When we move money from one account to another we are not generating incomes or expenses, but simply doing a transfer. And there's a specific functionality for this kind of transfer.
On Mobills main screen, tap "Accounts Balance". On the Accounts screen, tap the "arrows" icon at the upper right corner:
Or tap the "+" button on the Main Screen, then tap "Transfer". Just like the images below:
After that, add all the required information and save it by tapping the "✓" icon:
Done! You've made a transfer between accounts!
Any questions or difficulties? Please, submit a request.