r/ButterKit

New screenshot size requirements in App Store Connect this week. I've received a few messages asking about these and figured it would be helpful to share what I've learned so far!

Tl;dr

• The new iOS required size is iPhone 6.3" with Dynamic Island (medium display)
• iPhone Duo screenshots are technically optional until April 2027, according to ASC

ButterKit 3.0+ now defaults to the required iOS ASC sizes and will ask you if you want to automatically upgrade to the new size when you open a legacy project.

Source: App Store Connect announcement

Thanks to all who have helped with testing in the last few days on Reddit, Discord and via email. You may have noticed App Store Connect added new sizes for iOS apps this week, and ButterKit 3 now supports them! Rolling out now, just hit "Check for updates" from the app.

Download latest ButterKit for macOS

Some 3.0 highlights:

• New App Store Connect iOS size support: new iOS projects default to the updated size, and opening older iOS screenshot files will ask if you want to migrate to the new size auto-magically. Legacy versions remain available.
• New App Store artwork: Create and export Header, Search Results, shared artwork for both placements, and iPhone Duo screenshots. Templates coming soon. Thanks u/Lemon8or88
• Improved user experience: faster and more organized, with a dedicated spot for app metadata and helpful sync tools (e.g. you can now fetch individual sections from App Store Connect). You can now freely edit 3D devices right from the canvas instead of relying on the Inspector.
• Improved keyboard navigation: easily move between artboards and selected localizations with your keyboard arrowkeys (thanks u/habitoti )
• Fixes an issue where opening a project with linked screenshots could create unnecessary changes in version control (new UUIDs), even when the images were unchanged. ButterKit now checks whether linked screenshots have changed before replacing them, preserving existing image IDs and avoiding unnecessary version control changes when opening a project. (thanks markb!)
• Fixes a bug where opening the app on some screen resolutions could crash (thanks u/boulderdash-
• Added more MCP tooling, UI tweaks, and some more butter
• More improvements rolling out shortly. If you notice any issues please DM me!

- Zach

Butterkit 3.0 just gave me this warning, and I am not sure where this requirement exactly comes from? Just uploaded my sizes as always and had no issues. When will this become a mandatory requirement? I am not seeing any heads-up in AppStore Connect so far.