Oh Appy Day! is our ongoing feature giving you the scoop on the coolest apps from some of the coolest people anywhere. This week, we asked Rihanna, who knows a thing or two about Instagram (she currently has 16.2 million followers @badgirlriri), to share her favorite app with us.

We love how definitive she is about it!

 

Squaready is my app. It’s the app that [lets] your rectangular pictures fit in the square box. Sometimes you want the full look. You want to give them everything, you know? ” — Rihanna

 

 

 

Rihanna uses the Squareready app to convert rectangular Instagram photos into the square

The Squareready App for working with rectangular Instagram photos: Rihanna favorite

 Squaready Pro is a $1.99 download for iOS, made especially for cropping, editing, and customizing your Instagram photos. Clearly Rihanna knows how to make it work.

You can find Rihanna, the seven-time Grammy Award winner and top-selling digital artist of all time (wow!), currently lends her voice to the main character “Tip” in the new DreamWorks Animation film, Home, which we recently reviewed, and just opened on Friday. She’s also launched five fragrances, several clothing collections, and is the spokesperson for MAC & Viva Glam. Suddenly we feel like underachievers.