Donald Hi Donald, your bank account won't be deleted if you just stop using your phone and/or remove the bunq app from your phone. But, the bunq app is the only way to access all functionality of your bank account at bunq. Therefore, when you stop using the app, you will stop receiving important communication, you won't be able to fully manage your payments (accept/reject direct debits, 3DS etc.) and more.
Therefore, my personal view would be: No, it's not feasible to keep using your bunq account without using the app.