The 30 Best Fitness Apps to Help Get Your Butt In Gear

Getting a toned booty isn't easy, but this app will help get you there. 30 Day Squat Challenges is exactly what it sounds like: a one-month challenge that motivates you to do a certain fitness challenge each day. At the end of the challenge, you'll definitely feel a difference — and you'll probably be more than ready to start another month. (Free; iPhone and Android)

Getting paid to get your steps in sounds too good to be true, but that's exactly what this app is all about. By walking outside, you can convert your steps into currency — AKA Sweatcoins. And the more Sweatcoins you have, the more you can buy in real life, from yoga classes to Apple watches. (Free; iPhone and Android)

There's something motivating about seeing a laid-out map of your run. Map My Run tracks your runs through its built-in GPS, logging everything from your duration and distance to pace and calories burned. That way ,the next time you hit the pavement, you can try to beat your last workout and better your running. (Free; iPhone and Android)

Everyone can find time to work out with this app — even if you only have 7 minutes to spare. With no equipment required, the app has a ton of different workouts that aren't just quick, they're effective. Plus, if you're not sure about your technique on certain moves, it will teach you the right way to perform them. (Free; iPhone and Android)

Whether you just want the basic app — which counts your steps whenever you have your phone handy, and sets weekly goals to keep you on track — or you get more advanced with their activity trackers, like the Fitbit Charge HR (you don't even have to manually log your workouts anymore), you can't go wrong with Fitbit. The new wearable even has heart rate technology built in, so you know just how hard you busted a move in that weekly Zumba class. (Free for the app, prices vary for trackers; iPhone and Android)

It's crazy easy to give in to tiny temptations throughout the day (like that big latte you downed when temps dropped) without realizing how it affects your weight. MyFitnessPal gives you a better grip on what you're eating thanks to its recipe calculator and catalog of food and drinks, and how many of those calories you burn off through daily activity. Consider it your techy gut check on whether or not giving into another scoop of ice cream is really what you want. (Free; iPhone and Android)

If you're afraid your friends will get lost in the cheering crowd of your first 5K, don't fret. They can show support by sending personalized messages through your ear buds. All you have to do is choose the event you're running, share it with friends (the first is free, additional ones cost $1.99), then hit "start event" and their words of encouragement will be sent as you pound the pavement. Get ready for a serious surge of motivation when you're starting to feel tired. (Free; iPhone and Android)

With over 4 million Instagram followers alone, Kayla Itsines has created what might be the largest fitness community around her Bikini Body Guides. And now you can get each 28-minute workout on your phone, where you'll also find weekly coaching recs, daily menus and shopping lists (with recipes you can tailor to your tastes), and global fitness challenges so you can compete with everyone else getting nice and schweaty. (Free for app, $19.99/month; iPhone and Android)

Fun fact: When you have tunes synced to the workout pace you want to set, research shows your endurance (or how long you'll be able to keep up that pace) boosts up to 15 percent longer. So obviously you should have an app that helps with that. Spring has DJs curate playlist with songs that fall in the optimal beats per minute (BPM) range for your goals, so all you have to do is run (or bike) to the beat of the music. (Free 5-hour trial, then $4.99/month or $39.99/year; iPhone)

If you're not the commitment kind of girl (at least, to your gym), ClassPass gives the variety you crave. Bounce between participating studios in your city, sweating through a class at each location up to three times a month (bonus: most studios allow you to book up to a week in advance). So if you really love barre at one place, but can't give up the boot camp class at another, well, now you don't have to. (Free for app, membership costs vary by city; iPhone and Android)

If you need an incentive to reach those weight loss goals, it's time to put your money where your mouth is. Pact lets you wager a bet each week on how many times you'll reach a certain goal (like working out 4x/week, or eating veggies 6x/week), and then the app verifies whether or not you actually, you know, do it. If you don't, pay up. The pot is communal, so whoever reaches their weekly goals gets the cash the others had to hand over. (Free; iPhone and Android)

Whether you want healthy recipe hacks or Pilates-based routines—all with fun names like "what makes you bootyful butt challenge" — put one of the Top 25 Health & Fitness Influencers in the World in your pocket. You'll get a secret monthly video, can purchase a monthly calendar of workouts, and can tap into a community of POPsters for fit-spiration when fitting in a workout feels like #strugglecity. (Free, $0.99 for monthly workout calendar and access to secret video; iPhone and Android)

Picture this: You walk into the gym, psyched to cycle your heart out, only to realize the class is canceled or full. Now you can take a class wherever there's a bike nearby, as CycleCast spins out 20-, 45-, or 60-minute interval workouts created by top instructors from across the country. Bonus: It'll track your performance in each session, note your heart rate, and tally your calorie burn. Basically, consider all your excuses busted. ($10/month; iPhone)

Ever get to the gym and have no freaking idea what you want to do? PulseTread solves that problem—when you sign up for a monthly subscription, you'll get a brand new 30-minute routine sent directly to your phone each day (Monday through Friday), which includes coaching from celebrity trainer Mark Harari (he's worked with the likes of Katie Holmes). It's like having a personal trainer in your pocket — and ear. ($4.99/month or $0.99 per workout; iPhone)

Taking up running is nice, but if the weather is cold, it's that much harder to get out the door. So hit the treadmill and fire up RunSocial, which takes you through virtual runs in cool places like the Swiss Alps or Tuscany (you can see it on your phone and tablet, or even sync to a TV screen), to help get your mind off the fact that you're, well, running in place. You'll even see other runners along the course — and yes, they can pass you — to fuel your competitive fire. (Free; iPhone and Android)

Only got five minutes? That's all you need to squeeze in a quality sweat, as you cancreate custom workouts (perfect for those dealing with injuries) from over 200 different exercises — all of which have video to show you how it's done — or choose one of their interval training routines to follow. Get the kids involved with Sworkit Kids, and every routine you do will be customized to their level (kids teach their routines, too — total inspiration). (Free; iPhone and Android)

Alright, alright, this app is about more than getting in shape. If you're single — and like working out — then swipe right over here and meet other fitness-loving people. Whether you like biking, yoga, or are totally digging CrossFit, you can scroll through the matches Sweatt gives you, see what they're into, and ping 'em if you're interested in setting up a first date. Because hey, isn't it nice to test the waters with someone you actually have something in common with? (Free; iPhone)

Whether you're a beginner or get bendy on the reg, this app lets you practice poses wherever, whenever. Choose to flow through one of their 65 ready-made classes (each lasts 15, 30 or 60 minutes), or craft your own with over 280 poses demonstrated through HD video (the app puts them together for you). Either way, you'll get teacher commentary and can focus on your main goal, whether that's strength, flexibility, relaxation, balance — or a combination of all four. ($4.99; iPhone and Android)

Let's face it: A woman can only bake so many brownies for school bake sales. Thankfully, now you can run your heart out for an equally good cause. Charity Miles donates 10 cents per mile for bikers and 25 cents per mile for runners to the charity of your choice. Once you choose an organization, the app automatically tracks the distance you cover, and does all the work for you. (Free; iPhone and Android)

Picture this: You wake up and want a green juice on the way to your workout. Then you want a massage to help those hard-worked muscles recover. Enter MINDBODY, where you can not only book a spot in class and schedule your spa service, but it adds everything to your calendar (because double-booking is the worst) and lets you find reviews and deals for businesses in the surrounding area. Makes fitness sound a whole lot easier to manage, don't you think? (Free; iPhone and Android)