I can't even sign-in – Pocket Expense 6 Review

Quite disappointed with this app right now. I like the features. I accidentally deleted the app and now that I am trying to sign-in my e-mail it was telling me that username cannot be found and when I tried to sign-up again. It wouldn't even let me. Now this app is useless! I need to delete it forever unless they fix this issue!
Review by Love Mother Earth on Pocket Expense 6.