Paul Calver

About

Paul Calver, Precision Nutrition Certified Master Health Coach and iOS developer

I'm Paul Calver. I've been building iOS apps for 15 years, and I'm a certified health coach. I now build health apps that take both crafts seriously.

Coaching credentials

All certifications are from Precision Nutrition, one of the most widely respected coaching-certification bodies in the industry:

You can verify my listing in the official Precision Nutrition certified coach directory.

Engineering

Fifteen years of professional iOS development. Current app work spans HealthKit, the Screen Time API, and complex on-device analysis: the plumbing that health apps depend on and most coaching businesses can't touch.

How I build

The behaviour-change science I trained in is mostly ignored by the apps people actually use. Streaks, guilt loops, and dashboard anxiety are engagement mechanics, not coaching. My apps follow a different set of rules: no streaks that reset to zero, no shame-based copy, honest uncertainty when the data is thin, and evidence from your own life over gamified abstractions.

Elsewhere

I write about agentic coding, health, sleep, stress, and behaviour change on LinkedIn, and canonical versions of everything live in Articles.

Website measurement

I count clicks on download links for my apps to understand which pages help people find the app. Each event contains only a fixed campaign name; Cloudflare adds the event time. This counter sets no cookies and stores no IP address, referrer, device identifier or personal content. Counts are best effort and may be sampled. They are not unique people or installs. The browser’s Do Not Track and Global Privacy Control signals disable these click events. Cloudflare also processes requests to host and protect this website. Separate Cloudflare Web Analytics excludes EU visitors. Cloudflare privacy information.