Release notes
Every version of Kern, newest first. The App Store only shows the latest one; the rest are kept here.
0.5.8 · November 2026
Two quiet changes.
Setup now ends with a single line about counting more than one thing. "No thanks" is the same size as "Look", it appears once while you are setting up, and it never comes back.
And Kern no longer asks you to rate it between ten at night and six in the morning. Opening a sobriety counter late is not a moment to be asked for a favour.
Nothing about your count changes.
0.5.7 · November 2026
Kern now speaks Japanese.
The whole app is in Japanese — the day count, the milestone words, the notifications that arrive on day 7 and day 90 — and so is its App Store page. Day counts follow Japanese counting, not English's.
Nothing about your count changes.
0.5.6 · October 2026
Starting over no longer celebrates a streak you just ended.
If you logged a slip on the day it actually happened, Kern could meet you with a milestone celebration for the count you had only just reset. It doesn't any more — a milestone is marked when you reach it here, not when the date you set has already gone past it.
Reduce Motion now quiets every animation, not most of them. And if you use it, milestones give you the same gentle tap as everyone else. That was missing.
Nothing about your count changes.
0.5.5 · October 2026
Kern now runs natively on the iPhone Duo.
Folded, it uses the whole outer display. Opened, it uses the whole inner one, in both orientations — the date picker sits beside the question instead of under it, and nothing stretches across the width.
Nothing else changed: the same count, the same milestones, still nothing collected.
0.5.4 · October 2026
A Diagnostics row in Settings.
It shows a handful of counts kept on this iPhone — launches, offers seen, purchases — so a problem can be described instead of guessed at. Nothing is sent anywhere, and there is no account or identifier attached.
Nothing about your counts changes. If Kern helps you, a rating helps other people who are quitting find it.
0.5.3 · October 2026
Small fixes and polish. Nothing about your counts changes.
If Kern helps you, a rating helps other people who are quitting find it.
0.5.2 · October 2026
Money, from the first day.
- Adding a count now asks what it used to cost you each week, so money not spent shows from day one. Leave it empty to skip it.
- Your main count now has Edit on its own screen too (Counters → tap it → Edit): name, start date and weekly spend in one place, like every other count.
- The money section of a count's editor, and a few VoiceOver hints, were still in English in other languages. They're translated now.
- Layouts that fit large text sizes, iPhone SE and the new iPhone Duo — and Restore purchase now tells you what it found.
Nothing about your existing counts changes. If Kern helps you, a rating helps other people who are quitting find it.
0.5.1 · September 2026
Small things, done properly.
- Tapping a milestone notification now opens the count it was about — not whichever you looked at last.
- Money not spent works on every count, not only the first. Set it from the count's editor.
- The background reaches the edges of the screen when you have more than one count.
- "Need help now?" is one tap away at the moment you log a slip, as well as in Settings.
- A milestone that arrives while the app is open is shown instead of silently dropped.
Nothing about your existing count changes.
0.5.0 · September 2026
Count more than one thing.
Some people are quitting two at once — a drink and a cigarette, a cigarette and a vape. Kern now holds as many counts as you need, each with its own name, start date and milestones. Swipe on the main screen to move between them.
- A widget that shows every count at once, and a small one for whichever you pick
- Each count gets its own reminders, named, so you know which reached the day
- Start over on any count, with the same honest slip date and undo
Your existing count stays exactly as it was, and free — along with every widget, milestone and your personal best. Keeping more than one is a one-time purchase. No subscription, ever.
0.4.0 · August 2026
Kern now speaks your language.
The whole app — the day count, the milestones, the notifications that arrive on day 7 and day 90 — is now in 17 more languages. Nothing changed about how it works. It just stopped being in English.
- Spanish, German, French, Portuguese, Italian, Dutch, Polish, Swedish, Danish, Norwegian, Finnish, Czech, Greek, Romanian, Hungarian, Ukrainian and Turkish
- Day counts follow your language's own grammar, not English's — "5 dní", not "5 den"
- Dates, numbers and currency follow your region
As always: no account, no ads, no data collected.
0.3.0 · July 2026
Kern on your Lock Screen.
Your day count now lives where you actually look — a small ring, a wide panel, or a single line above the clock. Glance without opening anything.
- Lock Screen widgets — circular, rectangular and inline
- Start over now asks when it happened, so a slip you log days later doesn't cost you the days since — and there's an Undo if you tapped by mistake
- Optional "money not spent", off until you set a weekly figure
- New milestones at 150, 273 and 730 days, so the long stretches aren't silent
- Progress now measures the stretch you're in, not the whole count
As always: no account, no ads, no data collected.
0.2.0 · June 2026
Share your milestones.
You can now turn any day count into a quiet, shareable card — straight from a milestone, or any day from the main screen. Made on your device, nothing leaves your phone.
- Shareable milestone cards
- A share button on the main screen, share any day
As always: no account, no ads, no data collected.
0.1.1 · May 2026
A bigger widget.
- Added a medium-size home-screen widget
- Tapping "Rate Kern" in Settings now opens the App Store review composer
0.1.0 · May 2026
Kern's first release.
A day counter on your home screen: one number, milestones from day 1 to 1000, a personal best kept across a reset, and a label you name yourself. No account, no ads, no data collected.