Plan in a Google Sheet, then view it here on the go – offline too.
Fill in the Excel template (or get the file from whoever planned the trip) and tap Open file. It loads fast and works with no internet, but it's view only – no ticking or editing, and changes to the file don't sync. You can send the same file to your travel buddies to open the same way.
Open the invite link they sent you, or tap Add trip and enter the connector link, the trip Sheet link and the passphrase.
Small to-dos: questions to ask, reservations, reminders.