To start a check, press on New, select Perform check, select site/section and a unit/round, then press Next. Now select the check you want to perform. In the check, you answer each question by pressing the green button if it is OK and if there is a deviation, press the yellow button. All questions must be answered before you can submit the check.
(It is up to the ones who builds the checklist if it should be possible to report deviations on a question, therefore the yellow button can be missing on certain questions.)
If you have allowed GPS-location in the app, the position will be displayed on a map where the control was performed.