See here for a detailed overview of how often Coinlytics widgets update, see here
On iOS and iPadOS, widgets update at certain points in time determined by the underlying operating system.
If you glance at a widget twice within a couple of minutes you
may not see the price change - simply tap on the widget and
the app will come to the foreground and update the price -
both in the app and on the widget itself when you return to
your home screen. This delay is actually by design - iOS
widgets intelligently grab data in the background so as not to
drain the device battery.
If you need to be constantly checking prices on a sub-minute
level there are other more powerful trading-specific apps that
can give you that true real time data and Coinlytics may not
be the best solution for you.
For people who want to check the price of their crypto as they unlock their phone throughout the day and see their homescreen, Coinlytics is the perfect way to do that with nearly unlimited ways to customize how you see that data.