Field Book is a simple app for collecting phenotypic notes. Data capture in the field has traditionally been a laborious process requiring writing notes by hand followed by transcription. Field Book was created to replace paper field books and to enable increased collection speed with greater data integrity. Field Book uses custom layouts for different types of data to facilitate rapid data collection. Traits being collected are defined by the user and can be exported and transferred between devices. Sample files are provided in the app. Field Book is compatible with BrAPI which can be used to transfer data to compatible databases.

Check the user manual and the wiki for usage instructions. If you run into a problem while using Field Book, search existing issues and discussions to see if it is currently being addressed. If you have a new feature idea or want to report a new bug, create a new issue.

Visit our translation page to help translate Field Book to your language. To submit code or new features, please review our contribution guidelines before opening a pull request.

Field Book regularly receives new updates to improve performance or add new features. To ensure these changes don't interfere with most field seasons, we do not update the Google Play version of the app between April 15 and September 15. An up-to-date version can be downloaded from the About section within the app or through our GitHub releases.

Development of Field Book is possible because of the support received from the following organizations:

• McKnight Foundation Collaborative Crop Research Program
• National Science Foundation No. 1543958
• USDA NIFA FACT No. 2019-67021-29931
• USAID No. 7200AA‐19LE‐00005
• USDA NIFA SCRI No. 2022-51181-38449
• USDA NIFA AG2PI No. 2022-70412-38454

This project follows the all-contributors specification. Contributions of any kind are welcome!

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