Best for wayward munchers: 8fit
Sit-ups are all well and good, but if you're bingeing on burgers every night you'll soon lose those abs. 8fit solves this by serving up exercise plans alongside food advice, meal plans and tummy-friendly shopping lists. You can even filter out certain meal types - so paleo vegans have no excuse.
Throw in fat-fighting exercises - including videos - and you've got a properly healthy solution to food and fitness.
Best for secret athletes: Freeletics
Freeletics is seriously intense. You'll probably spend most of your first session wheezing, aching and moaning, before heading back inside for a long bath and a cry.
If you want front-cover abs in time for Christmas, though, Freeletics is your answer. For free, you'll get a heap of bodyweight exercises that'll have you sweatier than Paddington in the marmalade aisle, while the paid coach gets you an advanced machine-learning system that provides bespoke training, goals and advice.
Best for video stars: Fitbit Coach
As if Fitbit hadn't done enough to get you moving, it's now offering Fitbit Coach, a personal trainer in your pocket. With a workout schedule designed around you, personalised video workouts mean you'll have no problem nailing the moves - while session lengths that range from 7 to 50 minutes eliminate any excuses about being too busy.
The full version is available via monthly subscription but, at US$7.99, that's a pretty reasonable regime.
Best for simple sorts: Sworkit
If you find the usual crop of workout apps intimidating, Sworkit is a stellar place to start. With exercise plans to suit both your fitness level and your desired results, the app is designed to work around your lifestyle - whether that's a quick lunchtime stretch or a sweaty session every morning. You can even create custom routines that skip your least favourite exercises.
Upgrade to premium and you'll get full guidance and access to trainers, though there's plenty in the free version to make Sworkit accessible to everyone.
Best for shy sweaters: Daily Burn
Got 30 minutes to spare every day? Join the live, daily workout show with Daily Burn for exercise with a twist. If you can't stand the idea of hitting the gym with a class of sweatpant-clad gym bunnies, it's a solid way to emulate that group motivation feeling in your home.
There's a bank of on-demand workouts, too, if you pay for premium, though it's really the live chat and guests that make Daily Burn unique. It's not for everyone, but it's properly open fitness.