Tired of asking
"what time is it there?"
The right time. The right weather. The right moment to reach out.
For every person you care about.
❤️ Your People
Can I call right now? See everyone you care about in one beautiful list — with their local time, weather and the traffic-light status for each person.
Green 🟢 means go.
Red 🔴 means bad timing.
📱 Beautiful Widgets
No tap needed. Pick a single person or a list. Their time, their availability. Visible the moment you wake your phone.
🧮 Event Calculator
Plan a call across time zones without the spreadsheet. Enter a date and time in any zone — and instantly see it in your own and in every person you care about. Then share the invite, one tap.
🔎 Best Time Finder
The hardest part of an international call: finding a time when everybody is available. Pick the people for your meeting and let ONE WATCH find the green window when everyone is reachable. The whole group, awake at once.
⚙️ Made to fit your habits.
Toggle 24h or AM/PM, °C or °F, dark or light, digital or analog clock. Three app icons, many languages, one travel mode. ONE WATCH bends to your habits — not the other way around.
⌚️ Apple Watch
From your friend in Tokyo to your client in Los Angeles. Always one glance away — on your iPhone and your Apple Watch.
Designed to feel
right at home.
ONE WATCH was built to feel like it belongs on your iPhone. Three icon styles to match your setup. Home screen widgets that blend right in. Clean, calm, and ready for any time zone.
My partner is in Singapore for the next two years. Having his face on my home screen with his local time makes the distance feel smaller. It's a tiny thing — but it matters more than I expected.
Susan M.
I manage a team across five countries. The Best Time Finder saved me hours of scheduling — and made me realise I was always asking the same person to take the early call. Now I rotate fairly. Small feature, big impact.
Richard P.
Our kids are in Toronto, Berlin and Melbourne. The app shows all three on my watch face. I always see there time. The family feels a little less scattered now.
Maria S.
I have a client in Dubai. The app put his local time right on my home screen — no more awkward 6am pings, no more googling before every text. Just instant clarity.
Peter T.
Built with care.
For people who care.
Born in Austria. Designed for everyone with friends, family or clients across time zones.
No ads, no tracking, no corporate nonsense — just a beautifully crafted time‒zone companion built by people who actually use it every day.
Light mode.
Built for bright mornings. Every detail crisp and clear.
Dark mode.
From late-night calls to early-morning check-ins.
FAQ
Everything you need to stay in sync across time zones.
How many people can I add?
Does it adjust to my time zone?
What languages are supported?
How does the "right moment to call" work?
Is my data private?
How does the purchase work?
Does ONE WATCH work offline?
Does ONE WATCH support Apple Watch?
Is there an Android version?
Get in touch.
Got feedback, a feature request,
or just want to say hi?
We'd love to hear from you.