Known, unknown, and estimated
- Known: starting amount, concentration, dates, and withdrawals that were recorded accurately.
- Unknown: unlogged waste, dead space, measurement error, spills, and actual physical remainder.
- Estimate: remaining amount and days of supply calculated from the recorded inputs.
The clearest SERP opening in this set
The live United States Google results for “vial inventory tracker app” are mostly generic inventory products, controlled-substance systems, discussions, and one Glapp announcement about compounded tirzepatide. Few pages directly answer the personal peptide/TRT vial-record intent. This is the least crowded and most differentiated landing opportunity of the seven.
The vial record to maintain
| Field | Record type | Limitation |
|---|---|---|
| Vial ID and compound | Known if entered correctly | Labels and formulation still require verification |
| Starting amount and concentration | Known from the entered source | Input error propagates into every calculation |
| Reconstitution or open date | Known timestamp | Does not determine safety or beyond-use date |
| Logged withdrawals | Known event records | Unlogged waste and dead space remain unknown |
| Remaining amount and runway | Estimate | Not a physical measurement or refill recommendation |
Why dose events and inventory must connect
Separate logs drift. When every completed event references a specific vial record, the remaining estimate can be recalculated and audited. Corrections should flow through the calculation without erasing the original event history.
What a vial tracker cannot determine
It cannot determine sterility, potency, contamination, storage integrity, a beyond-use date, or whether a product is appropriate. Those are not inventory-math questions. The tracker should preserve source details and direct users to qualified professionals and official labeling where applicable.
Product source: Halflife App Store listing. Browser tool: vial runway calculator.
Keep the complete record in one place
Halflife - Peptide & GLP-1 Log organizes logs, schedules, vial inventory, injection sites, symptoms, and clearly labeled model estimates on iPhone.
Download Halflife - Peptide & GLP-1 Log