How to show notify after restart phone

i want auto run my app after i restart phone. i using local notification for notify.
constructor (public navCtrl: NavController, private alertCtrl: AlertController
,private autostart: Autostart){
showNotify();
this.autostart.enable();
}

showNotify(){
let notify = {
title: “yayaya !!!”,
text: “tich tich tich”,
at: new Date(new Date().getTime() + 1000*30)
};
LocalNotifications.schedule(notify);
BackgroundMode.enable();
}

but after i restart phone it not show notify. i wrong where ? What should I do? Thanks.

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Does it autostart your app?