Does Viiiiva work with HRV applications? October 02, 2019 17:06 Updated Follow Yes, Viiiiva measures R-R intervals with 1ms accuracy and is, therefore, suitable to use with your favourite HRV apps. Related articles Can I use Viiiiva with my fitness equipment? With which apps can I use Viiiiva? How do I know which Viiiiva is mine when I'm in a group? Is Viiiiva waterproof? Bike computers, headsets and smartwatches Comments 0 comments Please sign in to leave a comment.