A one-person software studio
I’m Mike Chiou. I build focused tools for photography, breathing, endurance, and making sense of the time ahead.
The work
Five focused tools, each with a purpose of its own.
Two product releases.
Three non-commercial projects.
All independently made.
Your JPEG has the look. HDR adds the light.
Keep the film simulation. Find real SDR and HDR samples on the ToneLatch site.
Bring the highlights in your finished camera JPEGs to HDR displays, without regrading. ToneLatch uses the matching RAW for highlight information and keeps a standard SDR version in the same Ultra HDR file.
Free Basic app · Optional paid Plus
Apple silicon · macOS 14+ · Matching RAW + JPEG files
Your breathing pace, informed by your heartbeat.
Explore how your body responds to different breathing rates. RHz compares the timing between heartbeats during a guided sweep, helping you find a personal starting pace to practise. Session data stays on your device.
Free Android app · No subscription
Compatible Bluetooth heart-rate monitor required · General wellness use
A life in weeks. A little more perspective.
See your life as a calendar of weeks. Mark the milestones, sketch the seasons ahead, and make space for the things you want to do. A quiet place to reflect on how you spend your time.
Free web app
A reflection and planning tool · Not a lifespan prediction
A possible trajectory, not a verdict.
Explore how your fitness today may shape your physical capacity as you age. Use everyday fitness signals to build an outlook with ranges and visible assumptions, then consider a practical next step.
Free web tool · No account required
Wellness estimates for planning · Not medical advice or a lifespan prediction
Plan the fuel. Race the race.
Turn race duration, weather, aid stations, and what you can carry into a practical fueling plan. Work out your bottle strategy before the race, with a timeline you can follow along the course.
Free web app
Planning estimates · Practise and adapt your strategy in training
The person behind the projects
Mike ChiouDesigner & developer
I build tools for things I care about.
Then I put them out into the world.
Logic & Light brings together my interests in photography, health, endurance, and how we spend our time. Each project starts with a question I want to explore or something I want to use myself.
Keep each tool focused on the job it is here to do.
Make assumptions, requirements, and uncertainty visible.
Give the small interactions as much thought as the big idea.
A direct line to the maker
A question about a project, a useful suggestion, or a detail I missed—I’d like to hear it.
