DO NOT upgrade in the app – Pocket Expense 6 Review

I like the free version very much and decided to purchase the PRO version without ads. I decided to purchase in-app since I'm afraid purchasing the pro version from the App store separately will require me to re-enter all the transaction. However, after paying the app does not update itself even though I pressed "Restore Purchased" in the setting. I tried to contact the app developer but its server is not responding. I don't want to pay twice so I ended up, feeling cheated, have to write this nasty review here to warm other users. Sigh.
Review by why_cheat_my_money on Pocket Expense 6.