Source: Apple Inc. Canonical content at https://developer.apple.com/design/human-interface-guidelines/imessage-apps-and-stickers. This file is a structured index of that content, snapshot 2025-02-02. Apple HIG text and imagery are © Apple Inc.; this repository provides organization and cross-referencing for AI agent consumption only.
iMessage apps and stickers
Best practices
Prefer providing one primary experience in your iMessage app.
Consider surfacing content from your iOS or iPadOS app.
Present essential features in the compact view.
In general, let people edit text only in the expanded view.
Create stickers that are expressive, inclusive, and versatile.
For each sticker, provide a localized alternative description.
Specifications
Icon sizes
Sticker sizes
Platform considerations
Resources
Related
Developer documentation
Videos
Change log
For the complete guidance, including worked examples and illustrations, see the canonical page: https://developer.apple.com/design/human-interface-guidelines/imessage-apps-and-stickers