SubZeroHero: Knowing What's Actually in the Freezer
Most freezers are a graveyard of good intentions. Ours was no exception. You buy something, freeze leftovers and pre-cooked meals, push it to the back, and six months later you’re scraping ice off an unidentifiable bag wondering whether that’s the lamb from Easter or something older and sadder.
My wife and I tried to solve this — repeatedly. None of it stuck. So we built SubZeroHero, a small PWA that finally fixed it for us.
What we tried first
Before any code, we did what most households do: we tried the analog approach.
- A list pinned in the kitchen. Worked for about two weeks. Then someone took out a pack of mince at 6pm in a hurry, didn’t grab the pen, and the list was permanently out of sync.
- A whiteboard with magnets directly on the freezer door. Looked great. Same problem. Plus the magnets fell off whenever the door slammed.
The pattern was always the same: the system worked until the moment it was actually inconvenient to use, which was every moment.
What SubZeroHero does
It’s a freezer inventory for a household, built as an installable PWA — no App Store, no install friction, just “Add to Home Screen” and it behaves like a native app on the phone.
The shape of it is deliberately small:
- Add an item in a couple of taps — name, quantity, date frozen.
- See what’s in the freezer as a single list on the home screen.
- Restock list for items that have hit zero, so the next grocery run isn’t guesswork.
- Households — my wife and I share the same inventory in real time. Whoever pulls something out updates it.
That’s it. No barcode scanning, no recipe suggestions, no AI telling us to eat the peas. The whole point was to remove friction, not add features.
Why the PWA was the unlock
The thing that made it finally stick wasn’t the data model or the UI. It was that the app lives on the home screen of the phone that’s already in your hand when you open the freezer.
- No app store review, no install prompt, no “do you want to update” nag.
- Opens instantly, works offline-ish, looks like an app.
- Same icon on both our phones, same data behind it.
Every previous attempt failed at the same point: the moment of friction between “I’m taking something out of the freezer” and “I’m updating the record.” A pen on a fridge list is too far away. A note app is too many taps. A magnet is too fiddly. A home-screen icon you tap once isn’t.
Where it lives now
SubZeroHero is running in our household and quietly doing its job. The freezer is no longer a mystery box. We know what’s in there, roughly when it went in, and what we’re out of — without thinking about it.
The “marketing” website with more information will be up in a little while and we are planning for a closed alpha for friends and family soon after. During the closed alpha, interested folks will be able to sign up for a closed beta which will be followed by a public beta. We’ll keep you updated on the progress here and also on the “marketing” website once that is up.