# BTO Ringing & NRS Info > UK bird ringing and nest recording information app. (iPhone/iPad app by BTO.) - Source: https://appshunter.io/ios/app/bto-ringing-and-nrs-info/id466711615 (this page in markdown: same URL + `.md`) - Developer: [BTO](https://appshunter.io/developer/447347144) - Category: Reference, Education - Price: Free - Age rating: 4+ - Requires: iOS 13.4 · 21 MB - Languages: American English - Released: 2011-09-30 - Data updated: 2026-08-20 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/bto-ringing-and-nrs-info/id466711615/reviews.md ## What is BTO Ringing & NRS Info? An app to help bird ringers, nest recorders and scientists check the correct ring sizes/codes to use for each bird species ringed in the UK (for both full-grown birds and pulli) and the codes needed to record nests and their contents. The app also includes the codes needed to record biometrics, condition and status information for each bird as well as the standard habitat codes. ## Key features - UK bird ring size and code lookup - Nest recording code information - Biometric and condition recording codes - Standard habitat codes - Information for full-grown birds and pulli ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/bto-ringing-and-nrs-info/id466711615/reviews.md ### 4/5 — Brilliant but could do with a little more *2023-03-23* Can’t live without this app as a field ecologist it’s very handy to have reminders of species codes. There are a few species missing from the app so that could do with a review, but as of lately, the links to the BTO website are now broken, since the BTO have updated their website. I hope these links will be fixed / re-linked, as it was also handy to be able to click ‘browse link to BTO Bird Facts’ to find out more on the species RE more detail about their protection status. Unless of course this info can be integrated into the app, which would be even better as you are then not reliant on mobile signal to get quick information. Hope BTO support this app more, it’s an invaluable tool for field ecologists / surveyors, not just bird ringers. ### 5/5 — Very handy backup reference *2012-05-20* If you should catch an unexpected species and don't carry Ringers Manual, or have that handy index sheet in the back of Svensson or Baker... It's all here, plus a bit. I like the link to BirdFacts. Are we heading towards Svensson Online?? A word of caution to trainees - this is a handy backup reference, NOT a substitute for time spent with your trainer, or reading (and absorbing) Ringers Manual. ## Frequently asked questions about BTO Ringing & NRS Info ### What is BTO Ringing & NRS Info used for? BTO Ringing & NRS Info is a reference tool for UK bird ringers and scientists. It helps users find correct ring sizes and codes for different bird species, as well as codes for recording nests, biometrics, and habitat information. ### Is BTO Ringing & NRS Info free to use? Yes, BTO Ringing & NRS Info is completely free to download and use. There are no in-app purchases or subscription fees associated with this application. ### What devices support BTO Ringing & NRS Info? BTO Ringing & NRS Info is available for iPhone and iPad devices. It is designed to run on iOS operating systems. ### How often is BTO Ringing & NRS Info updated? The app was last updated on September 23, 2024, with version 2.0.3. This indicates that the developer actively maintains and updates the application. ### What age rating does BTO Ringing & NRS Info have? BTO Ringing & NRS Info has an age rating of 4+. This means it is suitable for users of all ages, including children. ### Does BTO Ringing & NRS Info have ads? No, BTO Ringing & NRS Info does not contain advertisements. Users can access all its features without encountering any ads. ### Can BTO Ringing & NRS Info be used for birds outside the UK? The primary focus of BTO Ringing & NRS Info is on bird species ringed in the UK. While some general principles might apply, it is specifically tailored for UK ornithological data. ### What kind of information can be recorded using BTO Ringing & NRS Info? Users can record information such as correct ring sizes and codes for birds, nest details and contents, biometrics, condition, status, and standard habitat codes. ## Version history (last 5 releases) ### 2.0.3 — 2024-09-23 Minor bug fixes and improvements. ### 2.0.2 — 2024-07-15 Minor bug fixes and improvements. ### 2.0.1 — 2023-08-07 The app has been updated with an improved look and feel, and now contains the latest species data and additional resources for both ringers and nest recorders. When launching for the first time, you will need an internet connection. Once the required data has been downloaded, the app will continue to work fully offline. ### 1.13 — 2016-10-20 This app has been updated by Apple to display the Apple Watch app icon. Update to specify the species that are now illegal to ring in Scotland. ### 1.12 — 2016-01-06 Fixed incorrect ring size for Pallas' Grasshopper Warbler. ## Apps similar to BTO Ringing & NRS Info | App | Rating | Price | Category | | --- | --- | --- | --- | | [Where to Watch Birds Scotland](https://appshunter.io/ios/app/where-to-watch-birds-scotland/id1456351759) | 5.0 (2) | Free | Reference | | [e-Surveyor](https://appshunter.io/ios/app/e-surveyor/id1539907283) | — | Free | Reference | | [FIT Count](https://appshunter.io/ios/app/fit-count/id1540771889) | 5.0 (1) | Free | Reference | | [BWP](https://appshunter.io/ios/app/bwp/id1451326170) | 5.0 (2) | $35.99 | Reference | | [Dragonflies & Damselflies](https://appshunter.io/ios/app/dragonflies-and-damselflies/id436991286) | — | $11.99 | Reference | | [Collins British Bird Guide](https://appshunter.io/ios/app/collins-british-bird-guide/id1176939355) | 4.0 (1) | $7.99 | Reference | ## More apps by BTO - [BirdTrack](https://appshunter.io/ios/app/birdtrack/id596839218) - [Birds in Greenspaces](https://appshunter.io/ios/app/birds-in-greenspaces/id6754637798) All apps by BTO: https://appshunter.io/developer/447347144 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*