Independent projectsby Mike Chiou.

A precision-oriented Android HRV biofeedback app for resonance breathing training. More technical and sensor-driven than a generic breathing timer, with local-first data handling and a dedicated Google Play release.

• Built for Android with external heart rate monitor support.
• Uses local-first data handling instead of cloud-first storage.
• Published on Google Play, with its own landing page, setup guide, and sensor-first workflow.

A poster-like life-in-weeks planner that turns finite time into something editable and easier to act on. Reflective rather than productivity-first, with its own editorial voice.

• Maps life in weeks, seasons, and milestones.
• Keeps planning data in the browser and supports export workflows.
• Published as a standalone web app on its own subdomain.

A healthspan and physical-capacity explorer built around noisy, real-world inputs. It turns fitness, strength, body composition, and wearable signals into future-facing lower, base, and upper trajectories instead of a single fake-precise answer.

• Combines cardio and strength on an interactive timeline with age-based risk signals.
• Works with consumer-friendly inputs like VO2 estimates, body composition, grip, deadlift, or dead-hang fallback.
• Framed as a practical wellness outlook with uncertainty bands instead of a clinical-style prediction.

A timeline-first endurance fueling planner for turning duration, course aid, DIY bottle strategy, and product choices into a race-day script. Built as a private-use tool with science-informed targets and local-first planning data.

• Models carbohydrate, fluid, sodium, caffeine, and optional bicarbonate strategy from athlete, event, and weather inputs.
• Maps timed intervals, course-only aid, or hybrid DIY-plus-aid strategies into a station-by-station race script.
• Keeps custom products, saved plans, and shareable inputs browser-local unless the user exports or shares them.