The ask
A lawn care owner needed to know what each crew had left in the sprayer and holding tank at the end of the day, and which treatment round it was mixed for. That information lived in text messages and memory, so leftover product went untracked and mixes were figured by hand at the tank.
What I built
A working mobile web app, not a mockup. Crews log their tank levels in a few taps, a calculator handles the mix, and the owner sees every truck at once.
The constraints became the spec
Used standing at the truck, one-handed, often in gloves or bright sun: one question per screen, with large tap targets.
Mistakes are easy to make in the field: each answered step collapses into a chip you can tap to edit, so nobody starts over.
Mixing math is where errors cost money: pick the round, grass type and square footage, and the calculator does the math. No one figures it in their head at the tank.
The owner needs the overview: a dashboard shows who has reported today and what’s left over from each round.
Every truck on one screen, plus who has reported today.
Answered steps fold into chips you can tap to fix.
Round, grass, square footage. The app does the math.
Try the prototype Demo data. Nothing you enter is saved. The Pin is 1397.
Status
Proof of concept, built and hosted in Replit. The company didn’t move forward, and the build stands on its own.
