I went in expecting the usual beta routine: make an account, verify your email, then stare at an empty dashboard. None of that here. You land on /reports, it doesn't ask you to sign up, and it tells you upfront that your data stays in your browser and nothing medical goes to their servers. I checked, and it's actually true, everything I entered sat in local storage. For a health tool that's a real plus. I skipped the PDF upload and added a result by hand. The biomarker picker has search, the unit dropdown makes sense, and the moment you save it walks you through picking biological sex and pops a little "your first result is saved" note that points you to the dashboard. That's already a better welcome than most tools bother with. The dashboard is clean. Markers grouped by panel, values by date, and clicking one opens a panel with the reference range, a small chart, and a link back to the original result. Refreshing /trends or opening it from a direct link works fine, which sounds basic but plenty of apps get it wrong. What I liked: - No account, no email verification, data stays on your device, and it genuinely does - After you save the first result there's a small flow guiding you along, it doesn't leave you stranded - The marker detail popup does its job: reference range, mini chart, link back to the source - Refreshing pages and sharing direct links both work - CSV export actually gave me my own data, not some demo table What I didn't like: - Add a single result and the AI insights section falls over. The request 500s in the background and you're left with an empty "Insights" area and no explanation. New users will hit this on day one - The profile dialog keeps showing "Female" selected even after I picked "Male" and saved. It stores the right value underneath, but on a tool that sets reference ranges by sex, seeing the wrong one every time you open it doesn't inspire confidence - Only two options for biological sex, no skip button - A single data point is drawn as one lonely dot inside a shaded band. Expected, but the "spot your trends" pitch promises more than a first import delivers - The CSV came down with a random .tmp name instead of something readable - The demo chart popup on the homepage dropped the oldest date from its axis even though the table still had it The privacy approach and the import-then-see-it-on-a-dashboard flow are genuinely good. The AI insights, the thing the marketing leads with, is the most unfinished part. 3 out of 5 for now. I'd use it to keep my results in one place, I wouldn't trust the insights yet.