Following details you need to have in-hand before releasing app to Apple App Store.

• Name of the App
• Privacy Policy URL
• Promotional Text
• Keywords (This will make you app more available when customers search on app store)
• Description
• Support URL
• Keywords
• Marketing URL
• Copyright
• App Store Icon(1024 px X 1024 px)
• App Screenshots (Minimum 3),Sizes are mentioned below. (Please ask this with your UI Designer)

For Review Process

Test Account Credentials (This is for Apple to run through the app)

1. Email
2. Password

Contact Information

The person in your organisation who should be contacted if the App Review team has any questions or needs additional information.

1. First Name
   1. Last Name
   2. Email
   3. Phone Number

App Screenshots Sizes

iPhone screenshot sizes:

• iPhone 3 (3.5 Inch): 920 x 640 px
• iPhone 4 + 5 (4 Inch): 1136 x 640 px
• iPhone 6 + 7 +8 (4.7 Inch): 1334 x 750 px
• iPhone 6 Plus + 7 Plus + 8 Plus (5.5 Inch): 1242 x 2208 px
• iPhone X (5.8 Inch): 1125 x 2436 – This isn’t required; Mind that the difference is that the screenshot in iPhone X will be shown with rounded corners

iPad screenshot sizes:

• iPad (12.9 Inch): 2048 x 1536 px
• iPad Air and Mini Retina (10.5 Inch): 1536 x 2048 px
• iPad Pro (12.9 Inch): 2048 x 2732 px

Please comment below if I have missed anything.

Thanks for reading !!!