You'll find Apple Watches and Whoop fitness trackers on a number of Mashable writers and editors' wrists. Fitbit may have popularized fitness trackers and the entire concept of "counting steps," but the brand has been eclipsed in recent years by feature-rich rivals.

When one of our reporters ran the New York City marathon wearing seven fitness trackers, Fitbit didn't impress.

But a new Fitbit could change that. The screen-free Google Fitbit Air hits store shelves May 19, and the $99.99 price tag is very tempting compared to an Apple Watch, which can cost $249 to $799. The Fitbit Air even has some unique features that could tempt dedicated Whoop fans.

We haven't had the chance to test the Google Fitbit Air yet (Steph Curry is not on our staff, unfortunately), but here are the top Fitbit Air features we're eyeing ahead of May 19.

Google Health Coach

When the Fitbit Air launches on May 19, Google will also debut the new Google Health Coach, which will be part of the Google Health Premium subscription ($9.99 a month or $99 a year).

Google Health Coach is an AI personal trainer that can make personalized workout and health recommendations tailored to you. Using the health, sleep, and fitness data collected by the Fitbit Air, you'll be able to get insights that go way beyond counting steps. The level of personalization is impressive, as the AI coach can take your sleep cycle, local weather, and medical history into account when designing workouts.

We don't love it when products require a paid subscription to unlock crucial features, but the amount of data available to your AI coach could set this tool apart from similar offerings. If you have a Pixel 4 smartwatch, you'll also be able to use this new feature.

A super lightweight design

For the Fitbit Air, Google seems to be prioritizing lighter weight over battery life. While the Whoop 5.0 and MG have a longer battery life, the Fitbit Air will be significantly lighter and smaller.

The new Fitbit weighs a mere 12 grams, less than half the weight of the Whoop 5.0, which weighs in at 26.5 grams (the Whoop MG is 27.3 grams). The sensor area, which Google describes as a "pebble," is also slimmer in height and narrower in width than Whoop.

When compared to smartwatches, it has a significant size and weight advantage. That's crucial for people who want to use their fitness tracker as a sleep tracker.

Despite the small size, the Air can still measure heart rate, heart rhythm, SpO2 (blood oxygen levels), sleep stages, and more. It also contains an accelerometer and a gyroscope.

Gemini voice and text chat

Within the Google Health app, you'll be able to talk to your AI coach by voice or text, with the conversations powered by Google's AI chatbot Gemini. You'll need your phone to do this, but for athletes who like to talk to their AI chatbot, you'll be able to talk in real-time. You'll be able to ask questions and make requests as you workout.

Perks for Gemini power users

Google offers several paid AI subscriptions for users who want to access the latest Gemini models and features — Google AI Pro and Google AI Ultra. With the debut of Google Health Coach, users on either of these plans will now get free access to Google Health Premium.

So, if you're already a Gemini power user, you can unlock extra features on the Fitbit Air at no extra cost.

Fitbit Air can use Gemini to "see" your workout and meal plans

As the maker of Gemini, one of the most advanced AI chatbots, Google has some big advantages over Apple, Whoop, Garmin, Nothing, and other smartwatch and fitness tracker brands.

Case in point: You can take pictures and upload them to Google Health Coach for analysis. A Google blog post states that users can "upload photos of gym whiteboards or snap photos of meals for nutritional analysis." You can also upload PDFs with health information.

Again, you'll need to use your phone to use this feature.

3-month free trial

Finally, Google has one more advantage over Whoop: a longer free trial. When you buy a Fitbit Air, you get three months of access to Google Health Premium, whereas Whoop only offers a 1-month free trial

For all these reasons, we expect the new Google Fitbit Air to be a serious competitor in the fitness tracker world and may even tempt some people to ditch their smartwatch. We're seeing growing interest in screen-free technology lately, which is one reason Whoop is so popular.

However, once again, Google is going all-in on artificial intelligence features. For athletes who are not interested in having an AI personal trainer or using Gemini as a workout buddy, the Fitbit Air may be a tougher sell.

Google touts its privacy features, but not everyone wants to provide such detailed health information to Big Tech.

The Google Fitbit Air is available for pre-order now for $99.99 at Amazon and the Google Store.