Comparison

Bird Code Lookup vs Walk the Parks

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

Head to head
About

Bird Code Lookup

Features
Read full description

Bird codes, also known as banding codes or alpha codes, are four-letter and six-letter abbreviations for bird names used by birders, bird banders and ornithologists, and birdwatchers in North and Central America. For example, the four-code for Wood Duck is “WODU”. The six-letter code is “AIXSPO” which is derived from the Wood Duck’s Scientific Name of “Aix sponsa”. These Bird Codes are commonly used as short-hand to write a bird names (often incorrectly). When entering or reading field notes, Bird Codes can speed and simplify matters but can take years to learn and can be confusing. The Bird Code Lookup App converts: • Four Letter Codes into Common Bird Names • Common Bird Names into Four Letter Codes (via a quick search) • Six Letter Codes into Scientific Bird Names • Scientific Bird Names into Six Letter Codes (via a quick search) Contains the 2,431 Bird Species (including hybrids) in the 2024 AOU Supplement.

About

Walk the Parks

This app transforms your daily steps into immersive virtual hikes through scenic global parks. It visually represents your progress on real routes, complete with changing weather and day/night cycles. Earn collectible stamps for completing journeys and relive your adventures.

Highlights
  • Virtual hikes based on real steps
  • Dynamic weather and day/night cycles
  • Illustrated park journeys
  • Collectible passport stamps
  • Offline functionality
  • Customizable hiker avatar
Features
Read full description

A walking world that moves with you. Walk the Parks turns the walking you already do into living, illustrated journeys through the great parks and trails of the world. Connect Apple Health once. From then on, every real step carries your hiker along a real route: past the landmarks, through weather that changes day by day, under a sun and moon that follow your own clock, toward a mountain that grows on the horizon as you close in on it. Journeys through the parks, not miles between them. Every route is a real tour with real mileage, so a landmark arrives every few days and a finished park every couple of weeks: Acadia's island loop, the Grand Canyon's rim, Yosemite's valley and high country, Kilimanjaro camp by camp. A WORLD THAT ANSWERS YOUR STEPS • The scene is drawn live, not photographed. Ridges, forests, canyons, coasts and snowfields shift as your route climbs and descends. • Dawn, golden hour, night, rain, snow and mist, each on its own schedule. Open the app at 6 a.m. and it's first light on the trail. • Summit journeys climb for real: the ground steepens, the ridges sink below you, and you break through a sea of cloud near the top. • Your hiker, your way: hat, trekking pole, and a trail dog who trots ahead. EARN EVERY STAMP Arrive at the end of a route and your passport gets its stamp: Half Dome for Yosemite, hoodoos for Bryce, a lighthouse for Acadia. Tap any stamp to relive the journey day by day, or rewind and watch it replay. MADE FOR REAL LIFE • Journeys pace to you. Walk more, arrive sooner. • Switch parks any time; your progress waits exactly where you left it. • Landmark alerts and a streak counter keep you moving without nagging. • A Home Screen widget keeps your trail in sight. • Share Journey Cards of your milestones. • Works entirely offline. No account. No ads. Nothing tracks you. ONE PURCHASE, YOURS FOREVER Nine journeys are free to walk, on five continents. The Full Passport unlocks all 63 U.S. national parks with a single one-time purchase. Eight Expedition packs add the world's great summits and trails: Everest and Kilimanjaro, the Camino, the Appalachian and Pacific Crest Trails, Patagonia, Japan, New Zealand, the Alps and the Himalaya. No subscription, ever. YOUR DATA STAYS YOURS Walk the Parks reads only your step count and walking distance from Apple Health, keeps everything on your device, and collects nothing. There's no sign-up, no server, and no analytics company watching you walk. Lace up. The trail is waiting. Walk the Parks is an independent app. It is not affiliated with, endorsed by, or sponsored by the National Park Service, the U.S. Department of the Interior, or Eastern National's Passport To Your National Parks® program. All trademarks belong to their respective owners.

Screenshots

Bird Code Lookup4 screens
Walk the Parks4 screens

Verdict

The call

The clearest difference is in-app purchases: Bird Code Lookup at none against Walk the Parks's 9. Walk the Parks's advantage is update cadence (weekly vs every 40 months). On price, ads, device support and iOS requirement 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. Walk the Parks sells 9 one-off in-app purchases. Bird Code Lookup asks for nothing beyond the download.

UpkeepUpdate frequency

Bird Code Lookup ships an update every 40 months, Walk the Parks weekly. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
Bird Code Lookup versus Walk the Parks: the parameters behind the verdict, then further details
ParameterBird Code LookupWalk the Parks
PriceFreeFree
Rating—5.0 (7 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 40 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size212 MB2 MB
Age rating4+4+
DeveloperPVI Maine LLCsam swenson

In-app purchases

None

Bird Code Lookup

No in-app purchases

9 purchases

Walk the Parks

One-time9
  • World Summits$4.99
  • Canada$4.99
  • Patagonia$4.99
Show 6 more
  • Long Trails$4.99
  • Japan$4.99
  • New Zealand$4.99
  • Europe$4.99
  • Himalaya$4.99
  • Full Passport$14.99

Questions

Is Bird Code Lookup free?
Bird Code Lookup is free to download, with no in-app purchases.
Is Walk the Parks free?
Walk the Parks is free to download, with in-app purchases available.
Do Bird Code Lookup or Walk the Parks have ads?
Neither Bird Code Lookup nor Walk the Parks shows ads.
Which is updated more often, Bird Code Lookup or Walk the Parks?
Bird Code Lookup ships an update every 40 months, and Walk the Parks weekly. Most recently, Bird Code Lookup was updated on October 4, 2026 and Walk the Parks on October 10, 2026.

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