Most of the best birding apps are free and run by non-profits, so we have no affiliate relationship with them. We link straight to the official pages.
At a glance
| App | Cost | Best for | Key features |
|---|---|---|---|
| Merlin Bird ID | Free | Identifying a bird right now (sound, photo, or questions) | Offline Sound ID and Photo ID; step-by-step ID; life list; eBird-powered local lists |
| eBird | Free | Logging checklists, finding hotspots, rare-bird alerts | Offline checklist entry; alerts; targets; the data behind most other apps |
| Audubon Bird Guide | Free | A free North American field guide in your pocket | 800+ species; 3,000+ photos; 8+ hours of audio; range maps; sightings list |
| iNaturalist | Free; nonprofit-run | Birds plus plants, insects and everything else | Community-verified IDs; observations feed real research |
| BirdNET | Free | Sound ID with confidence scores; research-minded users | 11,000+ species globally; BirdNET Live works offline |
| Birda | Free, with optional paid Birda+ | Social birding: challenges, badges, community | Photo AI ID; logging; imports from eBird, BirdTrack, BirdLasser and iNaturalist |
| Sibley Birds v2 | Paid, one-time ($19.99 on Sibley Guides) | The most detailed field-guide ID for North America | 930+ species; 2,700+ calls and songs; works fully offline |
Merlin Bird ID (Cornell Lab of Ornithology)
Merlin is the best first app for most people. It offers four ways to identify a bird: Sound ID listens and suggests who is singing in real time, Photo ID suggests likely species from a picture, Step-by-step ID asks three questions, and you can browse lists of birds near you. Cornell says Sound ID and Photo ID work completely offline once you have downloaded the bird packs you need, and that Merlin is powered by eBird data for local lists.
Watch out for: it suggests, you decide. Treat Sound ID results as leads to confirm by sight, especially for look-alike songs.
eBird (Cornell Lab of Ornithology)
eBird is where you keep your records. You submit checklists of everything you saw and heard, and eBird builds your life, year and county lists, shows hotspots, and powers rare-bird alerts. Its free mobile app lets you collect data offline anywhere. It is the data source behind many of the other apps here.
Watch out for: it is a logging tool, not an identification tool. Pair it with Merlin.
Audubon Bird Guide
The Audubon Bird Guide is a free field guide to 800+ North American species with 3,000+ photos, 8+ hours of songs and calls, multi-season range maps, and text by Kenn Kaufman. Its Bird ID tool narrows species by color, size and shape for your location and date, and it shows nearby hotspots and real-time sightings from eBird. It also keeps a sightings list.
Watch out for: North America only.
iNaturalist
iNaturalist is a 501(c)(3) nonprofit where every observation you share becomes data for scientists. It is not birding-specific, which is its strength if you also care about plants, insects and reptiles, and its weakness if you want bird-focused tools like checklists and alerts.
BirdNET
The BirdNET app records a few seconds of sound and returns ranked species suggestions with confidence scores, covering 11,000+ species worldwide. The project also offers BirdNET Live, which runs on-device and works offline, aimed at field researchers and naturalists. Recordings you choose to share are used for non-commercial research under a CC BY-SA 4.0 license, per the project site.
Watch out for: it is research-flavored. Merlin is the friendlier everyday sound ID for most people.
Birda
Birda is the social, game-like option: challenges, badges, a community feed, photo-based AI identification, and imports from eBird, BirdTrack, BirdLasser and iNaturalist. The base app is free; Birda+ is an optional paid subscription (check the store listing for what it includes and current pricing).
Watch out for: it overlaps with Merlin plus eBird. Choose it if the community and challenges are what keep you going out.
Sibley Birds v2
The Sibley Birds app brings the content of David Sibley's printed guide to your phone: 930+ North American species, detailed artwork, 2,700+ calls and songs, side-by-side comparison of similar species, and state or province status by month. It works entirely offline. It is a paid, one-time purchase (listed at $19.99 on Sibley's site); the purchase carries across devices on the same platform.
Sibley also writes thoughtfully about playback: playing recorded calls can disturb birds and other birders, is illegal in many parks and refuges, and should be used sparingly if at all. That applies to every app with audio.
Which apps should you install?
- Brand new to birding: Merlin. Add eBird once you want to keep lists.
- Want a serious field guide and do not mind paying: Sibley, or the free Audubon guide.
- Like competing and community: Birda on top of Merlin and eBird.
- Interested in all wildlife: iNaturalist.
- Chasing rarities: eBird alerts. Read our alerts guide.
Do not forget a printed guide
Phones die and signals fail. A printed guide never needs charging and is faster to flip than most people expect. Two well-known options:
- The Sibley Guide to Birds (second edition), the book behind the app above.
- National Geographic Field Guide to the Birds of the United States and Canada (8th edition, by Ted Floyd, published September 2025).
Looking for optics to go with your apps? See our binocular picks and spotting-scope guide. Want to compare printed guides? See field guides by region. Birding from the backyard? Start with our feeder guide.