Created by Riley Testut, AltStore is the modern replacement for Cydia Impactor. It solves the code 200 error by using a desktop companion (AltServer) that leverages iTunes WiFi sync protocols and a personal developer certificate that renews itself automatically every 7 days.
: Because Impactor must communicate with Apple's signing servers to validate certificates, any maintenance on Apple's end will cause the tool to fail. Two-Factor Authentication (2FA) assert code 200 cydia impactor
signifies "OK"—a successful connection and response from a server. When Impactor triggers this assertion failure, it essentially means the tool expected a successful "OK" response from Apple's servers but received something else (like a 403 Forbidden or 500 Internal Server Error). Common Causes Created by Riley Testut, AltStore is the modern
Using a free Apple ID instead of a paid developer account (as of late 2019, Impactor largely requires a paid account to function). : This is the most frequent cause
: This is the most frequent cause. If Apple's Apple ID or developer services are experiencing issues, Cydia Impactor cannot verify your credentials or generate a certificate. : Check Apple's System Status page or community forums like