Portl UltraGym by Rainvi Technologies Private Limited
A companion app for UltraGym





8+ similar apps compared and reviewed
Whether you want more options like Fit In 100 Days or a completely different take on the same concept, our curated list of 8+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.





















This app guides you in building lasting habits through consistent daily actions over 100 days. It features a simple interface for tracking progress and smart reminders to keep you on track. Reach your goals with a celebratory screen upon completion.


This app offers a hardcore 100-day workout challenge designed for serious transformation. It features daily HIIT exercises targeting various muscle groups, with no equipment needed. Users can track progress, connect with others, and share results.


This app allows R6 CrossFit members to easily reserve spots in classes and sign up for gym events. It also provides account management features, such as updating personal information and payment details.


This app offers a comprehensive approach to fitness, aiming to build overall body strength for daily life. It provides a welcoming environment for individuals and families to embark on a health journey, rejuvenating body, mind, and spirit.