Needed info for your app product page

The detail of all metadatas required by Apple to fill in your app product page on the App Store..

Metadatas and text content

Field	Additional info	Mandatory
App name	30 chars max	Yes
Subtitle	30 chars max Displayed under the name of your app in the App Store search	No
Promotional text	170 chars max Short sentence describing your app to catch your users attention Displayed below the screenshots of your app in its product page, above the description	No
Description	4000 chars max Your app description	Yes
Keywords	100 chars max The keywords that a user can type in the searchbar of the App Store to find your app The keywords must be separated by commas Avoid using generic terms such as "school" or "university"	Yes
Support URL	URL giving support info about your app You could for example use your school / university website URL	Yes
Testing account	A testing account that will be used by the Apple team to test your app during the review process	Yes

Graphical elements

Item	Additional info	Mandatory
App logo	1024x1024 px	Yes
5.5" iPhone screenshots	Device example : iPhone 8 Plus 10 images max 1242x2208 px	No
6.5" iPhone screenshots	Device example : iPhone Xs Max 10 images max 1242x2688 px	No
12.9" iPad screenshots (2nd gen, with home button)	10 images max 2048x2732 px in portrait or 2732x2048 px in landscape	No
12.9" iPad screenshots (no home button)	10 images max 2048x2732 px in portrait or 2732x2048 px in landscape	No

More info about the graphical elements required by Apple to publish an app: Apple official documentation (Uploading App Previews and Screenshots section)