Since we can't control the other person behavior, in rare cases it may happen that he/she will not install the app. We send the notification for 5 days.
In case the app is not installed you have the following options:
1. Replace the phone number you want to Spy
2. Replace the app notification for the same number and try again
You can replace the phone number or app notification up to 3 times until the order is considered as Failed.