The Knot Ultimate Wedding Planner

We like to call this one "the mother of all wedding apps" (and yes, this is shameless self-promotion, but we're proud of our app!). Access your wedding checklist, manage your guest list, track your budget and browse 1,000s of dresses and real wedding photos. The best part? The app automatically syncs up to your tools and favorite photos on TheKnot.com so it's all there when you log back on with your computer.

Tiffany & Co. Engagement Ring Finder

Whether you're not engaged yet and looking for the perfect ring or you just love looking AT engagement rings (no judgment here!) Tiffany & Co. Engagement Ring Finder is genius. “Try on” different diamonds by customizing your skin tone and ring size then watch it sparkle in motion. (Warning, you may become addicted to that 3.5 carat diamond ring.)

Bloomingdale’s Big Brown Bag

Bloomingdale’s recently released their Big Brown Bag app that allows you to create, build, and manage your Bloomie's registry all from your phone. Instead of walking around with a registry gun, just scan the bar-code directly from your phone and add it to your registry. It also gives you access to all the latest customer reviews to help you decide between those pretty punch bowls.

Wedding 911 by The Knot

Wedding911 is like having a wedding expert and wedding planning therapy group in your pocket. Peruse hundreds of Ask Carleys on your phone and find answers to obscure wedding etiquette questions while you're on the go -- from seating arrangements to guest list concerns and more. Or (even better) use the app to connect with thousands of other brides: Post a question on the app and get instant advice and ideas from brides like you!

Wedding Budget and Tracker by WeddingCaddy.com

Paying for the wedding is all about smart budgeting and saving tricks. This one customizes to your specific numbers and helps you keep a close eye on expenses. Our favorite part is the pie chart that helps you visualize your budget breakdown. Plug in a higher amount for flowers (like for those out-of-season peonies you love) and you'll see how it affects the rest of your budget.