Workout Log-Track Gym Progress is a free iPhone app developed by Colton Lemmon. It falls under the Lifestyle category and specifically the Health & Fitness subcategory.

The app allows users to build customizable workout routines and easily log sets, weight, and reps for their exercises. It aims to help users push themselves each time they hit the gym. Additionally, users can store their body weight and progress photos in one place to stay motivated.

With Workout Log-Track Gym Progress, users can switch between different workout routines and days based on their needs or fitness goals. The app also offers a feature where users can reflect on their exercise history to determine how to challenge themselves today and visualize their progress over time.

It is worth noting that Workout Log now integrates with Apple HealthKit, allowing it to read user heart rate data when available. The app also mentions that more heart rate features will be added in the future.

Please note that Workout Log offers subscription options, including a 1-month subscription for $2.99 (USD), a 1-year subscription for $USD), and a 1-week free trial for new subscribers. It is important to review the privacy policy, terms, and conditions on the developer's website before subscribing.