Hi apologies for the late response.
Please share more details on your customizations here along with following details .
To build your app we would need :
1. a icon image with size 2732 X 2732 . and a logo image in app with any size .
2. a splash image with size 2732 X 2732 .
3. If you want Facebook login then please provide Facebook app id ,facebook secret key ,build id ,google play package name .
refer this link to generate api key and username : https://IONICFRAMEWORK.COM/DOCS/NATIVE/FACEBOOK/
If you are find difficulties in generating the keys please provide your facebook login credentials ,we will generate them for you (there will be extra $10 charges for this) .
4. Do you want app for iOS and android both ?