@Lynnj238 Only unofficial Data Witness to check your data usage. You can create a short cut to your self-service account web page on your mobile for a faster access.
Do you mean there’s an app for data usage?
It's not released, nor is it endorsed by Public Mobile. That app isn't for me. I have no issue with manually resetting the date in the my phone's internal data counter to account to have it start counting on the correct day and the fact that Public Mobile's current plans are 30 days.