Harelin is a one-person studio in California, making software, practical handbooks, and children’s picture books. Different shelves, the same care in each.





Two web apps, each built to do one job well.
Your California security deposit has a deadline. Find out whether your landlord met it.
Enter your move-out date and a few facts about what happened. The check is free and tells you what Civil Code section 1950.5 required of your landlord. If they missed it, generate a demand letter that quotes the statute, with your dates and amounts filled in.
Free to check. The letter is $29, one time. Two minutes, no password.
Stop forgetting the things that keep life running.
Bills, car maintenance, health checkups, home repairs. LifeOnTrack counts down to each one, sends a morning digest of what needs attention, and sets the next date when you check something off.
Free to use, in the browser or as an Android app.
The 200 Methods handbooks by Rick Smith, in reading order.
200 methods for a non-toxic, eco-friendly life. Clean your home, care for your family, and understand the chemistry of why it works.
Grow food and flowers, defeat pests naturally, and understand the science of why it works.
Fix what you can, maintain what matters, and know exactly when to call a pro.
Bake bread, culture dairy, ferment vegetables, and know which ones are worth making yourself.
Maintain what matters, spot trouble early, and know exactly when to call a pro.
Kindle and paperback editions return to Amazon shortly. This page will link to them when they do.
Picture books about two cockapoo puppies.
The first book: how two puppies, the last of a farm litter, were picked out and brought home.
Every Tanner and Tilly book is a full-color picture book, written and illustrated for reading aloud. This one is where the series begins. The backyard adventures follow, one book at a time, and each will appear here as it is released.
Available soon.
Harelin is one person in California, making things to a standard, not a schedule.
Software that does what it says. Handbooks that explain why. Picture books worth reading twice. Each is made for the person on the other side of it, and with no investors and no growth targets, that person is the only one to answer to.
They apply to everything on this page.
Nothing here is paid for by your attention. If something costs money, it says so, once, with the price.
No countdown timers, no hidden subscriptions, no buttons that do something other than what they say.
What you enter is used to do the job you asked for. It is not sold, shared for marketing, or kept longer than it needs to be.
Questions, feedback, or support for any of the above. Every message is read by the person who made the thing.