I have 3 devices. Which NIH Toolbox V3 subscription should I choose?

NIH Toolbox V3 subscriptions are tied to the number of devices you intend to use. If you have 3 devices, you will need to purchase the 6-device subscription. This will allow you to add up to 6 devices.

Alternatively, you can choose to purchase two separate 2-device subscriptions (under two separate Apple IDs) for a total of 4 devices.