Medication reminders when you change time zone

Fly east and your 08:00 dose is suddenly at 14:00 local. Whether that matters depends entirely on the medicine, so the app asks you rather than guessing.

The two modes

• Follow local time — 08:00 stays 08:00 wherever the phone is. Right for most medicines: a vitamin, a blood-pressure tablet, anything taken with breakfast.
• Keep exact interval — the doses stay exactly as far apart as they are at home, so the clock time moves when you travel. For the contraceptive pill, insulin and anything else on a strict interval.

Set it for a medicine

1. Open the medicine and find the time section.
2. Choose Follow local time or Keep exact interval.
3. For Keep exact interval, the app remembers the time zone you set it in — that is the home zone the interval is measured from.
4. Save. Reminders are rebuilt at once, and again automatically when the phone changes time zone.

Daylight saving

When the clocks go forward, an hour does not exist — a dose set inside it moves to the next valid minute rather than being lost. When they go back, an hour happens twice, and the dose rings once, not twice.

Before a long flight

Open the app once after you land. Reminders already queued fire correctly on their own, but opening the app lets it plan the days ahead in the new zone.