Turning a Treadmill into a Side Hustle: What a HarmonyOS Startup Taught Me

The Problem: Fitness Equipment That Gathers Dust

Every side hustler knows the fear: you build something, launch it, and then watch it sit unused. For home fitness equipment, that fear is real. A treadmill gets bought, used for two weeks, then becomes a clothes rack. The founders of 临境漫游 (Lingjing Manyou) saw this problem up close. They realized most people aren't lazy—they're just bored. Running in place is dull. The mental hurdle of starting a workout is often higher than the physical one.

So they asked a simple question: what if exercise felt like play? What if the device didn't demand motivation but invited curiosity? That shift—from obligation to invitation—is a lesson for any side hustle. Don't sell a tool. Sell an experience that people want to return to.

Product as Experience: Walking as Input

临境漫游's product is a walking machine that connects to Huawei's smart screens. It's not a treadmill. It's a device that tracks your steps and lets you explore 4K scenic trails or play a 3D game called "Myth Adventure." You move left and right to dodge obstacles, pick up items, and interact with characters using hand gestures. The key insight? Your feet become the controller. The screen follows your pace, and the environment sounds immerse you.

This is a classic side hustle lesson: don't just improve the function—reinvent the interaction. The founders didn't make a better treadmill. They made a different category. By focusing on the naturalness of walking, they turned a chore into a game. For your side hustle, think about the user's friction points. What makes them hesitate? What would make them say "I want to do that again"?

Finding Your Niche: From Fitness Tool to Family Entertainment

Initially, the team targeted fitness newbies and office workers who lacked motivation. But during testing at HDC 2026, they observed something surprising. Kids lined up to play the games repeatedly. Older users asked about cushioning and safety. The product wasn't just for one demographic—it was a family activity. So they pivoted their positioning from a fitness tool to a family light-exercise platform.

This is a common side hustle evolution. You start with one audience, but real feedback reveals a broader need. The founders listened. They didn't force the product into a narrow box. They adapted. If you're building a side hustle, pay attention to who actually uses your product and why. Sometimes the best market is the one you didn't plan for.

Choosing Your Platform: Why HarmonyOS?

When it came to distribution, 临境漫游 made a bold bet: they went all-in on Huawei's HarmonyOS, specifically the smart screen ecosystem. Why? Because they didn't want just another app on a fragmented TV market. They wanted deep integration with devices, system capabilities, and family scenarios. HarmonyOS offered distributed capabilities, low-latency connectivity, and a growing ecosystem.

The team had tough internal debates. Focusing on HarmonyOS meant ignoring other platforms for a while. But they believed the ecosystem's growth and support would pay off. And it did. They got dedicated support from Huawei, including documentation, debugging help, and system upgrade coordination. This is a lesson for side hustlers: platform choice matters. Don't spread yourself thin. Pick a platform that aligns with your product's needs and where you can get support.

Technical Challenges: Making It Feel Natural

The hardest part wasn't the hardware—it was making the experience feel seamless. Early versions of HarmonyOS's skeleton recognition SDK were 2D, which made pose detection less accurate. The team had to work with system teams to improve. They also faced performance issues: some smart screens couldn't run complex 3D models. They had to compress assets without sacrificing quality.

Latency was another hurdle. The walking machine sends data to the app, which then updates the screen. Bluetooth caused noticeable delays. Switching to Huawei's NearLink drastically reduced lag, making the experience feel instant. These technical tweaks are invisible to users but crucial for satisfaction. For your side hustle, don't underestimate the backend work. Smoothness isn't a nice-to-have; it's the difference between a product people use and one they abandon.

User Feedback: The Compass for Next Steps

At HDC, visitors asked two main questions. First: "How is this different from a treadmill?" Second: "Can I play online with friends?" The second question revealed a desire for social connection. People want to exercise together, even at home. So the team is planning multiplayer features, companion modes, and better onboarding.

They're also integrating with Huawei Health to personalize recommendations based on user data. Eventually, they envision a system that suggests a gentle forest walk for grandma or a more intense game for a teenager. This is a smart roadmap: listen to users, then build features that address their expressed needs. For your side hustle, create a feedback loop. Ask users what they want, then deliver. It's the simplest way to grow.

Takeaways for Your Side Hustle

• Solve a real pain point: Don't just build something; solve a problem that people actually have. The dust-collecting treadmill is a symptom of a deeper issue: lack of engagement.
• Focus on the experience, not just the feature: Make your product enjoyable to use. If it's a chore, people won't stick with it.
• Be willing to pivot: Your initial target market might not be your best one. Listen to feedback and adjust.
• Choose your platform wisely: Don't try to be everywhere. Find a platform that supports your product's needs and where you can build a strong presence.
• Technical excellence is invisible but critical: Invest in performance, latency, and reliability. Users may not notice it, but they'll feel it.
• Engage with your users: Use events, surveys, and direct feedback to guide your roadmap. Your users are your best advisors.

The Bigger Picture: Turning a Side Hustle into a Movement

临境漫游's story is still unfolding. They've launched on Huawei smart screens, but they're not done. They're building a community, integrating with health platforms, and exploring new ways to make family fitness fun. Their journey shows that a side hustle isn't just about making money—it's about creating value. By turning a boring treadmill into an engaging family activity, they've found a niche that could grow into a movement.

For anyone starting a side hustle, the takeaway is clear: don't just sell a product. Create an experience that people love. Listen to your users, adapt your strategy, and choose your partners wisely. With the right approach, even a humble walking machine can become the centerpiece of a thriving business.