Sorry, I meant indexeddb not localStorage, but yeah a cleanup would clear it as well. Mere supports data export/import though, and data loss hasn’t been much of an issue yet in practice.
The goal is to be able to back up and restore encrypted blobs to external storage (s3, Dropbox, etc) to mitigate this and enable sync across devices, but this isn’t implemented yet.
I mean, if you use open source apps that build on top of healthcare interoperability data formats like HL7 FHIR, you can get automated data pulls from EHRs while being able to just switch apps later.
Fasten Health (mentioned in a previous comment) is probably your best bet. It automatically syncs with your EMR and pulls your lab results automatically. You can manually upload your own data in a bunch of cases.
If you’re looking for another open-source and free alternative, I’m building Mere Medical which is not quite as developed as Fasten but takes a local-first approach and still connects to 2000+ healthcare institutions.