How to edit Excel spreadsheets from Jottacloud
Open Jottacloud on your iPhone or iPad and go to Files
Click the options menu on the right side of the spreadsheet you want to edit, and select "Open in..."
(You can also open the options menu by clicking and holding on a spreadsheet)
Once you have finished editing, click the menu in the top right corner
(You can ignore this step If you have turned on "AutoSave" since all changes are saved automatically)
Your changes to the spreadsheet have now been saved and uploaded to Jottacloud.