Requirements
1Password for iPhone Requirements
1Password for iPhone is available for any iPhone or iPod touch with iPhone OS 3.1.3+ installed.
1Password Pro Requirements
1Password Pro requires iPhone or iPod touch with iPhone OS 3.1.3+ installed.
1Password for Mac Requirements
If you want to sync your iPhone/iPod touch with your Mac, you require the latest version of 1Password for Mac. 1Password is available as a free download with a 30 day trial.
The current version requires Mac OS 10.5+ (Leopard or Snow Leopard).