Forgettable: for the things you always double-check

In Harry Potter, Neville gets a Remembrall: a glass ball that turns red when he has forgotten something. That was my working name for this project, and it’s still written on the first dashboard screen I designed. Forgettable is the version for real life. It reminds you to check the doors, the oven and the lights at the moment it matters, then remembers that you did.

The problem

People forget, and then they’re nervous all day. Did I close all the windows? Did I switch off the lights? Did I lock the car? You can’t check from the office, so the doubt just sits there. What I wanted was peace of mind.

What I believe

Reminders only work if they come by themselves. If you have to remember to open a reminder app, you’ve already lost. So Forgettable reacts to what happens around you: you change location, you change or lose your Wi-Fi, the time comes. That’s the whole point: you can’t forget, because you don’t have to remember to check.

The second belief is that this kind of forgetting is shared. At home it’s never just you. You can share the list with the people you live with and see it together, so you don’t have to keep asking “did you check the oven?”

How it works: the phone notices, you don’t have to

Every item can have any combination of three triggers.

Leaving or arriving somewhere. You save a place, and the phone’s own geofencing watches a 150 m circle around it. Forgettable isn’t tracking your route; iOS and Android wake it only when you cross the edge, even when the app is closed. Items at the same place are grouped, so leaving home gives you one notification (“Leaving Home? Did you check: Lock house doors, Oven check”) instead of three.

Losing or joining your Wi-Fi. Dropping off your home Wi-Fi is a strong sign you’ve left, and it works indoors where GPS doesn’t. Android handles it natively. iPhone doesn’t let apps watch Wi-Fi, so the app ships Shortcuts actions (“Wi-Fi Disconnected” and “Wi-Fi Connected”) that a one-time automation calls.

A time, or a real alarm. Once or every day. For the things you really can’t miss, iPhone (iOS 26) rings a proper AlarmKit alarm that cuts through silent mode, with a Checklist button that opens the app.

Everything else serves that one moment

When a reminder fires, the next question is always “did I actually do it?” So each item’s detail screen shows when it was checked (“Checked today at 08:12”) and can hold a photo of the locked door or the oven dial. Siri answers the same question: “Did I check Lock house doors in Forgettable?” Interactive widgets let you tick items on the Home Screen, and right after you leave they show only what’s left (“Leaving Home · 1 of 3”).

Shared households sync the list between phones. No email or password, just an invite link or code. The server stamps who checked what, so the list can say “Anna locked the door at 08:12” and nobody has to ask.

Setting things up had to be quick too. You can add an item step by step, one question per screen, or in a Matrix view where location, Wi-Fi and time sit on one screen and you set only what you need. Long lists split into sections like Hall and Kitchen.

The part I’m proudest of: the documentation

We documented everything, down to the smallest detail. The website at https://forgettable.sevcovicp.workers.dev/ has three jobs. It’s the landing page that explains the app. It’s the support site, with step-by-step help guides for the Wi-Fi Shortcuts setup, your own Siri phrase, widgets and Android permissions, built from real screenshots of my iPhone. And it holds the privacy policy, written from what the app actually connects to: every permission, every service, what stays on the phone and how to delete your data.

The app links into the same guides from its Wi-Fi setup screen and from Settings, so help is one tap away where you need it.

https://forgettable.sevcovicp.workers.dev/help

How I worked

I designed the screens in Figma: the welcome glow, the intro with the illustration, the dashboard, the add flow, the colors (#D0BCFF on #1C1B1F), Poppins and Material Design 3. Then I built it with Claude Code. I directed every feature and every change, reviewed the screens as they came together, and tested on my own iPhone. Claude Code wrote the code: the Vue 3 and Varlet app, the Capacitor native layer (14 Swift and 14 Java files for geofences, alarms, widgets, Siri and Wi-Fi), the Supabase backend for households, and the website. The whole thing, from my first Figma screens to the app running on my phone, took about a day and a half.

What’s next

Light mode. More precise reminders, so people don’t have to climb back up the stairs because the reminder came too late. And I want people to tell me what to build next, so the app and the website link to a public feature request board. Once it’s out, I’ll watch what people add and how they set it up, so I can make setup easier for them.

What this changed for me

I wanted to build this for a long time, but I didn’t have the skills. AI and Claude made it possible. I’ll definitely keep building.