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Google's Fitbit revamp promises smarter coaching and longer battery life

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  Published in Health and Fitness on Monday, October 27th 2025 at 23:20 GMT by Digital Trends
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Google’s Fitbit Revamp Promises Smarter Coaching and Longer Battery Life

Google’s acquisition of Fitbit has been in the news since the deal closed in 2021, but it has taken a while for the company to unveil a concrete roadmap for the wearable‑tech brand. Digital Trends’ recent look at Google’s announced Fitbit revamp reveals a clear strategy: re‑engineer the brand’s flagship line of health trackers with a sharper focus on AI‑driven coaching and a much longer battery. The company has also announced a new tier of premium services that will deliver deeper, data‑rich insights to the everyday user.

A New Hardware Family

The centerpiece of the revamp is a refreshed hardware lineup that includes three new Fitbit models:

The Sense 2 is the flagship device, now featuring a larger, higher‑resolution display and a newly designed heart‑rate sensor that claims to improve accuracy by up to 15 % over the original Sense. Fitbit’s engineering team says the new sensor uses a hybrid photoplethysmography (PPG) algorithm that blends optical heart‑rate detection with a low‑power electrical method. This hybrid approach allows for more reliable measurements during high‑intensity workouts and when the wrist is not perfectly still.

The Versa 4 is positioned as a mid‑tier smartwatch. It has a longer “Fitbit Coach” AI module than its predecessor, which offers workout suggestions based on your recent activity, weather, and personal goals. Fitbit claims that its AI coaching will be able to suggest not only the duration and intensity of a workout but also an optimal warm‑up and cool‑down routine, reducing the likelihood of injury.

The Charge 6 is a more compact, subscription‑friendly option for users who want a daily health monitor without a full smartwatch. Its “Sleep Score” algorithm now incorporates a second skin‑temperature sensor that provides better insight into circadian rhythm shifts.

Smarter Coaching Powered by AI

Google’s approach to “smarter coaching” builds on the data that Fitbit already collects. The brand’s new AI‑driven “Fitbit Coach” system was first teased in a blog post last month. It’s designed to be an autonomous coach that learns from the user’s patterns and recommends personalized workouts, breathing exercises, and even nutrition tips. The AI is powered by Google’s Vertex AI platform, enabling it to ingest millions of data points from Fitbit’s cloud and provide real‑time feedback.

The article references a side‑by‑side comparison with Apple’s Fitness+ and Samsung’s Health+ programs. Fitbit says its new Coach can run in the background, suggesting workouts in the middle of the day and even sending gentle nudges when the user is sitting for too long. Fitbit’s data scientists claim that the Coach can predict injury risk by comparing heart‑rate variability with movement patterns during a workout. This predictive analytics is a step beyond the simple “calories burned” metrics most trackers provide.

Google has also announced a new subscription model called “Fitbit Premium” that will give users access to deeper insights: personalized health goals, advanced sleep analysis, and more granular heart‑rate data. Fitbit Premium is now available as a free trial for one month and then costs $9.99 per month (or $99.99 per year). The subscription adds “Coach Sessions,” which are 10‑minute video sessions with a certified trainer that integrate directly into the watch’s interface.

Battery Life Gains

Battery life is the most tangible win for Fitbit’s hardware revamp. The original Sense ran for roughly 10–12 days on a single charge. The new Sense 2 now claims a 14‑day battery life in typical use scenarios (which includes at least one workout, 10 min of heart‑rate monitoring, and 1–2 hours of screen usage per day). Fitbit’s engineering team attributes the increase to a more efficient OLED display and the new sensor’s lower power consumption.

The Versa 4’s battery was improved from 4 days to a projected 4 days, but the watch will consume less energy during “Coach” suggestions. The Charge 6 now offers a 7‑day battery, up from 6 days, thanks to a more efficient chipset and a lower‑resolution display.

A separate technical note on the company’s developer site explains that the battery improvements are partly due to the new “Fitbit OS 10” firmware, which introduces power‑saving modes that automatically dim the display and reduce background services when the user is not actively interacting with the watch.

Integration With Google Services

The revamp also signals a deeper integration with Google’s broader ecosystem. Fitbit devices will now sync automatically with Google Fit and Google Assistant. The article quotes a spokesperson from Google’s Wear OS team who said, “Fitbit’s focus on health and wellness aligns perfectly with Google’s mission to help people live better lives.” The integration will allow users to ask Google Assistant for personalized health insights or to set reminders for hydration or medication directly from the watch.

Additionally, Fitbit’s “Premium” subscription will include a “Google Pay” feature for in‑watch purchases. Users can pay for a workout session or a virtual yoga class with a tap, without having to leave the watch interface.

The Bottom Line

Google’s Fitbit revamp is a major shift toward a more data‑driven, AI‑enabled wearable experience. With a fresh hardware lineup, longer battery life, and a subscription tier that promises personalized coaching, Fitbit is positioning itself as a direct competitor to Apple Watch and Samsung’s newer watches. Whether the new AI coaching and health metrics will resonate with the millions of Fitbit users worldwide remains to be seen, but the company’s clear emphasis on better data and longer battery life signals a serious commitment to staying relevant in the crowded wearables market.