Meridian for iPhone
Know when you
can call them.
The people you love are on other clocks. Meridian keeps their hours — sleep, dinner, the school run — and tells you at a glance who is callable right now, and when everyone is free at once.
Free during the beta · iPhone, iOS 17 or later · no account, no ads
Turn the bezel — it works here too
Right now, as you read this
LiveThe question
Can I call them right now?
Add the people who matter and pin each one to the city they actually live in. Meridian keeps their day rather than yours, and the People tab carries a short list of exactly who is callable this second.
Three states, not two — because dinner is not sleep
Give a person their sleeping window and as many busy windows as their life needs, each with your own label and the weekdays it applies to. A window can wrap past midnight, so Friday 22:00–01:00 still covers Saturday morning.
- Callable, Busy and Asleep — with the person whose window closes soonest at the top
- A countdown on every row: “closes in 42m”, “opens in 7h 15m”
- Sleep always outranks a busy window: asleep is asleep, whatever else is on
- Recomputed from each person’s own wall clock, so a clock change on either side never leaves a stale answer
- Set everyone’s hours in one tap, with a confirmation naming the exact hours — busy windows are left alone
When is everyone green at once?
The hardest version of the question is the one with three people in it. The overlap finder sweeps the next 24 hours in five-minute steps and shows the bands where every person you have ticked is callable — and it counts your own waking hours as a participant, so a window at 3am is never offered as an answer.
- Up to six shared bands, in your clock, each with its length: “18:30 – 20:15 tomorrow · 1h 45m”
- Your own hours are a participant you can toggle in or out
- The People screen leads with the same answer in one line
- When there is no shared band it says so, and suggests a smaller group
- Optional alerts when a window opens, or 30 minutes before it closes — off by default, capped per day, and never fired inside your own night
The instrument
Thirty-three faces, none of them a picture
Every face is drawn live in code from a recipe of colour and geometry rather than shipped as an image. It stays sharp at any size, and every part of it can be recoloured rather than swapped.
Eight of the thirty-three, drawn here from the same colour recipes the app uses. The full set spans five categories — Global, Traveller, Dive, Pilot and House.
One hundred and forty-four clicks
Take the ring between two fingers and it turns with a detent every 2.5 degrees — the pitch of a fine 144-click bezel — each tooth a sharp haptic and a recorded click. The ring is under-geared to 0.85 of your finger, so it drags with a little resistance instead of gliding. Let go and it springs to the nearest half-hour stop, the way a traveller’s bezel should.
- Three recorded click samples, rotated so repeats never sound identical, and a fast flick fires a burst of clicks rather than a single tick
- The grab zone is a donut over the ring alone — a drag on the dial face still scrolls the screen
- The 24-hour, dive and world-time rings turn. Fluted and polished dress bezels are fixed, as they are on the wrist
- The click is a system sound and follows the silent switch; haptics have their own toggle in Settings
- Turning the ring is a browse, never a setting — double-tap the dial to snap it home, and the world-time ring springs back on its own when you leave the clock
Lume that comes up after sunset
Set the lume to off, always, or after sunset. The sunset mode is worked out from the standard solar equations for your time zone — Meridian asks for no location permission and uses none.
- Lit lume glows in its own emission tint — cream paint can come up ice blue or green — while the metal, dial and text dim back, so the glowing parts carry the face
- A moon button forces it on, or snoozes it for twelve hours so the next sunset takes over again
- Bezel markings are contrast-corrected per half, so a bold colour choice never costs you legibility
A world timer that is right about daylight saving
Four of the faces carry a full world-timer: a band of city codes around a 24-hour disc with day and night halves. Each column is placed by that city’s live offset and recomputed on every render. A mechanical world timer's ring has no way to know about daylight saving; this one recomputes it.
- Up to 25 city codes on the ring, one label per hour column
- When daylight saving puts two cities on the same offset, the first listed carries the column; a column left empty shows a dim GMT offset rather than a gap
- Drag the ring to park a city under the marker and its live time appears below the watch
- A one-tap explainer covers how to read the ring and how the clock changes are handled
Build the watch you would have bought
Numerals, hands, bezel, edge finish, ten colours, the date window and the text on the dial. A live dial sits pinned above the options and updates on every tap, bezel and all, so you are never guessing what a change will do.
- Six hand styles, five numeral styles, five bezel constructions and three bezel edge finishes (on 24-hour and dive bezels)
- Ten colour pickers: dial, sheen, both bezel halves, markings, numerals, hands, lume, glow tint and the GMT hand
- Date window on or off in five positions — 12, 3, 4, 6 or 9 — with the hour marker underneath stepping aside
- Two short lines of your own dial text, with an optional five-star flourish
- Save as many faces as you like, kept on your device, or let the watch cycle the whole collection hourly, daily or weekly
Underneath
It is a proper tool as well
The watch is the point, but the app under it does the ordinary work of living across time zones. There is not one hardcoded offset in the app — every reading comes from the system’s own time-zone database at the moment being shown.
18:00 in London, not 06:00 here
You type the time you actually mean. Choose the city, spin the wheel in their wall clock, and Meridian shows you when it rings for you before you commit — with a warning if that lands somewhere unkind. The alarm is stored against the city’s clock, so a clock change cannot move it.
- A live “Rings 06:00 your time on Tue 3 Mar” line under the picker, flagged when it falls before 07:00 or after 23:00
- On iOS 26 alarms ring as real system alarms, through silent mode and Focus; on earlier versions of iOS they fall back to notifications, which silent mode and Focus can suppress
- Settings shows which engine the build is on, whether alarm permission is granted, and can ring a test alarm about 75 seconds later
- Ask Siri to set a city alarm without opening the app
One moment, read on every clock you keep
Choose a source — your own time, or any city you have added — and the wheel binds to that city’s wall clock, so you edit in the clock you are thinking in. A call set six months out shows the offset that will apply then, not today’s.
- Search by city, by code, or by zone: SFO and SF both find San Francisco, from a table of 211 airport and city codes
- “Add to Calendar” opens the system event editor prefilled with a one-hour event — you choose the calendar and tap Add, and Meridian never asks for access to your calendar
- Every city row carries the zone abbreviation actually in effect on that date
- Places beyond the app’s own two tables are named after their time zone, so a handful read as the zone’s main city rather than the name you typed
On the home screen, without opening the app
Most of the time you only want the answer. Two widgets carry it to the home screen and follow whatever you keep in Meridian — change your primary city or add a person and they follow, with nothing to re-add.
- People widget: up to four faces with status rings and their local times, plus a count of how many of those four are callable. Home screen only
- Local + Primary: your clock stacked over your primary city, with an offset chip in words on the medium size
- Lock-screen inline and circular placements for your primary city
- Widget text cannot tick a wall clock, so each timeline is pre-baked one entry per minute, aligned to the top of the minute — minute-accurate, rather than whenever the system next refreshes
- Tapping lands you on the tab you were looking at — the clock, or your people
Privacy
Nothing to collect, because nothing leaves
Meridian has no account, no server, no analytics and no third-party code. A search of the whole app finds no networking of any kind, so we never receive anything you enter. Your people, cities and alarms stay on your device and in your own device backups, and the people you add are never contacted and never see anything.
- No accounts, no sign-in, no cloud sync — and zero third-party dependencies
- Meridian never asks for your address book. The contact picker runs outside the app and hands back only the one person you tap: their name and thumbnail, nothing else
- Meridian never asks for your calendar, your location, your camera or your photos
- The only two permissions it requests are notifications and alarms
- If you save a calendar event, the system editor puts it in the account you pick, which may be a third-party account under its own policy
TestFlight beta
Try it before it reaches the App Store
Meridian is in beta now. Testing happens through Apple’s TestFlight, so builds arrive on your phone the moment they are ready — and your feedback goes straight back to the person who wrote it.
Email us the address attached to your Apple ID — that is the one TestFlight invites can reach.
Install Apple’s free TestFlight app, then open the invite link we send back.
Tap Install. New builds arrive automatically, and feedback goes straight from TestFlight to us.