VialMath product walkthrough Change one input. Every dependent number updates. You enter your own protocol. VialMath has no built-in compound library, no presets, and no dosing recommendations. Enter the amount of water you actually used; VialMath does not choose a reconstitution amount. Here, the entered dose moves from five to six milligrams. At fifty milligrams per milliliter, the displayed U-100 draw changes from ten to twelve units. Today keeps each scheduled entry explicit. Mark it Done or Skipped, and the app preserves that history instead of guessing what happened. The same entered change updates vial remaining, projected run-out, and the reorder date, while ended schedules and unavailable projections stay honestly blank. Protocol data stays on this device. There is no account or sync. Backups and exports remain under your control. Activation and version checks may use the network. Free tracks up to two compounds, and oral entries never count toward that limit. Power removes the tracked-compound limit for $39 once. No subscription. Start free with no signup. Or unlock Power once, when you need it. VialMath. Change one thing. Everything updates. Synthetic example only. VialMath calculates from user-entered values and does not provide compounds, presets, dosing recommendations, or medical advice.