You Can Join Whoop for $0/£0 ! & Get a Free WHOOP 4.0
Get a free Whoop 4.0 band and a free first-month subscription when you sign up for a minimum of 6 months. Link: whoop.com (discount automatically applied)
If you are a Founder Member you will get a free subscription to (approx) September 2023 after which you will need a paying subscription.
Must Read: Detailed Review of the Whoop 3.0 Band
When is Whoop 4.0 Shipping?
Edit: Now (USA & EU), albeit in limited numbers.
The official first day of shipping for Whoop 4.0 was Monday 27th September (hmmm!). However, as far as I can tell, all orders are subject to a delay and orders seem scheduled to start shipping week commencing Monday 1st November 2021. You can check Whoop.com for your latest order status if you have already reserved your free upgrade.
Orders will most likely be shipped according to the order when they were received (I’ve had no information to indicate that Affiliates like me get preferential treatment). One exception might be for new customers who might ump the queue as existing members generally have a working 3.0 band already.