The short version. DEM needs an email account, and your equipment register syncs to it so the same data reaches your other devices. Photos and certificate files do not leave your device — they move only through a backup or a ZIP export that you create and send yourself.
We do not sell data, we do not advertise, and we do not share your register with anyone.
DEM is developed by Mykhaylo Osypov, trading as Kuka Lab. Contact: kukalab@icloud.com.
Unlike some of our other apps, DEM is not usable without an account. You register with an email address and a password, and you must confirm the address before your data will sync. Authentication is handled by Google Firebase Authentication.
What that means in practice:
Your register — stores, items, SWL values, certificate references, inspection and expiry dates, quantities, remarks, flags and the movement history — is stored on your device and copied to Google Cloud Firestore, in a document that belongs to your account and no other.
Access is enforced by security rules on the server: a request must carry a signed-in identity, that identity must match the document's owner, and the email address must be confirmed. There is no shared access, no fleet-wide view, and no administrator path into your data.
Files do not sync. Photographs you attach to an item and the certificate documents you store are written to your device's app storage and stay there. They are not uploaded to us or to anyone else.
They reach another device only when you deliberately move them:
.dem backup file, which you export and store or send yourself;Where those files go afterwards is entirely your decision, and outside our control.
Nothing is read in the background, and nothing is uploaded from these sources.
DEM uses Google Firebase (Authentication and Cloud Firestore) to run the account and the sync. Google processes that data on our behalf, under its own terms and security standards. No other third party receives your register.
Your data is kept for as long as your account exists. Write to kukalab@icloud.com and we will delete the account and its stored register. Deleting the app from your phone removes the local copy and every file attached to it — including any photograph or certificate you have not backed up. Back up first.
Under the GDPR and comparable laws you may request access to your data, its correction, its deletion, or a copy of it in a portable form. The .dem backup already gives you the last of those at any moment, without asking us. For the rest, write to us.
DEM is a professional tool for seafarers and is not directed at children under 16.
If we change how data is handled — in particular if certificate files ever begin to sync — we will say so here and in the app before it takes effect, not afterwards.