Erfkern is a one-person studio building small, purposeful apps — the kind of everyday planning and preparation most software companies don't bother with. Built privacy-first, hosted in Europe, priced honestly.
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A one-time digital resilience check — the practical things the people around you would need to know if something happened to you. No account, no subscription, one clear report.
Home garden planning built around New Zealand's actual climate and growing seasons, not a generic global calendar.
A digital address book for families — shared contacts, birthday and anniversary reminders, and an easy way to actually send the card.
Weekly dinner planning that works around your household — who's eating, who isn't, and what's already in the fridge.
Mortgage readiness, explained plainly, for brokers to hand to their clients before the hard conversations start.
A 28-day family meal planner paired with a simple workout tracker, built to work together.
Why Erfkern
01
Every app runs on a server in Germany, under GDPR. Nothing is stored on US cloud infrastructure, and nothing is sold.
02
No app here tries to be everything. Each one solves a specific, real problem and stops.
03
No dark patterns, no engagement metrics to hit. Just tools that work, made by someone who uses them too.