92 days.
Count them for real.
The winter arc starts today. One tap every 30 minutes, and by evening you know if your day counted. On December 31, you'll have the record of all 92.
On Android? The app is coming. Meanwhile, Halff works on the web. Start on the web →
HalffIt's 11 pm. What did you do today?
Every winter you promise yourself a more disciplined version. Without a record, on December 31 you won't even know if you held.
No timer
to start.
One reminder, one tap
Every 30 minutes, Halff asks what you just did. On Mac, it opens, you click, it closes.
Paid you back, or cost you
On iPhone, one tap on the notification. Every half hour picks a side: full or hatched.
By evening, you know
A score out of 100, every day. You finally know where your day went.
Did it pay you back,
or cost you?
Every evening, a score out of 100. Green if you beat yesterday, red if not. No badges: a streak of days held, and that's it.
Your day is 48 half hours.
No more, no less.
Lose six a day: 3 hours. 21 a week. 276 hours by December 31.
By evening, they know.
And it changes everything.
“I thought I worked 10 hours a day. Halff showed me 5 hours of real value.”
“One tap, 2 seconds, it's gone. The only tracker I kept for more than a week.”
“My first report: 3 hours of scrolling in a day. I got my evenings back.”
What you're probably wondering.
How much does Halff cost?
€9.99 a month with no commitment, or €59 a year, that's €4.92 a month. On iPhone, 7 days free before the first charge. Lifetime access, €149 once, exists only on halff.io. One account for iPhone, Mac and web.
Where does my data go?
Your half hours live on your device. With your account, they sync encrypted between iPhone, Mac and web, visible to you alone. Never sold, never ads. On the site, traffic is measured without cookies, anonymously.
I bought on iPhone, do I get the Mac?
Yes. Open the iPhone app signed in to your account: your purchase attaches by itself. Then sign in on Mac or on the web with the same account, everything opens.
What if I miss a nudge?
No big deal. On iPhone, you drag your finger across the missed half hours and they paint at once. On Mac and web, a mouse drag.
Windows? Linux?
The web dashboard works everywhere. The native app exists on iPhone (App Store) and on Mac. Your account follows, your data too.
Why 30 minutes, and not 1 hour?
In an hour, attention drifts, you multitask without noticing, and you rationalise: "I worked the whole hour", when really 25 minutes were productive. 30 minutes is the compromise: short enough to correct fast, long enough to produce, simple enough to repeat all day.
Is it proven?
Yes. Simply knowing you'll record what you do increases attention, discipline and the consistency between intentions and actions. It's the self-monitoring effect, documented in behavioural psychology (Herren, 1989: productivity gains held 10 months later). What gets measured gets fixed.
Why no colours?
Because your day doesn't need a rainbow to be readable. A full box paid you back. A hatched box cost you. Green and red show up for one thing only: better or worse than yesterday.
Your winter arc starts
at the next half hour.
92 days, 4,416 half hours. Install Halff, live normally, check the report every evening. On December 31, you'll know exactly how many counted.