No, it is not necessary to have it installed and connected to your smartphone, but it is recommended.
To use the vacuum cleaner, plug it in and leave it plugged in until it is completely charged (all blue lights on).
Press the Roidmi F8 Storm’s start button to begin vacuuming.
To adjust the power, press the start button again or press the speed selection button.
To switch off the Roidmi F8 Storm vacuum cleaner, hold down the start button.