Launching early 2027
Be first to know when 28FOUR arrives.
Join the 28FOUR launch list for product-development updates, first access and founding-member opportunities.
What we’re building
The 28FOUR Starter System.
- Four reusable glass phase bottles
- The first supply of all four formulas
- 28FOUR app access
- Guided phase tracking
- Refill reminders
Expected pricing
£109
Expected 28FOUR Starter System price · one-time
Individual phase refills expected from £29.99
This will not be a fixed monthly subscription. Joining the launch list is an email signup only — it reserves nothing, takes no payment and creates no obligation to purchase at £109 or any other price.
Final pricing and formulations remain subject to completion and professional review.
Each phase runs out at a different rate. Your Luteal formula may be needed more frequently than your Ovulatory formula — which is exactly why 28FOUR will not use a fixed monthly subscription. The app helps you keep track and refill only the phase you need.