Turbo Clean is a simple and very useful app for cleaning your Android phone. It allows you to remove any unwanted file, it helps you speed up your phone, and to extend battery life. 

Turbo Clean app works as follows:

1. Choose "Clean My Phone"

2. Create a new profile and install the app.

3. After installing it you will see the button "Upgrade" and then it will work.

It is enough to press the upgrade button and you will see the following screen:

"Download and install Turbo Clean.

It is compatible with Android 5.0 (Oreo) and above."

You will see a small button with the text "Upgrade".