If you have been provided an account on the Bluedot app, you do not need a separate charging app as all public chargers accessible to you are identified in the Bluedot app.
If you are using the Inspiration Mastercard payment card, you can download the following apps on your phone to find the closest public chargers as well as to use the various charging networks.
PlugShare (covers a range of different networks): https://www.plugshare.com/
Electrify America (For Electrify America charging stations): https://www.electrifyamerica.com/mobile-app/
EVGo (for EVGo charging stations): https://www.evgo.com/download-app/
Chargepoint (for Chargepoint charging stations): https://www.chargepoint.com/drivers/mobile