Apps like BTO Ringing & NRS Info

Here are some great alternatives to BTO Ringing & NRS Info by British Trust for Ornithology :
Birds of Europe Field Guide
Birds of Europe Field Guide
★4.0
NestWatch by the Cornell Lab
NestWatch by the Cornell Lab
★3.2
Indian Birds
Indian Birds
★4.3
Picture Bird - Bird Identifier
Picture Bird - Bird Identifier
★4.6
animal ringtones: bird sounds
animal ringtones: bird sounds
★4.8
Birds Of Britain
Birds Of Britain
★4.8
OrnitO
OrnitO
★4.6
Identify Birds,Bird Identifier
Identify Birds,Bird Identifier
★3.7
BirdNET
BirdNET
★4.1
World of Wings
World of Wings
★4.9
GoBird - Guide to Nearby Birds
GoBird - Guide to Nearby Birds
★4.1
Sparrow Sounds - Sparrow Calls
Sparrow Sounds - Sparrow Calls
★4.6
Birder's Diary
Birder's Diary
★4.3
Birds Sounds Ringtones
Birds Sounds Ringtones
★3.9
Morcombe's Birds of Australia
Morcombe's Birds of Australia
★4.3
Smart Bird ID
Smart Bird ID
★4.2