If you don't have any backup you can recover your wallet you should had seed phrase save from your computer or notepad if you don't have any backup i think its impossible to recover your wallet there is no other way. but if you have the seed phrase you can easily recover it..
Better to find your seed phrase somewhere in your computer and maybe you save it its a 12 word phrase and you can recover it even in other wallet like electrum..
No seedphrase, it was just on the mobile phone. Now I am feeling uneasy. Don't you think there could be a hidden dataset from the app on the mobile phones memory?