Fitrox vs Dr. Muscle
Two AI strength apps - one a coach you can talk to across every goal, the other a deep auto-progression engine for hypertrophy and strength.
Explore the comparisonDr. Muscle is one of the most science-heavy AI apps out there: it auto-regulates your sets in real time with daily undulating periodization, RIR targets, rest-pause, and automatic deloads, aimed squarely at hypertrophy and general strength. It's powerful - and priced like it. Fitrox is adaptive too, but it's built as a conversational coach across every goal, that reads your log, explains its calls, and costs a fraction. Here's the honest breakdown.
Compare the essentials
Scroll the table to compare features. Feature names stay in view; use arrow keys when the table is focused.
| Feature | Fitrox | Dr. Muscle |
|---|---|---|
| Core model | Conversational AI coach | AI auto-progression engine |
| Conversational coach (ask "why") | Yes Reads your log | No Auto-adjusts, no chat |
| Adaptive auto-progression | Yes Recovery/HRV day-of | Yes Signature (DUP, RIR, deloads) |
| Goal breadth | All goals (strength, hypertrophy, sport, calisthenics) | Hypertrophy & general strength |
| Free tier | Yes Onboarding, library, logging | Free plan (limited) + trial |
| Languages | 9 | English |
| Pricing (monthly) | ₹499 / $4.99 | ~$49 |
| Annual | ₹3,999 | ~$399 |
| India-priced (INR) | Yes | No |
| Made by | Fitrox (India) | Dr. Muscle (North America) |
Dr. Muscle pricing & features as of 2026 (plans vary) - check the app for current details.
Pick Fitrox if…
You want an AI coach you can actually talk to - one that explains the why - across any goal, in your language, with a free tier and ₹499 pricing rather than premium-tier cost.
Pick Dr. Muscle if…
You want a deeply science-driven auto-progression engine focused on hypertrophy and strength, and the premium price isn't a barrier.
Dr. Muscle is a serious auto-progression engine. Fitrox adds the conversation, the breadth of goals, and the languages - at a price built for everyone.
A coach you can talk to.
Onboarding, the exercise library, and basic logging are free. Upgrade to Pro when you want the full coach.
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