Agrible's Pocket Rain Gauge app allows users to view the previous 24 hour rainfall total for the current GPS location of their smartphone -or- login and view the previous 24 hour rainfall total for each of their fields. Rolling updates occur hourly, meaning the rainfall data for the oldest hour falls off as the data for the most recent hour is added.
Check out the Pocket Rain Gauge: Quick Start Guide article for further information on how to use the app.
Pocket Rain Gauge Icon
Pocket Rain Gauge App