If you're out in the field, with Tend you can still log in and manage expenses.
To do so login to the Tend app, and tap the three lines at the top-left of the screen and select Expenses.
You'll see a list of the various expenses broken out by date. The category is listed on top with the sub-category (usually a crop or amendment) beneath it.
You can tap on each expense to view more information or edit it. Please note: all of the fields are editable, to do so simply tap on the line you wish to edit.
To add an expense on mobile, tap the green plus sign in the bottom-right of the screen.