitoring, smart-home experiments, or checking whether a sound is recognisable before you build.

Screenshots

Protractor for Angle Measuring4 screens
Annotate Audio3 screens

Verdict

The call

The clearest difference is price: Protractor for Angle Measuring at Free against Annotate Audio's $3.99. Protractor for Angle Measuring also leads on iOS requirement (16.6 vs 18.0). Annotate Audio's advantage is in-app purchases (none vs 5) 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 for Angle Measuring is free to download; Annotate Audio costs $3.99 up front. Protractor for Angle Measuring sells 5 in-app purchases, starting at $0.99 per 7 days. Annotate Audio asks for nothing beyond the download.

UpkeepUpdate frequency

Protractor for Angle Measuring ships an update every 2 weeks, Annotate Audio weekly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
Protractor for Angle Measuring versus Annotate Audio: the parameters behind the verdict, then further details
ParameterProtractor for Angle MeasuringAnnotate Audio
PriceFree — better$3.99
Rating4.5 (1.1K ratings) — better—
Positive reviews49.4% of reviews—
Number of ratings1.1K — better—
Update frequencyEvery 2 weeksWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.6 — better18.0
Further details — not scored
Size112 MB7 MB
Age rating4+4+
DeveloperAppLiks Sp. z O.O.Marco Luthi

Bugs and requests

Protractor for Angle Measuring

Reported bugs

2 issues
  • Protractor tool is hard to use and requires multiple tries
  • Angle measurements do not match real-world angles

Requested features

3 requests
  • Add more instructions and guidance for using the protractor tool
  • Improve the zoom functionality when measuring angles in photos
  • Enhance the accuracy of angle measurements

Annotate Audio

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Protractor for Angle Measuring

Subscriptions5
  • Weekly Access$0.997 Days
  • Weekly Access with Trial3 Days trial$1.997 Days
  • Weekly Access$1.997 Days
Show 2 more
  • Yearly Access$3.991 Year
  • Yearly Access$4.991 Year
None

Annotate Audio

No in-app purchases

Questions

Is Protractor for Angle Measuring free?
Protractor for Angle Measuring is free to download, with in-app purchases available.
Is Annotate Audio free?
Annotate Audio costs $3.99, with no in-app purchases.
Do Protractor for Angle Measuring or Annotate Audio have ads?
Protractor for Angle Measuring shows ads; Annotate Audio does not.
Which is updated more often, Protractor for Angle Measuring or Annotate Audio?
Protractor for Angle Measuring ships an update every 2 weeks, and Annotate Audio weekly. Most recently, Protractor for Angle Measuring was updated on October 24, 2026 and Annotate Audio on October 9, 2026.

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