Longitude app icon, wordmark, and Month view on iPhone with the New York time zone button

The one-tap time zone calendar

1 tap.
Every event, local.

Tap the time zone button and your whole calendar switches instantly. Or open Dual Time to read the same day against two local clocks at once.

Available on iPhone · Android testers wanted
01

One tap, another time zone

Tap the time zone button or swipe vertically in Month view.

02

Two clocks, one schedule

Dual Time aligns the same day to two time scales, dates, and all-day lanes.

03

All your calendars together

Bring device, Google Calendar, and Microsoft 365 calendars into one view.

Built for iPhone

A simple calendar.
Every place, in 1 tap.

Private by design

Your calendar stays yours.

No Longitude° account, ads, tracking, or application-operated analytics.

Privacy policy

Longitude° Pro

Save every place you need.

Unlock unlimited saved time zones and custom labels with a one-time purchase.

US $9.99
Longitude app icon

On iPhone now. Android closed test open.

Try one-tap switching and Dual Time today, or help test the Android release.

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