GYMer is a free iPhone app developed by MPDC, designed to assist both beginner and professional bodybuilders in their fitness journey. With over 140 extreme and advanced workouts, GYMer offers unique features that cater to individual needs.

One of the standout features of GYMer is the ability to filter down muscle groups. Users can choose from a variety of options such as lower chest, middle chest, and upper chest, to find workouts that specifically target their desired muscle groups. This allows for a more personalized and effective workout routine.

In addition, GYMer provides muscle highlights in workout videos, indicating which muscle groups are involved in each exercise. This feature enhances users' understanding of the exercises and helps them better visualize the muscle anatomy.

Furthermore, GYMer includes videos that showcase common mistakes made in the gym. By highlighting these mistakes, the app promotes workout safety and helps users avoid potential injuries. Proper execution of exercises is crucial for both safety and achieving desired results.

Overall, GYMer is a comprehensive gym workout trainer app that offers a wide range of workouts, muscle group filtering, muscle highlights, and guidance on avoiding common mistakes. It is a valuable tool for individuals looking to improve their fitness and maximize their workout efficiency.