As I sat down to submit my corgi-themed sticker pack last night, I realized I actually had no clue what to do. Apple’s instructions for submitting standalone sticker packs are actually spread across two separate guides (iMessage App Submissions | Sticker Submissions) which added to my confusion.

So, in case you’re as confused as I was, here’s some answers to questions you may have.

What size screenshots do I need to prepare?

You need to prepare two sizes: iPhone 6s Plus (or any of the 5.5″ devices) and 12.9″ iPad Pro.

Where do I upload the screenshots?

You need to add them in two places: at the top of the iTunes Connect record under “App Preview and Screenshots” and farther down under “iMessage App.”

Do I need to add a 1024×1024 square app icon even though Apple doesn’t list it in its Human Interface Guidelines or icon template?

Apparently. There’s a paragraph at the bottom of the iMessage App Submission guide that makes me think it might be possible to view sticker apps on the iOS App Store if you’re not running iOS 10:

if users are on an operating system lower than iOS 10, the link will open the product page on the App Store for iPhone and iPad, and users can download your app from there.

Of course, that might just apply to full iOS apps that include sticker extensions. Who knows? If you’re using the Photoshop template provided by Apple, double click on the “icon” layer under the 58×58 size. It will open as a 1536×1536  square version…you can size that down to 1024×1024 and hit “Save As” (so you won’t mess with the template) to easily fulfill this requirement.

What should I include in the screenshots?

I was a little unsure about this, but decided to go with one shot of my sticker pack in expanded view, and one shot of a sample conversation using my stickers. I took all of my screenshots in the Simulator because I don’t have test devices. I used Photoshop to add profile pictures for my message participants using royalty-free stock photos from Pexels.

What category should I put my sticker pack in?

Why, the Stickers category, of course! From there, you can choose a subcategory or two.

Can I use “stickers” and “iMessage” in my keywords?

Yep! There are some caveats though, as described in the iMessage App Submission guide.