Solo developer · New Zealand

I make small, honest software that solves one real problem beautifully, and then gets out of your way.

No ads, no tracking, no nagging. Some of these are yours to buy once and keep; others run on servers, so they cost what they cost to run. Either way, nothing sneaky.

See what I'm building

Work

Things I've made

Tideline NZ

A rock-solid offline tide app for Kiwi boaties, anglers, surfers, kayakers and divers. It gives you trustworthy tide predictions for 310+ spots around the country. Once it's on your phone it works offline, exactly what you want when you're at a remote boat ramp with zero bars of signal. Now on iPhone and iPad, as well as Android and Windows.

Offline No ads Bite times Launch window

Visit Tideline NZ App Store New Google Play Windows Store

Fine Day

Answers one deceptively hard question: when can I hang the washing out? Fine Day scans 14 days of hour-by-hour rain forecasts to find your dry windows. Handy for washing lines, lawn mowing, painting, concrete pours, and anything else the weather keeps interrupting.

Free 14-day forecast No ads

Visit Fine Day Google Play

More in the works

There are a few more ideas quietly simmering away. They'll show up here once they're properly baked and genuinely worth your time.

About the developer

Hello, I'm James Sumner

I'm an independent software developer based in Auckland, New Zealand. SumnerD / Sumner Software Development is a one-person operation, just me. The name comes from my nickname growing up, sumnerd (some nerd).

Honestly? I got tired of everyday apps crammed with ads and subscriptions that quietly nibble away at your bank account. So I set out to build the opposite: no ads, no tracking, no nagging, and no charging you monthly for something that runs perfectly well on your own phone.

Tideline NZ and Fine Day are the first of them, both built and maintained here in New Zealand. Buy once or use free, and they're yours.

Some things genuinely do need a server behind them, and when I build those I'll say so plainly and charge honestly for what it costs to run. What won't change is the rest of it. If that's the sort of software you've been missing, you're in the right place.

Get in touch

Say hello

Got an idea worth building, a bit of feedback on the app, or just want to say hello - I'd genuinely love to hear from you.

hello@sumnerd.co.nz