#health tracker Startups & Tools

For people managing their own injection routines, the math and logistics can quickly become error-prone. Converting a vial's concentration and the volume of diluent added into syringe units, tracking which injection site was used most recently, and maintaining a coherent record across notes apps and spreadsheets creates friction that compounds with every dose. Vialmetry addresses this by consolidating the entire workflow into a single logbook designed specifically for this purpose. The app keeps track of vials you prepare—recording the strength, water added, mix date, and remaining volume—and calculates the amount of solution needed based on your target dose. Rather than hiding these calculations, Vialmetry displays the arithmetic behind every number, letting users verify the working themselves. This transparency is uncommon in health-tracking software and signals a product built for people who want to understand, not just execute. The feature set reflects this precision-focused ethos. A body map overlays thirty injection sites across front and back views, automatically rotating based on a user-defined rest period, removing the guesswork from site selection. The app supports custom schedules with reminders that can remain silent on the lock screen, and it logs every injection with its corresponding site, dose, and cost. Historical entries can be corrected or deleted, with the vial count adjusting accordingly. For clinical coordination, users can print summaries or export to CSV. The privacy model is notably strict: no account creation required, no ads, no tracking, and full offline operation. An optional cloud backup exists but only syncs when the user initiates it, and Face ID or fingerprint locks provide device-level security. This design avoids the creep of data collection common in health apps. Vialmetry explicitly disclaims being a medical device and states it never suggests doses, compounds, or schedules—functions reserved for clinicians. The formulas and methodology are published publicly, underscoring the approach. The app is free across iOS and Android, removing cost as a barrier to adoption. The product targets a specific, self-aware audience: people already managing their own regimen who need better tools for the arithmetic and record-keeping, not people seeking medical guidance.