Is this a subscription or a one-time payment? John May 08, 2019 14:46 It’s a one-time payment. Once you buy HIIT., you won’t be charged again at any point and you’ll have it for good! Related articles I’m a complete beginner to working out. Is Build. suitable for me? How long will I have access to HIIT for? What makes Cut. different to other fat loss programmes? What are the benefits of training with the HIIT Guide? How do I access the guide and is it available in PDF format?