If I buy a magazine in iTunes will it down load to both my iPhone and iPad or mac

Hey Cnsjj,

Just make sure Automatic Downloads are set up for that publication;

Newsstand updates subscriptions only when using a Wi-Fi connection. If you aren't seeing the latest issue:

1. Verify that you are connected to a Wi-Fi network.
2. Check Settings > iTunes & App Store to verify that Automatic Downloads is enabled for that publication.

via: iOS: Using Newsstand

http://support.apple.com/kb/HT4943

Welcome to Apple Support Communities!

All the best,

Delgadoh