Most fitness apps are built for weight loss. OnlyGains is an operating system for high-performance athletes managing the complex ecosystem of training, nutrition, and recovery required for intense events like HYROX and Ironman.
Hi Product Hunt! 👋
I'm Chaitanya, the solo founder building OnlyGains.ai.
Balancing intensive software engineering with training for a HYROX race just 100 days away made me realize a massive gap in fitness tech.
If you're a hybrid athlete, your plate is already full. You are managing intense fitness loads, precise nutrition, and critical recovery protocols simultaneously.
Current 'generalist' solutions focus mostly on basic tracking or weight loss. They completely fail to address the complex needs of someone training for a sub-90 min HYROX or an Ironman.
I've spent the last 5+ years in the hybrid athlete space, transforming from a 52kg guy to a 75kg functional athlete who eats marathons and muscle ups for breakfast.
I needed a 24/7 coach to manage my training ecosystem so I could focus purely on execution. Since I couldn't find one, I built it.
We launched our V1 in October 2025 and have grown to 300+ users purely through organic community adoption.
Today, we are launching V3, featuring our fully integrated AI and a seamless mobile experience.
I would love the PH community’s feedback on our onboarding flow and how the AI adapts to your current fitness data.
I'll be hanging out in the comments all day to answer your questions!
find me on socials:
https://instagram.com/fitxaihttps://www.linkedin.com/in/chai...https://x.com/hiCallMeChai
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Love the focus on hybrid athletes here. Most fitness apps still treat strength and endurance separately, so this approach is really refreshing. Upvoted and excited to see where this goes. One question here - Is this only for elite athletes or can someone just starting their running journey use it?
@shubhi_agarwal2 Thank you so much Shubhi, to answer your question: While we designed this to solve the intense cognitive load for athletes training for elite events like HYROX, the system scales perfectly for anyone who is serious about optimizing their performance. If you are tired of generic 'stay active' advice and want a precise roadmap for your specific goals, the AI will meet you exactly where your fitness level is at today.
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The fitness app market is so saturated. How does OnlyGains differentiate from standard tracking apps like MyFitnessPal or Strava?
@gts_47 Great question. Most companies build for weight loss or isolated tracking; we build for performance. Existing tools look at data in isolation—just your diet or just your miles. OnlyGains acts as a complete operating system for the athlete's body, connecting the dots between your training load, your nutrition needs, and your recovery protocols in one cohesive loop. We do the calculating so you can do the executing.
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Munder Difflin
Love the focus on hybrid athletes here. Most fitness apps still treat strength and endurance separately, so this approach is really refreshing. Upvoted and excited to see where this goes. One question here - Is this only for elite athletes or can someone just starting their running journey use it?
Munder Difflin
@shubhi_agarwal2 Thank you so much Shubhi, to answer your question:
While we designed this to solve the intense cognitive load for athletes training for elite events like HYROX, the system scales perfectly for anyone who is serious about optimizing their performance. If you are tired of generic 'stay active' advice and want a precise roadmap for your specific goals, the AI will meet you exactly where your fitness level is at today.
The fitness app market is so saturated. How does OnlyGains differentiate from standard tracking apps like MyFitnessPal or Strava?
Munder Difflin
@gts_47 Great question. Most companies build for weight loss or isolated tracking; we build for performance. Existing tools look at data in isolation—just your diet or just your miles. OnlyGains acts as a complete operating system for the athlete's body, connecting the dots between your training load, your nutrition needs, and your recovery protocols in one cohesive loop. We do the calculating so you can do the executing.