Comparison

Ruler∘ vs Bird Identifier

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

Head to head
About

Ruler∘

This app uses augmented reality to measure distances, lengths, heights, and angles with your device's camera. It offers various modes for accurate measurements on different surfaces and for small objects. Users can save their measurements directly to their camera roll.

Highlights
  • Augmented reality measurements
  • Measure distance, length, height, area, angles
  • Point and shoot measurement
  • Air Mode for linear measurement
  • Surface Locked for planes
  • Save measures to Camera Roll
Features
Read full description

Measure height, length, square, angle and more with your iPhone camera! Download now! Ruler AR uses Apple ARKit and augmented reality technology to bring you the full experience of a real tape measure right out of the box. Get the right measurement everytime by choosing the right tool for the job. • Point and shoot Aim the camera toward an object to measure • Air Mode Move phone from A to B like a tape measure • Surface Locked Restrict to surfaces like a floor or wall Features: - Light and easy to design - Measure distance, length, height, area, angles and more - Use plane detection or feature point focus - Measure in inches, meters, and centimeters - Sliders to measure small objects accurately - Save measures to Camera Roll SUBSCRIPTION PRICING AND TERMS Subscription Options: Premium Membership Monthly offers a $1.99/monthly, $0.99/weekly subscription for premium functionally and removing ads. * The price is for US customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. * Free trial automatically converts to a paid subscription unless canceled at least 24-hours before the end of the trial period. * Your subscription will automatically renew at the end of each term and your credit card will be charged through your iTunes account at confirmation of purchase. * Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. * You can turn off auto-renew at any time from your iTunes account settings but refunds will not be provided for any unused portion of the term. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. Privacy Policy - https://sites.google.com/view/rulerar/privacy-policy Terms of Use - https://sites.google.com/view/rulerar/terms-of-use

About

Bird Identifier

Instantly identify birds using photos or sound with advanced AI. Explore a comprehensive encyclopedia, access bird watching guides, and build your personal collection of identified species. Perfect for nature lovers and curious minds.

Highlights
  • AI-powered photo identification
  • Bird call and sound recognition
  • Extensive bird encyclopedia
  • Bird watching guides and tips
  • Personal bird collection
  • Fun avian stories
Features
Read full description

BirdScope offers incredibly quick identification assistance, catering to bird watchers at all experience levels and outdoor enthusiasts alike. Using advanced AI image recognition and audio analysis technologies, it can identify over 10,000 bird species—by simply snapping a photo of a bird or recording its sounds. IDENTIFY BIRDS IN A SNAP •••Bird Photo Identification​••• BirdScope is one of the best Bird identifiers out there. Whenever you see a bird, just take a photo. It could be a little sparrow in your backyard or a big eagle in the park. The app uses smart technology to look at the bird’s shape, colors, and feathers. In no time, you’ll know what kind of bird it is—just like Merlin bird identifier does! BirdScope’s bird photo identification feature also gives you details about where the bird lives, what it eats, and more.​ •••Bird Call & Sounds ID​••• Have you ever heard a strange chirp or tweet and wondered which bird made it? BirdScope’s bird call ID has got you covered. Record any Bird sounds you hear, whether it’s a loud caw or a soft whistle. The app compares the sound to thousands of others in its library. Even in a noisy place, it can quickly tell you which bird made that sound. With BirdScope’s bird sounds ID, you can identify birds by sound just as easily as by sight.​ LEARN ALL ABOUT BIRDS •••Bird Encyclopedia​••• Inside BirdScope, there’s a huge bird encyclopedia. It’s like a big book full of information about thousands of birds from all over the world. You can see beautiful pictures of each bird and read about what they look like, where they live, and how they raise their babies. Whether you’re curious about hummingbirds’ fast wings or owls’ silent flight, the bird encyclopedia has all the answers.​ •••Bird Watching Guides​••• BirdScope’s bird - watching guides are great for everyone, from new bird - watchers to pros. They tell you the best times to see different birds. For example, some birds are more active in the early morning. The guides also tell you the best places to go bird - watching near you. Plus, they give tips on how to use binoculars and cameras to get a better look at the birds.​ •••Fun Avian Stories​••• Learn interesting facts about birds with BirdScope’s avian stories. Did you know some birds can dance? Or that certain birds use tools to find food? These fun facts make bird - watching even more exciting.​ •••Build Your Collection​••• Every time you identify a new bird with BirdScope—either by taking a photo or using the bird call ID—you can add it to your own virtual bird collection. You can see how many different birds you’ve found, share your collection with other bird - lovers, and even compete with them to see who’s found the most.​ BirdScope - Bird Identifier is more than just an app. It’s a community of people who love birds. Download it now and start your bird watching adventure! Terms of Use: https://bird-app-service.bytescell.com/en/agreement.html Privacy Policy: https://bird-app-service.bytescell.com/en/privacy.html

Screenshots

Ruler∘4 screens
Bird Identifier4 screens

Verdict

The call

The clearest difference is in-app purchases: Ruler∘ at none against Bird Identifier's 4. Bird Identifier's advantage is rating (4.7 vs 4.4) and ratings volume (3K vs 44). On price, ads, monetization model 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. Bird Identifier sells 4 in-app purchases, starting at $7.99 per 7 days. Ruler∘ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Bird Identifier holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Bird Identifier has 3K ratings behind it against 44, so its average is the more settled of the two. Written reviews point the same way: 50% of Ruler∘'s written reviews are positive against 67% of Bird Identifier's.

UpkeepUpdate frequency

Ruler∘ ships an update every 2 weeks, Bird Identifier weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard6 real differences · 4 level
Ruler∘ versus Bird Identifier: the parameters behind the verdict, then further details
ParameterRuler∘Bird Identifier
PriceFreeFree
Rating4.4 (44 ratings)4.7 (3K ratings) — better
Positive reviews50.0% of reviews67.2% of reviews — better
Number of ratings443K — better
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size8 MB88 MB
Age rating4+9+
DeveloperAndrei ShpileuskiScala technology limited

Customer experience

Ruler∘

All ratings44 ratings
Positive81.8%
Neutral6.8%
Negative11.4%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bird Identifier

All ratings3,042 ratings
Positive93.2%
Neutral2.2%
Negative4.6%
Written reviews268 reviews
Positive67.2%
Neutral4.9%
Negative28.0%

Bugs and requests

Ruler∘

Not enough reviews yet to summarise bugs or requests.

Bird Identifier

Reported bugs

2 issues
  • Blank white screen on launch
  • Incorrect bird breed identification

Requested features

2 requests
  • Option to upload videos
  • Improve accuracy of bird identification

In-app purchases

None

Ruler∘

No in-app purchases

4 purchases

Bird Identifier

Subscriptions4
  • Bird identifier Pro weekly$7.997 Days
  • Bird identifier Pro yearly$39.991 Year
  • Bird identifier yearly pro7 Days trial$39.991 Year
Show 1 more
  • Bird identifier yearly pro1 Month trial$39.991 Year

Questions

Is Ruler∘ free?
Ruler∘ is free to download, with no in-app purchases.
Is Bird Identifier free?
Bird Identifier is free to download, with in-app purchases available.
Which has better reviews, Ruler∘ or Bird Identifier?
Bird Identifier is rated higher. Ruler∘ averages 4.4 out of 5 from 44 ratings, while Bird Identifier averages 4.7 from 3K ratings.
Do Ruler∘ or Bird Identifier have ads?
Neither Ruler∘ nor Bird Identifier shows ads.
Which is updated more often, Ruler∘ or Bird Identifier?
Ruler∘ ships an update every 2 weeks, and Bird Identifier weekly. Most recently, Ruler∘ was updated on November 3, 2026 and Bird Identifier on November 5, 2026.

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