1RM Calculator is a lifestyle app developed by Yuri Koshiishi for iPhone users. This easy-to-use app is designed to help fitness enthusiasts track and calculate their 1 Rep Max (1RM) with the option to use the Rate of Perceived Exertion (RPE) scale.

With 1RM Calculator, users can accurately estimate their rep maxes from 2 to 12 reps based on their estimated 1RM. This allows them to gauge their strength and progress over time. The app also offers the functionality to save and track their 1RM history by exercise, making it easy to monitor their performance and set goals.

One of the standout features of 1RM Calculator is its ability to customize exercise selection. Users can choose from a wide range of exercises to suit their workout routine and preferences. Additionally, the app offers a dark theme option, providing a visually appealing and customizable interface for users.

Overall, 1RM Calculator is a valuable tool for fitness enthusiasts looking to accurately calculate and track their 1RM. Its user-friendly interface, customizable exercise selection, and the option to use RPE make it a convenient and comprehensive app for anyone focused on their health and fitness goals.