FAQ
Questions, answered properly
If yours isn't here, the model page goes considerably deeper on the scoring, and the invite form has a free-text box you're very welcome to put a question in.
The product
What is this, in one paragraph?
Health Index is a personal health tracker. You log the things you do — the good ones and the bad ones — and it turns them into one bounded score that reflects where you are right now. The bit that makes it more than a counter is that repetition decays: the more often you log the same thing, the less each additional one is worth. So the score rewards breadth over grinding one easy habit into the ground.
How is it different from a habit tracker?
A habit tracker asks whether you did the thing. This asks what all of it added up to. Repeating the same entry gives diminishing returns, negatives count against you, and the index has no streak in it at all — a repeat counts for less because it's a repeat, not because you missed a Tuesday. So the number tells you how you're doing rather than how obedient you've been.
Are there streaks?
There are streak badges — a run of days logged, a run of days with nothing negative on them, and a run of days the score rose. So yes, and it would be daft to pretend otherwise. What there isn't is a streak that punishes you: they're measured against your best run ever, so a lapse never revokes a tier you've already earned, and there's no chain sitting on the home screen going red. The index itself doesn't use streaks in any form — its decay counts repetitions rather than days, over a rolling two weeks. So a gap never counts against you: take a fortnight off and anything you'd worn down by repeating is simply worth full value again when you come back to it.
I've abandoned three trackers already. Why would this be any different?
Because the usual failure isn't willpower, it's that setup demanded more than the first week gave back. There's nothing to set up here — no goals to declare, no habit list to define, no wizard. You log one thing, and that's the onboarding done. Depth arrives later and only when you've given it a reason to: a label you keep logging offers to become its own one-tap chip, the quick-add row reorders itself around what you actually do, and help shows up next to the thing it's about. Whether that's enough to keep you is a fair question and we're not going to pretend to know. But you'll find out in about thirty seconds rather than after an evening of configuration.
Does it get more complicated the longer I use it?
It gets deeper, which isn't the same thing. Nothing new appears until you've given it a reason to: a label you keep logging offers to become its own chip, and help escalates from a tip to a pointer to a walkthrough only if the simpler version wasn't enough — and the walkthroughs advance when you actually perform the step rather than when you press Next. There's also no settings page to work through. You recolour a tag by long-pressing it, rename it in place, and arrange the tray by moving things around. Configuration sits next to the thing it configures. If you ignore all of it, you still have a label, a number and an honest read, which is the whole product.
Can my score go down?
Yes, and that's rather the point. Negative entries subtract, and because the index is bounded and reflects a period rather than piling up forever, a rough stretch shows up as a lower number. A score that only ever rises isn't measuring anything — it's just applauding.
What does it actually tell me?
More than the number. Trends gives you your index over time plus what moved it — your best and worst days, and which tags you're genuinely active in rather than the ones you meant to be. Then any single thing you track opens into its own set of views: how often you really log it, the weekday you're strongest on, the hour it actually happens, whether it's rising or falling against the period before, and a frequency chart you can run from a week out to three months. None of that asks you to log anything extra. It's all worked out from the entries you were making anyway.
Do I need a wearable, or to connect anything?
No. There are no integrations and nothing is inferred from a sensor. You log what you did. That's a deliberate choice rather than a feature we haven't got round to.
Does it work offline?
Yes. It's a web app that installs to your home screen and carries on working with no connection at all, because your data is sitting on your device rather than being fetched from somewhere.
Is there an iOS or Android app?
Not in the app stores. It's a progressive web app: you open it in your browser, add it to your home screen, and from then on it opens full-screen with its own icon like anything else on there. In daily use it behaves like an installed app. It just didn't come through a store.
The beta
How do I get in, and how long is the wait?
Request an invite and you're in the queue. Batches go out on no fixed timeline — the limit isn't the sending, it's how much feedback one person can actually read and act on. The pool grows at whatever rate keeps that honest.
What's expected of me?
Use it, and say so when something is broken. That's the whole deal. There's no minimum activity, no engagement score, and nobody keeping an eye on whether you've opened it lately.
How do I report a bug or send feedback?
From inside the app — there's a feedback option in the menu. It's in-app rather than on this site on purpose: a report that arrives with the app's version and context already attached is worth about ten of the same report typed into a form that knows none of it.
Will my data survive to the real release?
That's the intention, and the app is built for it. Stored data carries a schema version and an ordered chain of migrations, so an older install upgrades forward instead of being wiped. There's also a full export you can take whenever you like, and restore from. Nobody honest promises zero data loss during a beta — but the machinery for avoiding it exists and gets exercised on every release.
What does it cost?
Nothing during the beta. No card, no trial clock ticking down, no upgrade prompt at the worst possible moment. What happens after the beta hasn't been decided, and pretending otherwise would be a strange way to start.
Privacy, and who's behind it
Where is my data stored?
On your device, in your browser's local storage. No account is required and there's no user database, which is exactly why it works offline — there's nothing to fetch, because none of it was ever anywhere else.
So what do you actually collect?
Three things, and only three. The email you give us when you request an invite. Any feedback you choose to send from inside the app, which is text you wrote and knowingly pressed send on. And anonymous usage statistics, which you can switch off in Settings — bucketed counts tied to a random identifier that isn't linked to your account. Your log entries aren't on that list, and there's no version of this where they are.
Why didn't this site ask me to accept cookies?
Because there's nothing to accept. No advertising cookies, no cross-site tracking, no third-party embeds, and the one analytics script is cookieless. Putting a banner up anyway would just be set dressing.
Is this medical advice?
No. Health Index is a personal tracking tool, not a diagnostic or treatment device, and nothing in it is a clinical judgement of any kind. For medical decisions, talk to someone qualified to make them.
Who made this?
One person, independently — no investors, no team, no ad model, no growth target to hit by Q4. It started as a tool built to fix its author's own frustration with existing trackers: they all counted, none of them weighed. The scoring model is the part that took the longest to get right, and it's the part worth judging it on. There's more of the story to tell later; for now the product is the more interesting half.