David de Souza

Creator of Hyper Focus, the to-do app for people with ADHD. Independent developer in Cascais, Portugal.

The best way to reach me is email: david@desouza.me. I'm also on X at @DaviddeSouza.

What I'm Working On

Hyper Focus, the to-do app for people with ADHD. Tasks, reminders and calendar on one screen, on iPhone, iPad, Mac and Apple Watch.
Cognitive Biases, a site about the ways our thinking goes wrong.
Create a Life Biography of your family members, one question at a time.

The Top 1% of ThinkersThe stages of adult thinking, and how the top 1% get there.
Advice for the Average PersonWhy advice for the average person misleads, and what to ask instead.
The Art of Giving and Receiving ComplimentsFive levels of compliment, from throwaway to memorable.
Discounting the Opinions of People That You LikeWe judge ideas by the messenger. Three ways to see past it.
The Most Interesting Person in the RoomBetter openers than the three questions everyone asks.

All writing: articles, mental models, interviews, book summaries, and older posts on running and life experiments.

I started Life Questions, a community that meets in person to discuss the big questions, with chapters in several cities.

Mindfulness Journal, a daily journal for gratitude and meditation, featured in The Washington Post and USA Today.
Wrote for Forbes and The Guardian.
Decision Journal, a pocket-sized journal for making better decisions.