What’s Optimal (whatsoptimal.com) participates in affiliate marketing programmes. This means we may earn a commission when you purchase a product or service through links on this site, at no extra cost to you.

We currently participate in the following affiliate programmes:

This list is updated as we join additional programmes.

Per the New Zealand Advertising Standards Authority (ASA) Influencer Guidelines, affiliate relationships are disclosed in every individual piece of content containing affiliate links, not just on this page.

Our editorial conclusions are never influenced by affiliate relationships. If the best product for your needs is not one we earn a commission on, we will recommend it anyway and note that it is not an affiliate link.

We only recommend products we have independently evaluated against the available evidence.