First-wave usability testing — five users, a live MVP, and what actually needs fixing
Five usability sessions on the live product with people at different levels of sustainability engagement. Not a controlled lab — they used the real app and gave unfiltered feedback. I wanted to know: does the product create value in a first session, and would someone come back? Analytics are connected and usability testing done — but I'm still figuring out what else is needed to properly understand whether the product is actually working.
Tools used
Claude, Notion, PostHog, meineterra.de
Type
Validation / Usability Testing
Time
Two weeks
Outcome
Four of five participants connected with the problem statement unprompted. Two said they'd use it before shopping. One said they'd pay after a trial. Clear improvements to prioritise: less text, add images, surface German brand origin, add a save feature. Navigation worked — no one got lost. Home page headline changed from "Better everyday choices" to "Sustainable everyday choices" after one participant said the original felt slightly judgmental.
Key insights & challenges
Every participant skipped the explanatory text and went straight to the brand links. That's not a copy problem — it's a hierarchy problem. The links are the most valuable part of the page and they're not treated that way yet.
Two people independently asked whether the links were sponsored. Neither thought they were — they just wanted to be sure. The trust model is working, but the editorial independence statement needs to be visible earlier than a menu item.
One participant made a comment that reframed how I think about retention: some swaps are only useful once. You buy wool dryer balls, you never need that recommendation again. The product isn't useful every day — it's useful at the right moment.
Looking into further frameworks on how to better validate a product idea besides usability testing and connecting product analytics.