If your Adalo account is hacked and access is lost, you haven’t necessarily lost everything. First, contact Adalo support immediately—they may help recover your account if you verify ownership. Adalo doesn’t automatically back up your app versions, but if you’ve exported your app (e.g., for Android), that APK or build can serve as a partial reference, though not for editing in Adalo. To prevent total loss, regularly back up your app’s data and design manually or clone the app within Adalo. Enable strong security measures (like 2FA) to reduce the risk of losing access entirely.
@LuckyTravel I would advise to contact Adalo directly to get the information about the possible options for you.
There were some possibilities to recover deleted app before (this should be done really quick), but I am not aware if these policies are still in place and what is the possible timeframe. The best people to ask are in Adalo Right Desk.
Otherwise - you’ve received some good advices about making backups of your data.