Before using the mobile app, make sure you've created a TrueProfit account to sign in the app. Read through this article to see how to create your account.
Once you've had your TrueProfit account all set, there are two ways to install the TrueProfit app to your smart phone:
Scan QR code in-app
The QR code on the TrueProfit website is a quick way to sign in and install the app on the mobile app. Make sure you're signed in on the web app the click button "Get mobile app" on the top bar to open the QR code.
Once you've downloaded the TrueProfit app to your smartphone, open the app then select Sign in with QR code. Next, scan the QR code again to sign in to your account on mobile.