AI fitness, built without the fluff
We build practical, evidence-based tools to help people train smarter and eat better — powered by AI, but anchored in established sports science.
Our mission
Most fitness apps either oversimplify (one-size-fits-all plans that ignore your level) or overcomplicate (charts and metrics no one acts on). FitArox sits in between: enough personalization to be useful, simple enough to actually follow every day.
We believe AI is finally good enough to do for fitness what a personal coach does — adapt to your body, your equipment, your schedule — at a fraction of the cost. Our goal is to make that level of personalization the default, not a luxury.
How FitArox started
FitArox was built by an independent team of engineers and fitness practitioners frustrated with the state of fitness apps in 2025. Generic plans, paywalled basics, and AI features bolted on as marketing — we wanted something different.
We started with the calculators, because they are the foundation: TDEE, macros, body fat, 1RM. Forty-plus tools, all using peer-reviewed equations (Mifflin-St Jeor, Brzycki, Epley, Navy method, Katch-McArdle), all free. From there we built the AI app: personalized programs, photo-based meal scanning, body composition analysis, a 24/7 coach.
We launched on Android and iOS in early 2026. Everything we ship is owned by us — no investors, no growth-hack pressure, just product.
How we work
Every recommendation in FitArox traces back to published sports science. Here's the framework we use.
Peer-reviewed formulas only
Our calculators use established equations: Mifflin-St Jeor for metabolic rate, Katch-McArdle for lean-mass-adjusted needs, Navy method for body fat, Brzycki and Epley for one-rep max, ACSM guidelines for cardio zones. We do not invent formulas.
AI to personalize, not to diagnose
AI generates training programs and meal plans by combining your inputs (goals, level, equipment) with proven training principles (progressive overload, periodization, macro distribution). It does not give medical advice or replace a doctor.
Ranges, not single answers
Where the science gives ranges (protein 1.6 to 2.2 g/kg, calorie deficit 10 to 25 percent, sleep 7 to 9 hours), we show ranges. We tell you the trade-offs so you can make informed choices, not blindly follow numbers.
Conservative defaults
When in doubt, we err on the side of safety. Body recomposition rates, lean bulk surpluses, calorie deficits, alcohol guidance — defaults are calibrated for sustainable progress, not aggressive cuts that backfire.
What we don't do
Health and fitness is a YMYL (Your Money or Your Life) category. Trust matters. Here's what FitArox will never do.
- We do not sell your data. The leads we collect (via free ebooks for example) stay private and are used only for FitArox communications. No third-party sharing.
- We do not promote supplements, brands, or protocols we don't use ourselves. No affiliate links inside the calculators or the app.
- We do not make medical claims. FitArox is a fitness tool, not a diagnostic platform. If a calculator flags something unusual, we tell you to see a healthcare professional.
- We do not do dark patterns. No fake countdown timers, no hidden subscriptions, no "100,000 users joined today" inflated numbers. The honest metrics are on the homepage.
Who's behind FitArox
FitArox is led by Samir Errikh, a software engineer and lifelong fitness enthusiast who built the platform from the ground up. Samir has been training consistently for 17 years across strength, hypertrophy, and endurance disciplines — a practitioner first, an engineer second. That dual perspective shapes every product decision: if a feature does not survive contact with real-world training, it does not ship. The fitness methodology was reviewed against published guidelines from ACSM, ISSN, NSCA, and recent peer-reviewed literature on AI in healthcare. We work with independent fitness practitioners on an ad-hoc basis to validate new features before shipping them.
Samir Errikh
Founder & Engineering Lead
Try FitArox today
Free forever to start. No credit card required. AI workouts, meal scanning and body analysis in one app.
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