Used three users

1)- client

2)- control room

3)- vehicle

The client will assign a task to the control room and the control room will then assign a task to the vehicle to see on the map with real-time listening from firebase and local notification will be generated in the app when firebase inserts/ update/ delete any data.
Different Packages used in this app:-
cloud_firestore: ^4.3.1
firebase_core: ^2.4.1
get: ^4.6.5
google_maps_flutter: ^2.2.3
location: ^4.4.0
flutter_animarker: ^3.2.0
awesome_notifications: ^0.7.4+1
flutter_animated_dialog: ^2.0.1
intl: ^0.17.0
date_format: ^2.0.7
rounded_loading_button: ^2.1.0
flutter_launcher_icons: ^0.11.0
maps_launcher: ^2.0.1
number_to_words_english: ^2.0.2
syncfusion_flutter_signaturepad: ^20.4.44


Note:-

If you want to use a map then you have to use your own google map API key.