A new reminder email has gone out from Apple to all registered iOS developers reminding them that, beginning February 1, all app new submissions to the App Store must support 64-bit architecture. For existing programs, updates must support 64-bit no later than June 1. The move will not prohibit apps from running in 32-bit mode, but must contain support for 64-bit operation, which may "prune" some apps that are no longer being developed.
