249+ iOS apps curated and reviewed
The best 21 day body transformation apps on iPhone average 2.5★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 2.6★ (5) | Yes | Yes | May 2026 |
| 2 |  | Free | — | Yes | No | May 2026 |
| 3 |  | Free | — | Yes | Yes | May 2026 |
| 4 |  | Free | — | Yes | Yes | Jul 2026 |
| 5 |  | Free | — | No | No | Jul 2026 |
| 6 |  | Free | — | No | Yes | May 2026 |
| 7 |  | Free | 1.0★ (2) | No | Yes | Jul 2026 |
| 8 |  | Free | — | Yes | Yes | Jun 2026 |
This program offers a 3-week fitness plan with daily bodyweight workouts to help users lose fat and build strength. It's designed for home use and requires minimal daily exercises.
Visualize your fitness goals with AI-powered body transformations. Simulate weight loss or muscle gain on your photos, enhance them with professional editing tools, and share your progress to stay motivated.
Access a virtual gym with over 200 video programs for women, including pilates, fitness, meditation, and dance. Train at home at your own pace with short, effective workouts designed for optimal results. Programs cater to all fitness levels and specific needs like pregnancy and post-delivery.
This app provides fitness guidance, videos, and tutorials for all levels, from beginners to advanced athletes. It offers personalized training and nutritional programs developed by an experienced IFBB Pro Athlete.
This app simplifies tracking workouts, meals, and water intake for a 21-day program. It offers flexible scheduling, detailed progress reports, and customizable meal plans to support your fitness journey.
Track your weight loss journey with personalized goals, ideal weight calculations, and detailed body measurements. Monitor progress with charts, reminders, and a personal photo ribbon. Secure your data with password, fingerprint, or Face ID protection and sync with Apple Health.