Ready to propose? There’s an app for that. A Tiffany & Co. app available for download Monday allows would-be fiancés – and daydreaming girlfriends – to shop for engagement rings on their iPhones.

The app lets users browse for rings according to shape, setting, metal or design. Rings with diamonds of six different sizes can be viewed true-to-size and paired with wedding bands.

Users can also determine the appropriate engagement ring size by placing an actual ring on the iPhone’s screen and aligning it with circles provided by the app’s Ring Sizer feature.

Other features let shoppers make appointments with Tiffany consultants and share their favorite rings via email, Facebook and Twitter.