About JustFit
JustFit started as a personal project: an adaptive training coach that genuinely adapts to your life — not an app that makes you feel guilty when you miss a day.
The story
Most fitness apps work like this: you get a fixed schedule, and if you miss a day you're "off the wagon". The app pushes notifications, compares you to others and makes you feel guilty for taking a rest day.
That didn't sit right with me. I wanted a coach that understands when life gets in the way. One that knows when you'd be better off resting. One that doesn't punish you for a bad night's sleep or a busy week at work.
JustFit is built on one principle: consistency beats intensity. A light workout on a hard day is better than nothing at all. And nothing is better than a perfect workout you skip because the bar was set too high.
I build JustFit as a one-person team, from the Netherlands. Privacy isn't a PR exercise here — it's an architectural decision I made from day one.
What we stand for
These principles drive every decision: from which feature to build to how we store your data.
A completed session is better than a perfect session you skip. We reward regularity, not performance.
Sleep, stress, pain, pregnancy, travel and recovery periods change the plan immediately. The system adapts to you.
When in doubt, we choose the safer option. Pregnancy mode, injury filtering and recovery detection are built with safety as the first filter.
Every planning decision is traceable to an understandable rule. No black-box AI. You can always see why you got this plan.
The system can weigh many signals, but the daily session always has one clear primary goal. No confusion, no contradictory advice.
Data minimisation, explicit consent, clear storage boundaries and user control are core product behaviour — not just legal text.
Workout interactions must work with one thumb, at a glance, in two seconds. Screen stays on. No distractions.
Our mission
"Help people stay consistently active by turning real-life constraints into safe, clear, daily training decisions."
JustFit is not a social network, not a medical device and not a black-box AI. It is a privacy-aware, adaptive daily training coach — for everyone who wants to stay consistently active, whatever life brings.
Technical transparency
We believe in openness. Here's how the app works technically, where your data is stored and what we do and don't do.