Comparison

Audubon Bird Guide vs Metric Conversion tool

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

Head to head
About

Audubon Bird Guide

Identify North American birds with this comprehensive field guide. Features include a bird ID tool based on observations, detailed species information with photos and audio, and a personal sightings log. Discover nearby birding locations and connect with conservation efforts.

Highlights
  • Bird identification tool
  • Detailed species profiles
  • Bird song and call audio
  • Sightings log and life list
  • Nearby birding hotspots
  • Photo sharing
Features
Read full description

The Audubon Bird Guide is a free and complete field guide to over 800 species of North American birds, right in your pocket. Built for all experience levels, it will help you identify the birds around you, keep track of the birds you’ve seen, and get outside to find new birds near you. With over 2 million downloads to date, it is one of the best and most trusted field guides for North American birds. KEY FEATURES: ALL-NEW: BIRD ID It's now easier than ever to identify a bird you just saw. Enter all you were able to observe—what color was it? How big? What did its tail look like?—and Bird ID will narrow down a list of possible matches for your location and date in real time. LEARN ABOUT THE BIRDS YOU LOVE Our field guide features over 3,000 photos, over eight hours of audio clips of songs and calls, multi-season range maps, and in-depth text by leading North American bird expert Kenn Kaufman. KEEP TRACK OF ALL THE BIRDS YOU SEE With our completely redesigned Sightings feature, you can keep a record of every bird you encounter, whether you're hiking, sitting on the porch, or simply catching a glimpse of birds out the window. We'll even keep an updated life list for you. EXPLORE THE BIRDS AROUND YOU See where the birds are with nearby birding hotspots and real-time sightings from eBird. SHARE PHOTOS Post your photos to the Photo Feed so other Audubon Bird Guide users can see your best bird shots. GET INVOLVED WITH AUDUBON Keep up with the latest news from the world of birds, science, and conservation. Find an Audubon location near you to go birding. Or see where your voice is needed and take action to protect birds and the places they need, right from your app. Have any questions or need help? Contact us at audubonconnect@audubon.org About Audubon: The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation. Audubon’s state programs, nature centers, chapters, and partners have an unparalleled wingspan that reaches millions of people each year to inform, inspire, and unite diverse communities in conservation action. Since 1905, Audubon’s vision has been a world in which people and wildlife thrive.

About

Metric Conversion tool

This app provides a comprehensive unit and currency converter with a user-friendly interface. It offers offline functionality, supports over 30,000 unit conversions, and includes more than 160 currencies with live exchange rates. Users can save favorite conversions and get precise results.

Highlights
  • Offline functionality
  • Over 30,000 unit conversions
  • 160+ currencies with live rates
  • Save favorite conversions
  • Answers in fractions
  • Up to 5 decimal places
Features
Read full description

Unit converter App from the most popular metric conversions website in the world, metric-conversions.org. Over a billion visitors have used our website, try our app and see why we're so popular! FEATURES: Easy to use clear interface Works offline All popular unit conversions (over 30,000 of them) Over 160 currencies (including Bitcoin and other cryptocurrencies) with live exchange rates Store your favorite conversions for quick access Answers in fractions where needed. Obtain conversion results with up to 5 decimal places Imperial units split into other imperial units – so you can get a weight in stones and pounds, pounds and ounces, etc. Lengths break down into feet and inches, etc. WEIGHT: Kilograms, Pounds, Stones, Ounces, Grams, Carats, Grains, Hundredweights, Micrograms.Milligrams, Ounces, Pennyweights, Tons, Troy pounds, Troy ounces TEMPERATURE: Celsius, Fahrenheit, Kelvin, Rankine, Newton, Réaumur, Rømer, Delisle. LENGTH: Miles, Yards, Feet, Inches, Kilometers, Meters, Centimeters, Chains, Decimeters, Furlongs, Leagues, Lightyears, Microinches, Microns, Millimeters, Parsecs, Nautical Leagues, Nautical Miles. AREA: Square Miles, Acres, Square Yards, Square Feet, Square Inches, Square Kilometers, Hectares, Square Meters, Square Centimeters, Square Millimeters, Square Microns, Square Microinches. VOLUME: Cups, Tablespoons, Teaspoons, Gallons, Pints, Gills, Ounces , Cubic Meters, Liters, Centiliters, Milliliters, Cubic Yards, Barrels, Quarts, Gills. SPEED: Miles per hour, Kilometers per hour, Meters per second, Knots, Mach, Light speed and more. TIME: Seconds, Minutes, Hours, Days. ANGLE: Degrees, Radians, Minutes (Angular), Seconds (Angular), Centrad, Gradians, Milliradians, Sign PRESSURE: Atmospheres, Bar, Pascals, Pound Force per Square Inch, Inches of Mercury, Inches of Water, Kilogram Force per Square Meter, Millibar, Millimeters of Mercury, Millimeters of Water, Newtons per Meter Squared, Pounds per Square Foot, Torrs CURRENCY: All state sponsored world currencies as well as major crypto-currencies. If you need anything added, email us at appcontact@metric-conversions.org and we'll do our best to put them in for you!

Screenshots

Audubon Bird Guide4 screens
Metric Conversion tool4 screens

Verdict

The call

The clearest difference is rating: Metric Conversion tool at 4.8 against Audubon Bird Guide's 4.3. Metric Conversion tool also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, review sentiment, update cadence and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Metric Conversion tool holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 4.5K and 15K respectively. Written reviews point the same way: 64% of Audubon Bird Guide's written reviews are positive against 70% of Metric Conversion tool's.

UpkeepUpdate frequency

Audubon Bird Guide ships an update every 3 weeks, Metric Conversion tool every 10 days. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
Audubon Bird Guide versus Metric Conversion tool: the parameters behind the verdict, then further details
ParameterAudubon Bird GuideMetric Conversion tool
PriceFreeFree
Rating4.3 (4.5K ratings)4.8 (15K ratings) — better
Positive reviews64.3% of reviews70.2% of reviews — better
Number of ratings4.5K15K — better
Update frequencyEvery 3 weeksEvery 10 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.615.1 — better
Further details — not scored
Size358 MB22 MB
Age rating4+4+
DeveloperNational Audubon SocietyWight Hat

Customer experience

Audubon Bird Guide

All ratings4,519 ratings
Positive82.3%
Neutral4.1%
Negative13.6%
Written reviews238 reviews
Positive64.3%
Neutral6.3%
Negative29.4%

Metric Conversion tool

All ratings14,634 ratings
Positive96.5%
Neutral2.1%
Negative1.4%
Written reviews198 reviews
Positive70.2%
Neutral5.1%
Negative24.7%

User reviews

Audubon Bird Guide

From 4.5K App Store ratings

What we love

  • 🚀 Great app
  • 👍 Easy to use
  • 🔍 Helpful for identifying birds
  • 🎶 Useful bird calls and sounds
  • 📍 Provides location-based bird sightings

Room to improve

  • 🐛 Buggy and crashes
  • 🔄 Confusing interface changes
  • 🔒 Requires account creation
  • 📍 Limited location-based features
  • 🗺️ Outdated or incomplete range maps

Metric Conversion tool

From 15K App Store ratings

What we love

  • 💡 Useful conversion tool
  • 👍 Easy to use and navigate
  • 🚀 Quick and efficient
  • 👍 Comprehensive coverage of conversions

Room to improve

  • 🔊 Intrusive and loud ads
  • 🔒 Questionable privacy practices
  • 🐛 Inaccurate conversions
  • 👎 Disruptive to workflow

Bugs and requests

Audubon Bird Guide

Reported bugs

5 issues
  • Crashes when opening settings
  • Incorrect sighting location recording
  • Unreliable login and account features
  • Compatibility issues with newer devices
  • Syncing and data loss problems

Requested features

7 requests
  • Add photo ID and sound ID features
  • Improve location-based bird sightings
  • Expand coverage to more regions/countries
  • Allow offline access to field guide
  • Provide more detailed bird information
Show 2 more
  • Improve sorting and filtering options
  • Sync sightings with other platforms

Metric Conversion tool

Reported bugs

2 issues
  • Temperature conversion displaying incorrect values
  • Ads triggering false memory full warnings

Requested features

3 requests
  • Paid version to remove ads
  • Option to display results in preferred format
  • Speed conversion (mph, km/h, etc.)

In-app purchases

None

Audubon Bird Guide

No in-app purchases

None

Metric Conversion tool

No in-app purchases

Questions

Is Audubon Bird Guide free?
Audubon Bird Guide is free to download, with no in-app purchases.
Is Metric Conversion tool free?
Metric Conversion tool is free to download, with no in-app purchases.
Which has better reviews, Audubon Bird Guide or Metric Conversion tool?
Metric Conversion tool is rated higher. Audubon Bird Guide averages 4.3 out of 5 from 4.5K ratings, while Metric Conversion tool averages 4.8 from 15K ratings.
Do Audubon Bird Guide or Metric Conversion tool have ads?
Audubon Bird Guide shows ads; Metric Conversion tool does not.
Which is updated more often, Audubon Bird Guide or Metric Conversion tool?
Audubon Bird Guide ships an update every 3 weeks, and Metric Conversion tool every 10 days. Most recently, Audubon Bird Guide was updated on September 23, 2026 and Metric Conversion tool on September 25, 2026.

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