Build the change you want to see in the world.
I build the tools I use. Small browser tools for the gaps I kept seeing. One job each, no sign-ups, all in your browser and stored locally. Nothing's saved to the cloud. Try them out, then meet the person behind them.
The tools
08 liveWho doesn't follow you back?
Drop your Instagram export: see who doesn't follow you back, who unfollowed you since last time, who's ghosting your request. Then open profiles in batches.
Which watershed are you in?
Type any U.S. address and see the watershed it sits in (the USGS Hydrologic Unit Code boundary), drawn on a live map, from sub-basin down to local subwatershed.
What exactly is dougan?
豆乾 is an umbrella term, not one food. A field guide to 13 kinds of Taiwanese dried tofu, sorted by how each is pressed, braised, fried, or fermented. Photos and diagrams, runs in your browser.
How old is my cat in human years? (or dog or pet)
Enter your cat's age (or birthday) and see how old they'd be in human years, on the real vet curve (not the multiply-by-7 myth). Live graph you can scrub across, runs in your browser.
Is your wallpaper truly OLED black?
Drop a wallpaper and see what percent is true #000000, the black that switches AMOLED pixels off. Then snap the near-black pixels to pure black and download a PNG. Runs in your browser, nothing uploaded.
Need a QR code for your WiFi?
Turn your WiFi network (or any link) into a QR code, add a caption printed above it, and download a PNG or SVG. Your network password never leaves your device.
How many weeks do you have left?
Enter your birthday and see your whole life as a grid, one box per week: the lived ones filled in, the current one ticking live. Or map any span — in seconds, days, weeks, months or years.
How much time do I have left with my parents?
Enter their birthdays (and anyone else you love) and see the time you statistically have left together, in years, months, days, or visits. Averages, not predictions, counted gently. Runs in your browser, nothing uploaded.
In the workshop
More tools land here as I build them.
Oh, and who I am
The humanIt sits in your team's daily work, writes the summaries, captures the decisions, and remembers who did what.
And the person behind the tools. I'm Kelvin, a builder and product manager. I spent ~3 years shipping crypto products at Coinbase, was employee #2 at a pre-seed startup, and studied at the University of Michigan School of Information. These days I'm building Tinu AI.
Where I've built
ExperienceCoinbase · Product Manager
Owned USDC Rewards on Coinbase Prime, launched Wallet Explore 0→1, and shipped ML coin recs, cutting CB Pay's buy-funnel drop-off 60% and Prime reporting time 95%, then led the Prime Canada launch.
Sustainable Bitcoin Protocol · Head of Product
Employee #2 at a pre-seed startup: led product, engineering and design for renewable-energy-certificate verification in Bitcoin mining.
Microsoft · Capstone UX Designer
Redesigned accounts.microsoft.com: new navigation and activation surface, ~2× projected engagement.
EY · Workforce Advisory (PAS)
Change-management personas and impact analysis for a Fortune 500 client.
University of Michigan · M.S. Information
M.S. Information · B.B.A. (Ross, Magna Cum Laude) · B.S. Information (4.0). Taught SI 305: Python & Pandas.