If you have over 10 devices that you’d like to use to collect NIH Toolbox V3 data, there are two options.
The first option is to create a second Apple ID. Each Apple ID will allow you to purchase subscriptions for another 10 devices. So for example, if you have 28 devices, you could create 3 Apple IDs to purchase subscriptions on up to 30 devices.
The second option is to contact NIH Toolbox Customer Support for volume purchasing through Apple Business Manager or Apple School Manager.