Try Pryme for Free

Now you can experience your Pryme hydration before purchasing Pryme Vessyl. Just download the Pryme app and test it out for yourself.

Our mission is to empower you to make healthier choices, so even if you don’t have a Pryme Vessyl, it’s important that you are able to experience being at your best.

With full access to the Pryme app, you’ll be able to track your personal hydration needs throughout the day. You’ll also be able to connect your activity tracker (Fitbit, Apple Health, Jawbone, etc) for the most accurate Pryme measurement.

You can download the app here. Below is a preview of the updated app.



Vessyl Production Update: April 2016

We have completed the initial analysis on the new Vessyl sensor technologies and now feel comfortable with a solution that will help us reach our desired goal: helping you get healthier. With the updated sensor, we will have the accuracy and reliability needed for us to meet our internal threshold. Unfortunately, we will need significant time to do the appropriate designing, building, testing, validating, etc to get to the final product. In essence, we are rebuilding Vessyl from the ground up.

We are estimating that the Vessyl will be ready in late 2017. Throughout this time, we’ll be sending out updates on our blog, so stay tuned for more information as we get closer to the final product.

What makes this any different than last time?

Though we are rebuilding Vessyl’s technology from the ground up, we are doing so with new leadership, better technology, and solid support from our investors, including Intel and OurCrowd. You can also see the production plan below for a rough breakdown of development:


For those who haven’t received your Pryme, we’ll continue to ship them out throughout the next few months. We have shifted our manufacturing facility to better manage the demand we are seeing for Pryme, which will also help expedite fulfilling your Pryme reservations. If you haven’t received your Pryme, you are still eligible for a full refund.

Please let us know if you have any question at

Pryme Integration Update (Fitbit)

Pryme Everywhere
We’re available to you whenever and wherever you need help, have any questions, or just want to connect with us. You can find Pryme Vessyl on Facebook, Twitter, Instagram, our blog, and now Snapchat. If you follow us on Snapchat (@myvessyl), you might even see some exclusive, behind-the-scenes updates. Don’t forget to share your experience with #prymevessyl.


As always, if you have any questions or comments, you can reach out to us at

Pryme Vessyl: Major Updates


We just released a major update to your Pryme Vessyl firmware. It is designed to significantly improve your daily experience with Pryme. The new firmware update will provide a much more reliable Bluetooth connection.

In your Pryme app, you should automatically receive the Firmware update request. If not, you can find the update in Settings > About Vessyl > Update Firmware.

New App Features
In addition to the new firmware, we have also released an app update (v1.3). In this update you’re now able to see your daily Pryme chart from any screen by rotating your iOS device to landscape mode. We’ve also added a safety notification that let’s you know if you are drinking too much, too quickly.


As always, if you have any questions or comments, you can reach out to us at

Vessyl Production Update

What’s happening with the original Vessyl?

Many of you are asking this question, and we’d like to share an update on where we are with Vessyl development. In October we mentioned that we were going to take some time to assess what is truly needed to get Vessyl to a place where it will actually help you get healthier. Unfortunately, as of yet we have not met that standard. Though we’re able to build a small number of Vessyls with this technology, it’s critical that every Vessyl we ship has the accuracy and reliability of the one before it.

All of our backers have shown immense patience and support, and we don’t take that for granted. You’ve waited a long time, and in that time we’ve changed parts of the technology to meet our goal. We are asking for a bit more time to assess additional technologies that can supplement the current sensors to achieve the standards we desire. With the success of Pryme Vessyl, we are hiring more talented folks to help manage both products.

We will be doing a comprehensive review of our current technology and some additional technologies. In March, we’ll be able to give you a more accurate timeline on the delivery of your Vessyl.

Below is a link to an early press demo of the technology we are improving…


Where’s my free Pryme?

The quick answer to this is… it’s on the way. The response to Pryme Vessyl has been great; so great that the retail demand threw our estimates off balance, leading to supply constraints. Due to these supply constraints, we are slowly moving through the list of free Prymes. If you haven’t already received a free Pryme, look out for an email from us in the coming weeks to get your shipping information. Note that orders outside of North America will see some delays due to customs. We are putting a solution in place to ensure international orders are delivered on time. We’re also prioritizing orders for those with iOS devices until we complete the Pryme app for Android.

In an effort to better fulfill the demand for Pryme, we are shifting our manufacturing to a larger facility. This will also expedite the shipment of free Prymes.

As always, if you have any questions or comments, you can reach out to us at