About Yori
Yori is a cycle awareness app built for men — partners, fathers, and brothers. It helps men understand what the women in their lives may be experiencing throughout their menstrual cycle, using science-based guidance, AI-powered daily insights, and support for six conditions including PMDD, Endometriosis, and PMOS (formerly PCOS).
Built on a strict privacy-first foundation — everything stays on the user's device, with no cloud sync, no account required, and AES-256 encryption — Yori is designed to build understanding and genuine connection, not to predict or manage anyone's behaviour.
Yori is developed and published by Yori Ltd (UK Company #17105944) and is available on Android.
Key facts
The founder
Scott is a solo indie developer based in West Yorkshire, UK. He built Yori for himself — as a partner trying to understand and better support his wife — and turned it into a full app alongside his day job. Yori is his first commercial app release.
He describes Yori as "the app I needed but didn't exist." The ethical positioning — refusing the "tactical advantage" framing common in the category — is something he feels strongly about.
"I built Yori because I wanted to understand what my wife goes through — not to predict her or get some kind of edge, but to genuinely show up better. I was surprised there wasn't already something like this. So I built it."
— Scott, founder of YoriPress coverage
Startup Fortune · June 2026
"Scott Built Yori for Himself — to Stop Being Unprepared for His Wife After 18 Years Together"
Coverage by Amilia Bon at Startup Fortune — an early profile of Scott and the story behind why Yori was built.
Read on Startup Fortune ↗-
The men's health gap nobody talks about
There are hundreds of period tracking apps for women. There are almost none built honestly for the men in their lives — without resorting to "tactical" or manipulative framing. Yori is trying to change that.
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The ethical line in a problematic category
The "cycle tracking for men" category is growing fast, and much of it uses language like "hormonal intelligence" and "tactical playbook." Yori explicitly refuses this framing. Its consent gate, non-pathologising copy, and local-first privacy are deliberate ethical choices — and a genuine differentiator.
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PMOS: the condition you might not have heard of
In 2026, the global medical community renamed PCOS to PMOS (Polyendocrine Metabolic Ovarian Syndrome), reflecting a more accurate understanding of what the condition actually is. Yori is among the first consumer apps to adopt the updated terminology.
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Solo developer, AI as co-founder
Yori was built entirely by one person — alongside a full-time job — using AI tools as a development partner. The architecture, the copy, the safety engineering, the condition research: all of it from a single developer in Yorkshire.
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Endometriosis: what her partner needs to know
Endometriosis affects 1 in 10 women. Most of their partners have very little understanding of what it means for daily life. Yori's endometriosis guidance is designed to close that gap — with care, not clinical detachment.
What Yori is not
Yori is deliberately positioned away from the following:
- ✕A tool for predicting or timing anything without her knowledge
- ✕A "hormonal advantage" or relationship optimisation tool
- ✕A replacement for professional medical support
- ✕A platform that uploads or monetises cycle data
Get in touch
For interview requests, review access, further information, or to request additional assets — email us. We respond to all press enquiries personally.
Email yoriapp@pm.me ↗