Snapsie is a free iPhone app developed by Nibble Apps Ltd in the Lifestyle category, specifically targeted at Health & Fitness. It allows users to take before and after pictures to track their progress in achieving their fitness goals.

To use Snapsie, simply tap the camera icon to take your first picture. You also have the option to enter your weight in pounds, kg, or stone. Additionally, you can overlay the last picture you took to line up the two shots perfectly. This feature is especially useful for comparing progress over time.

One of the standout features of Snapsie is the ability to create customizable side by side comparisons of two pictures and share them on social media. Alternatively, you can create a movie showing your transformation over time. The app also allows you to set reminders, import pictures you've previously taken, and sync weight data with the Apple Health app.

Snapsie not only helps you track your progress visually but also provides accountability on your training goal. The app includes links to the FitMenCook app for healthy recipes and a free training plan from David Kingsbury, a Hollywood celebrity personal trainer.

Please note that Snapsie is a collaboration between Nibble Apps, FitMenCook, and David Kingsbury.