You should not: promises are just words. Still, there are a few verifiable signals.
From the practical point of view, stealing passwords is a poor business idea. Just like any other illegal high-risk activity, it would eventually be exposed and result in jail time.
Selling the app, in contrast, is a safe, legal and reliable business model that builds reputation.
We sell the app.
By design, KeePassium never “phones home” for any reason. You can check this by monitoring the network traffic on your device.
Database synchronization with cloud providers is performed by their own apps. KeePassium will never ask you for your Dropbox/OneDrive/NetxCloud account details.
KeePassium does communicate with AppStore servers, only to manage the in-app purchase of the premium version. Premium subscription status is verified directly on device. Server-side verification would have provided a stronger anti-piracy protection, but privacy is more important: KeePassium never “phones home” and you can verify this.
Best of all, you don’t have to trust us! For the maximal assurance, follow these steps:
(If you go this way, please be nice and buy premium to support future updates and maintenance.)