We’ve added a new “Aqua Mail Account” sign‑in. This account system is for Premium (subscription) users so we can provide account‑based licensing, easier device migration, centralized control, and future cross‑device features. This option is available under Settings > Sign in
Important for Pro (one‑time purchase) users:
You keep all the features you already had. Nothing is taken away.
The new account sign‑in is not intended for Pro users. If a Pro user signs in without an active Premium subscription, the app switches to the Free license, because the license is then taken from the signed‑in account (which has no subscription).
What to do if you’re Pro and the app shows “Free” or "Google Play error" after signing in:
Go to the account page and press on "Delete account".