Where Does the HKK App Store Data?
HKK Handelskrankenkasse keeps login session and mailbox cache in private storage on both phones. Letters sync after login.
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Handelskrankenkasse ships its service app in private app storage on each phone. Android holds session and mailbox cache under its own package folder. Letter case in that folder name matters during file hunts. iOS uses a per install container with a GUID name.
Letters sync from servers after login, so local files are mainly session and cached PDFs. Folder copies miss the encrypted session and force a fresh login. Deleting storage while logged in ends the session. Export sick notes and proofs as PDF inside the mailbox before wiping, then re authenticate.
Where HKK stores this, by platform
/data/data/de.hkk.hkkApp
Private session and mailbox cache for the verified hkkApp package. Note the camel case. Documents sync from HKK servers.
/var/mobile/Containers/Data/Application/<guid>/Documents
GUID container for the HKK service app (App Store ID 1267289367). Bundle unverified; quote the numeric ID.
Frequently asked questions
Do HKK documents survive reinstall?
No. Letters sync from HKK servers after login on the new phone. Local data holds session and cached PDFs only. Re authenticate with the usual credentials to restore the mailbox view.
How do I back up HKK documents?
Export sick notes and bonus proofs as PDF from inside the app before wiping. Manual folder copies miss encrypted session stores. Records stay with the insurer and return after login.
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