Kern

One day at a time.

Sobriety isn't a streak to optimize. It's a series of small, private decisions — made over and over — that nobody else needs to clap for. Kern is built around that idea.

It doesn't ask for your attention. There are no daily reminders to log in, no leaderboards, no community to perform for, no streak you can break. It opens to a single number. The number you chose. That's the whole app.

The milestones — seven days, thirty, ninety, a year — arrive without fanfare. A short message. A small acknowledgment. Then back to the day. No confetti, no badges, nothing to share unless you decide to. The recognition is for you, not for an audience.

It's a tool, not a coach. A glance, not a feed. The app's job is to be there when you reach for it — on your home screen, in a small widget, on your lock screen — and to disappear when you don't.

What Kern does

• Your day count on the Lock Screen — a small ring, a wide panel, or a single line above the clock.
• A clean hero number that grows with each day you choose yourself.
• Quiet milestones from your first day to a thousand — a short message, then back to the day.
• A home-screen widget that fits next to your weather and calendar.
• Starting over, honestly — log the day it actually happened, and undo it if you tapped by mistake.
• A personal best preserved across resets — relapse doesn't erase the days you already lived.
• An optional note of what you haven't spent, off unless you turn it on.
• An editable label, so the counter says what you're actually counting.

Counting more than one thing

Plenty of people are quitting two things at once — a drink and a cigarette, a cigarette and a vape. Kern is free for your one thing, forever. Keeping more than one is Kern Pro: one payment, no subscription, nothing that renews.

• As many counts as you need, each with its own name, start date and milestones.
• Swipe on the main screen to move between them — one number at a time, still.
• A widget showing every count at once, or a small one showing whichever you pick.
• Each count gets its own reminders, named, so you know which one reached the day.
• Each count can show its own money not spent — what a drink costs isn't what a vape costs.
• Still no account, still no server, still nothing collected.

Your existing count and everything around it — widgets, milestones, money not spent, personal best, editing your own dates — stay free. Nothing you already have moves behind the purchase.

How it works

• Set your date. Today, or the day it actually started. You can correct it later without losing anything.
• Name it what it is. "alcohol-free", "smoke-free", whatever is true for you. The word "sober" never appears unless you write it.
• Put it on the glass. Add a widget to the Lock Screen or home screen so the number is there without opening anything.
• Start over honestly. Log the day the slip happened, not the day you admitted it. Your personal best is kept, and a mis-tap can be undone.
• Add another count from the Counters tab, if you are working on more than one thing.

What Kern doesn't do

No accounts. No community feed. No notifications outside your milestones. No analytics, no servers, no third-party tracking. Apple's privacy questionnaire for Kern reads "no data collected" because that's true — everything stays on your device.