Is the app free to use? Sarah Russell May 06, 2021 20:06 Updated Yes, the app is free to use. Our wellness cards are available for purchase, check out our various membership offerings to see which is the best fit for you! Download our app now in the Apple App Store. Related articles What makes Vessel wellness cards better than other urinalysis tests? What is the shelf life of the wellness test cards? Isn't my hydration always going to be low if I'm testing first thing in the morning?