Scenarios

Pick the package shape first, then a protocol.

• Native JSON: the app POSTs update check. Official SDKs wrap this path only.
• Store feed: when the app already ships Electron / Sparkle / Tauri (or similar), create a store listing and paste the URL into the updater. Official SDKs do not read store feeds.

Shape	Page
Single exe / dmg / AppImage	Desktop or a store page
Multi-file directory	Desktop multi-file; no per-dll binary delta
Electron	Electron (electron-updater generic)
Tauri	Tauri
Sparkle / WinSparkle	macOS / Sparkle
Squirrel / ClickOnce / WinGet / MSIX	Other desktop updaters
Android sideload / F-Droid	Mobile
Firmware	MCU
Headless services	Servers and CLI
The website itself	Web / Node

Related: Store listings.