1. ModiFace is the most popular digital makeover app that lets you try out different looks.
2. Top Coat lets you browse and book local nail artists based on their uploaded photos.
You can even use the app to pay via mobile when you're finished — which is way easier than messing up your nails by digging into your wallet! Available for iPhone here.
3. Sephora To Go keeps track of your Beauty Insider points and offers free shipping on purchases over $50.
4. Nailsnaps is a Kickstarter-funded app that will turn your Instagrams into nail art.
5. Mirror is an app that turns your front-facing camera into a mirror that's actually usable.
6. OPI is a digital try-it-on studio so you can try all the new colors (without having to sneak at the drugstore).
Get it for iPhone here.
7. Beautiful Me uses your Facebook photos to give you personalized information about your skin.
It can tell you a lot using photos over time, like how your skin is aging, what kind and color of foundation you need, and what your best colors are. And it even works on hair! Currently available for iPhone.
8. Beautylish is like a Pinterest just for beauty products and trends.
9. iDrated shows you how much water you should drink based on age and weight.
Being hydrated is a great step towards looking and feeling your best. Get it on iTunes.
10. Pretty in My Pocket lets you scan barcodes and get real reviews for products before you buy them.
11. Good Guide tells you the health, environmental, and social impacts of products when you scan their barcode.
12. UV Safe Timer tells you how much sunscreen you need and what kind to use.
This app uses your location to tell you the local forecast, the UV index, and the recommended sunscreen for that day based on your skin type, and it even alerts you when you need to reapply! Download it on iTunes.
13. YouTube is still the best place to find all the beauty tutorials you'll ever need.
14. Hair Cast gives you hairstyle advice based on the weather in your area.
Check it out on iTunes.
15. For photo beauty tutorials, nothing beats the Pinterest app.
16. Beautified lets you book last-minute salon services.
Currently listing services in New York, Los Angeles, Miami, Washington D.C., and San Francisco. Currently available on iTunes.
17. L'Oreal Makeup Genius is everything you want from a beauty app.
This app uses super-advanced facial mapping technology to show you how various products look on your face in real time — you can even move your face around! And if you scan any L'Oreal brand product it will try that one out on you.
The only downside is that you can only test L'Oreal products, but we have a hack for that: If you see a color or product you like but want a more high-end version, do a reverse dupe search! Download Makeup Genius for iPhone here.