Treating at home means the storeroom is a spare bedroom, and the stock manager is me. Every session eats the same set of things — bags, a cartridge, needles, saline. Miss an order and it's not an inconvenience later, it's a missed treatment now. For a long time I "managed" this by opening the cupboard and hoping.

The question I actually needed answered was never "how many bags do I have?" It was quieter than that: how many more sessions can I run before I have to reorder? So I taught the app to answer it for me.

Inventory screen listing consumables with current stock and a coloured status dot per item
Green, amber, red. I only have to notice the colour. (Synthetic data.)
Supply-rates sheet setting per-session usage and a target buffer quantity for each item
I told it once how much a session uses, and what buffer I want.
Apply-delivery sheet with stepper controls to confirm the quantities that actually arrived
When a delivery lands, I tick off what actually arrived.

It counts so I don't have to

I set one thing up: how much each item a session uses, and how much I like to keep spare. That's it. From there the app quietly does the arithmetic I used to do on the cupboard floor — turning stock into a plain "about this many sessions left," and a coloured dot so I can tell in a glance whether I'm fine, should think about ordering, or need to act today.

Trust, but verify the delivery

The part that keeps the count honest over months is small and unglamorous: when supplies arrive, I don't assume the order came in full. I confirm what actually turned up and adjust anything short or over. Only then does the stock go up. It's the difference between a number I glance at and a number I believe.

Since supplies are eaten by treatments, logging a session can nudge the count down on its own — so the number stays live without me tending it. The whole feature is designed to be forgettable. I don't want to think about bags. I just want the cupboard to never surprise me again.

Next: the notes I've learned the hard way — the alarm at 6am, and what to do about it.