App Signing
ELI5 — The Vibe Check
App signing is like putting your digital signature on your app to prove it's really from you and hasn't been tampered with. Both Apple and Google require it, and losing your signing key is the developer equivalent of losing your passport.
Real Talk
The process of cryptographically signing an app binary with a developer certificate/key to verify its authenticity and integrity. iOS uses code signing certificates from Apple Developer Program, while Android uses keystore files. Google Play App Signing manages the upload and signing keys separately for added security.
When You'll Hear This
"Back up your signing keys — if you lose them, you can never update your app again." / "Use Google Play App Signing so Google manages the signing key and you only need the upload key."
Related Terms
App Store Connect
App Store Connect is Apple's portal where you submit your app and wait nervously for their review team to approve it.
Certificate
A certificate is a digital ID card for a website, signed by a trusted authority.
Code Signing
Code signing proves that your code is genuinely from you and nobody tampered with it between your computer and the user's device.