FieldApp is an application for recording observations during field trials for plant cultivar development or evaluation. Using FieldApp you can record observations in entry order, or jump to a specific entry. Workbooks are created using the Crop Informatics Workbench (http://www.cropinformatics.com/software/workbench) and then exported to FieldApp as an attachment via email. Simply send the field app file by email (with the .fieldapp extension) generated using the Crop Informatics Workbench and then open it by clicking on the attachment in the mail program on your iPhone. An example workbook can be created by clicking on plus icon next to 'New Workbook' while in 'edit' mode. Workbooks completed using FieldApp can be send via email and then opened in the Crop Informatics Workbench. When the location service is enabled FieldApp will record the location each observation is taken, which allows for quality checks to ensure observations where taken close to the plot observed. The location data can be viewed in the Crop Informatics Workbench. In 'Edit' mode the fields to be recorded can be added, removed or re-ordered, this does not effect the existing data, but only its visibility. Also in edit move, clicking on the top bar on the 'observations' view will allow the id of the entry to be changed.