Personal training apps provide exercises for users to follow. Some are more specialized, offering workouts to lose weight or build muscle, depending on your goals. Certain personal training apps may only offer exercises for cardio, strength training, HIIT, or cycling, while others offer a variety or combination of exercise types.On the other hand, fitness apps cover a much broader realm. These apps can help you reach your fitness goals in a number of ways, whether through nutrition or exercise. Depending on the app, fitness apps may offer meal tracking capabilities, recipe ideas, workout options, one-on-one coaching, and more.