Short answer
No watch here needs a subscription to work. 41 of 53 come from makers that sell an optional paid tier; what it gates ranges from video classes to coaching and deeper analysis.
Apple Fitness+ (Apple): $79.99 a year. No watch feature requires it; it adds guided workout and meditation video classes that use the watch's metrics on screen
Google Health Premium (Fitbit): $119.88 a year. Google: 'Most workouts require a Google Health Premium membership', 'Most [mindfulness] sessions require a Premium membership', Stress Management Score 'Detailed score breakdown available with Premium', plus Gemini coaching
Garmin Connect+ (Garmin): $69.99 a year. No watch feature requires it: Garmin's chart keeps activity details, health stats, performance metrics, Garmin Coach plans, courses and LiveTrack in the free app. Connect+ adds Active Intelligence AI insights, nutrition logging, a desktop performance dashboard, live activity on the phone, 3D maps and offline Garmin Trails downloads
Zepp Aura (Amazfit): $69.99 a year. No watch feature requires it; Amazfit sells workout and recovery data in the Zepp App with no subscription. Zepp Aura adds unlimited AI sleep-assistant chats (free users get one message a day), detailed weekly and monthly sleep reports, and the full sleep and meditation music library.
Polar Fitness Program (Polar): $107.88 a year. No watch feature requires it. Polar: 'A subscription to Fitness Program is not required to fully enjoy Polar products or the Flow service'; it adds adaptive 4-week cardio, strength and mobility plans in Polar Flow. Street X is not listed among the compatible watches on Polar's US Fitness Program page
Withings+ (Withings): $99.5 a year. ECG recording, AFib detection and baseline metrics stay free (Withings: "Do I need a subscription to access my health data? No."). Withings+ adds Cardio Check-Up (cardiologist ECG review within 24 hours), the Readiness score, the AI Health Assistant and a nutritionist consultation.
The question is not whether a tier exists but whether something you would buy the watch for sits behind it. Each watch page quotes the maker on what the tier unlocks, and adds two years of it to the watch price as an optional figure, so the two can be compared at a glance.
12 watches here come from makers that sell no paid tier at all.
Maker claims quoted on this page are the maker’s own and are labelled as such. This page is general information, not medical advice.
Everyday smartwatch · watchOS
Best for: First-time iPhone watch buyers, or a child's watch set up through Apple Watch For Your Kids
Fitness · Fitbit
Best for: Budget buyers on either phone platform who mainly want activity, sleep and workout tracking
Rugged outdoor · Garmin
Best for: A buyer who wants a durable, readable-in-sun tracker for the outdoors on the smallest budget
Every watch here needs a phone to set up and to sync. Away from it, 9 have an LTE version for calls and messages, 28 store music, and 6 combine LTE, music and contactless payments.
Only 4 of 53 watches here have a published update promise, from 3 to 5 years. The rest are 'not published'.
Every specification explained, with the real numbers from the catalog behind each one.