You don’t need to keep scanning in PokiiMap to find out if a pokemon that you are interested in is nearby. You can turn on the notification function to let PokiiMap run in the background. It scans your current location every 2 minutes and will send a notification to your phone when it detects a pokemon near you.
In order to get notifications, you need to select the pokemons you want to be notified about, otherwise you will get a lot of unwanted notifications.
Go to settings, change the notification settings to what you like.
After changing the notification settings, go back to the map screen and turn the notifications by clicking the notification button.