Editorial policy.

Who writes the blog

Every post on the Greatr blog is written by one of Greatr's two co-founders, Jip Groen or Jeroen Snel, and carries their name. We are not scientists, doctors or therapists, and we never write as if we were. We are people who read the research carefully and try to turn it into things you can actually do tomorrow.

What we write about

Habits, routines, screen time and focus, and the small daily practices around them, such as reading, journaling and meditation. We start from questions people really ask, and we answer them with the smallest useful step, not a lifestyle overhaul.

How we choose sources

• Peer-reviewed studies first, ideally the original paper, plus recent systematic reviews and meta-analyses where they exist.
• Guidance from public health bodies, such as the World Health Organization, for health basics like sleep and exercise.
• Official documentation, such as Apple's iPhone User Guide, for settings and features.
• Books such as Atomic Habits, Tiny Habits and Deep Work for ideas and language, never as the only proof of a claim.

How we read a study

Before we repeat a finding, we look at how it was found: how many people took part, what was actually measured, how long it ran, how big the effect was, and whether other researchers managed to repeat it.

Books give us the language. Studies decide what we claim.

When a famous result did not hold up, we say so, as our posts do for ego depletion and for the idea that a phone on your desk drains your focus. When the evidence is thin, we say that too.

Evidence and tips, kept apart

What research found comes with a link to its source and the year it was published. Our own suggestions are written as suggestions. Worked examples with a name in them are fictional, and the post says so.

Health topics

Some posts touch on sleep, stress and mental health. There we stay on the careful side, link to clinical and public health sources, and tell you when to talk to a doctor. Nothing on this blog is medical advice.

Updates and corrections

Every post shows when it was last updated. We update a post when the research moves or when we find a mistake, and the date changes only when the content does. Spotted an error? Email hello@getgreatr.app and we will look into it.

Greatr is our product

We make Greatr, the iPhone app this blog belongs to, and our posts mention it where it fits the topic. It never decides what a study says: if the research does not support something, we do not write it, whether or not it suits Greatr. We do not use affiliate links, and no post is paid for by anyone else.