Wearables

Your smartwatch costs £0/year to track sleep. WHOOP is £180.

Most phones and smartwatches come with built-in sleep tracking. You already own one.

Dedicated fitness trackers: £0–£99 upfront

Oura Ring, Samsung Galaxy Ring, HART, Ultrahuman, RingConn — all track HRV, sleep, recovery. Most are one-time purchases, no subscription.

WHOOP and similar: £180–£300/year

Subscription models charge recurring fees for data you already generated. The strap costs £30. The rest is software — decided by their business model, not your biology.

What subscription actually buys

Real-time trends, coaching algorithms, community features. But the raw sleep data—duration, REM, deep, HRV—is identical whether you pay £0 or £180.

The honest question

Do you use the coaching features? If yes, the subscription might be worth it. If you only check your numbers once a day, free wins.

Screenshot: the choice matrix

Device: one-time cost ✓ | Data: identical ✓ | Coaching: subscription-only | Decision: yours. What matters is tracking your composition trend, not chasing perfect sleep scores.