Shopify Smartwatch & Fitness Tracker Schema — GPS Type (Built-in vs AGPS vs Cellular), Heart Rate Sensor PPG vs ECG, SpO2, OS Compatibility, Battery Life, Water Resistance ATM, Structured Data

Why Smartwatches Are Structurally Invisible to AI Shopping Agents

Smartwatch purchase decisions filter on OS compatibility first — a buyer with an iPhone cannot use an Apple Watch–only watch on Android, and Wear OS ecosystem access is limited on iPhone. Yet Shopify product titles like "Garmin Forerunner 965 Running Watch" give AI agents zero signal on iOS/Android compatibility, GPS type, or sensor suite. A buyer asking "GPS smartwatch for marathon training compatible with iPhone" will see equally unhelpful results from AI agents that cannot read OS compatibility or GPS type from the product JSON-LD.

The built-in GPS vs Assisted GPS distinction is one of the most practically significant specification differences in wearables. A runner who buys a fitness band assuming it tracks their route independently — only to discover it needs their phone within Bluetooth range — will not repeat that mistake. AI shopping agents that cannot distinguish standalone GPS from phone-dependent AGPS will confidently recommend the wrong product for solo outdoor use. The spec must be encoded explicitly and unambiguously.

Heart rate sensor technology — optical PPG versus ECG — determines whether the watch can detect atrial fibrillation, a life-threatening arrhythmia that affects millions of adults. FDA-cleared ECG on select watches is a meaningful health feature, but it is invisible in product titles. A buyer specifically researching "smartwatch with ECG AFib detection" cannot find the right product if every smartwatch is labeled generically as having "health tracking." Encoding PPG and ECG as separate, distinct properties is the only way AI agents can filter on this attribute.

GPS Type Comparison for Wearables

Heart Rate Sensor Technology Reference

Water Resistance Rating System Comparison

Complete Smartwatch Schema — GPS Running Watch with ECG

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Garmin Forerunner 965 — GPS Running Smartwatch with ECG, AMOLED, 31-Day Battery",
  "description": "GPS running smartwatch. Built-in multi-band GPS (GPS/GLONASS/Galileo/BeiDou). Heart rate: optical PPG (24/7) + ECG (on-demand AFib detection). SpO2 monitoring. AMOLED touchscreen display. OS compatibility: iOS and Android (dual). Battery: 31 days smartwatch / 31 hours GPS. Water resistance: 5 ATM (50m). Case: 47mm titanium bezel.",
  "sku": "GARMIN-FORERUNNER-965-BLACK",
  "brand": { "@type": "Brand", "name": "Garmin" },
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "name": "GPS",
      "value": "Built-in Multi-Band GPS",
      "description": "Built-in multi-band GPS (standalone — no smartphone required for route tracking). Satellite systems: GPS + GLONASS + Galileo + BeiDou + QZSS (multi-constellation). Multi-band: uses L1 and L5 frequency bands simultaneously for improved accuracy in urban canyons and tree cover (multi-band mode reduces position error from 10m typical single-band to approximately 2–3m). Cold start: approximately 15–25 seconds (A-GPS with downloaded satellite prediction file from Garmin Connect). GPS mode battery: 31 hours (GPS only) / 19 hours (GPS + music + LTE). Route, distance, pace, elevation, and lap splits recorded onboard to watch storage."
    },
    {
      "@type": "PropertyValue",
      "name": "Heart Rate Monitor (PPG)",
      "value": "Optical PPG (Garmin Elevate v4)",
      "description": "Optical photoplethysmography (PPG) heart rate sensor: Garmin Elevate Gen 4. Four LEDs (green + red + infrared) illuminate wrist capillaries; photodetector measures reflected light to calculate heart rate from pulse waveform. Sampling modes: continuous 24/7 HR every 1 second during exercise, every 2 minutes at rest. Provides: resting HR, exercise HR zones (1–5), heart rate variability (HRV) status, stress score (derived from HRV), body battery energy level, and SpO2 pulse oximetry. Accuracy: ±3 bpm in most conditions; accuracy degrades during high-cadence wrist motion. Cannot detect atrial fibrillation reliably (PPG limitation — not FDA-cleared for AFib detection)."
    },
    {
      "@type": "PropertyValue",
      "name": "Heart Rate Monitor (ECG)",
      "value": "Single-Lead ECG (AFib Detection)",
      "description": "Electrocardiogram (ECG) sensor: single-lead, lead I configuration. User places left finger on upper right bezel electrode while wearing watch on left wrist — creates a complete circuit measuring the electrical impulse from the heart. Records a 30-second ECG rhythm strip. Classification: Normal Sinus Rhythm / Atrial Fibrillation / Inconclusive. PDF rhythm strip downloadable and sharable with cardiologist. Not FDA-cleared as a medical device on this model — classified as a wellness feature. Not intended for users with known arrhythmias other than AFib. Does not replace a 12-lead clinical ECG."
    },
    {
      "@type": "PropertyValue",
      "name": "SpO2 Monitoring",
      "value": "Pulse Oximetry (overnight + on-demand)",
      "description": "SpO2 (blood oxygen saturation) monitoring via red and infrared LED PPG sensors. Modes: (1) On-demand: single manual reading while resting (60-second average). (2) Overnight: continuous monitoring during sleep — logs SpO2 readings throughout the night to detect nocturnal oxygen desaturation events associated with sleep apnea. (3) All-day acclimation monitoring: optional during altitude acclimatization (for trekking/climbing use). Normal SpO2 range: 95–100% at sea level. Below 90% is clinically low. Note: consumer PPG-based SpO2 is not FDA-cleared for clinical SpO2 measurement — wrist-based SpO2 has higher error rates than fingertip pulse oximeters. Values are wellness estimates, not diagnostic."
    },
    {
      "@type": "PropertyValue",
      "name": "OS Compatibility",
      "value": "iOS 16+ and Android 8.0+ (dual-compatible)",
      "description": "Compatible with: iPhone running iOS 16.0 or later via Garmin Connect app (App Store); Android phones running Android 8.0 (Oreo) or later via Garmin Connect app (Google Play). Full feature availability on both platforms: route syncing, training plan downloads, GPS course navigation, smart notifications (SMS, email, calendar alerts), Garmin Pay contactless payments, Spotify/Deezer offline music sync, Connect IQ app store, health metrics sync. Platform-specific limitations: Live Track (real-time location sharing during workouts) requires the Garmin Connect app on iOS or Android. Garmin Pay requires a compatible bank card enrolled on either iOS or Android. No WearOS — proprietary Garmin OS with iOS/Android companion app."
    },
    {
      "@type": "PropertyValue",
      "name": "Battery Life",
      "value": "31 days (smartwatch) / 31 hours (GPS mode) / 50 days (battery saver)",
      "description": "Battery capacity: 1050 mAh. Modes: Smartwatch mode (HR, notifications, GPS off, always-on display off): 31 days. Smartwatch mode with always-on display: 11 days. GPS mode (GPS + GLONASS + HR + no music): 31 hours. GPS + Music mode (GPS + HR + onboard music playback via Bluetooth headphones): 10 hours. Max battery GPS mode (reduced GPS sampling, longest GPS life): 110 hours. Battery saver mode (steps, time, basic HR only): 50 days. Charge time (Garmin proprietary cable): 0–100% in 120 minutes. Solar charging variant (Forerunner 965 Solar): adds approximately 5 hours per day GPS / 12 days smartwatch in 50,000 lux full-sun conditions."
    },
    {
      "@type": "PropertyValue",
      "name": "Water Resistance",
      "value": "5 ATM (50 meters)",
      "description": "Water resistant to 5 ATM (50 meters) per ISO 22810:2010. Suitable for: recreational swimming in pools and open water, showering, rain, paddle sports. Not suitable for: recreational scuba diving, high-impact water activities (jet skiing, water polo, surfing with forceful water entry). Pool swimming tracking: built-in pool swim mode tracks laps, stroke type (freestyle/backstroke/breaststroke/butterfly), SWOLF score, active calories, and distance via accelerometer (GPS is not used underwater — pool mode uses wrist motion). Open-water swimming: GPS route tracked in open water (GPS reception is reduced when wrist is submerged — watch should be positioned face-up when above water between strokes)."
    },
    {
      "@type": "PropertyValue",
      "name": "Display",
      "value": "AMOLED touchscreen, 1.4 inches, 454×454 px",
      "description": "Display: 1.4-inch AMOLED (Active Matrix Organic LED) touchscreen. Resolution: 454×454 pixels (324 PPI). AMOLED advantages: deep blacks (per-pixel illumination), high color saturation, energy-efficient when displaying dark backgrounds (dark watch faces save battery vs light faces). Gorilla Glass DX+ lens coating for scratch resistance. Always-on display mode available (reduces battery by approximately 65% vs standard mode). Sunlight visibility: high ambient light mode boosts brightness for outdoor readability; AMOLED is generally less readable in direct sunlight than transflective MIP displays (used on Garmin's Instinct series). Touchscreen + physical button hybrid: 5 side buttons for gloved use, swim use, or single-hand operation."
    },
    {
      "@type": "PropertyValue",
      "name": "Case Size",
      "value": "47mm",
      "description": "Case diameter: 47mm. Case thickness: 13.2mm. Weight: 53g (with silicone band). Case material: fiber-reinforced polymer body with titanium bezel (lighter than stainless steel; titanium bezel reduces total weight vs comparable stainless models by ~15g). Band: 22mm width (standard lug size — compatible with third-party quick-release 22mm bands). Lens: Gorilla Glass DX+. Display area relative to case: 1.4-inch screen in 47mm case yields moderate bezel; compare Forerunner 265 (46mm case, 1.3-inch AMOLED). Wrist size comfort range: the 47mm case is designed for wrist circumference 130–210mm (adjustable silicone band included)."
    },
    {
      "@type": "PropertyValue",
      "name": "Cellular / LTE",
      "value": "No (Bluetooth and Wi-Fi only)",
      "description": "No cellular / LTE radio. Connectivity: Bluetooth 5.2 (for smartphone pairing, headphones, sensors), Wi-Fi 802.11 b/g/n (for automatic syncing when in range of known networks, firmware updates, course downloads). Cannot make or receive calls or messages without paired phone in Bluetooth range. For standalone cellular use, consider Garmin Forerunner 965 LTE variant or Apple Watch with cellular. Wi-Fi is used exclusively for background sync and download — it does not enable standalone music streaming or messaging."
    }
  ]
}
</script>

Liquid Template — Smartwatch Metafields to JSON-LD

{% assign w = product.metafields.wearable %}
{% if w %}
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": {{ product.title | json }},
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "GPS", "value": {{ w.gps_type | json }} },
    { "@type": "PropertyValue", "name": "Heart Rate Monitor (PPG)", "value": {{ w.hrm_ppg | json }} },
    { "@type": "PropertyValue", "name": "Heart Rate Monitor (ECG)", "value": {{ w.hrm_ecg | json }} },
    { "@type": "PropertyValue", "name": "SpO2 Monitoring", "value": {{ w.spo2_monitoring | json }} },
    { "@type": "PropertyValue", "name": "OS Compatibility", "value": {{ w.os_compatibility | json }} },
    { "@type": "PropertyValue", "name": "Battery Life", "value": {{ w.battery_life | json }} },
    { "@type": "PropertyValue", "name": "Water Resistance", "value": {{ w.water_resistance | json }} },
    { "@type": "PropertyValue", "name": "Display", "value": {{ w.display | json }} },
    { "@type": "PropertyValue", "name": "Case Size", "value": {{ w.case_size_mm | json }}, "unitCode": "MMT" },
    { "@type": "PropertyValue", "name": "Cellular / LTE", "value": {{ w.has_lte | json }} }
  ]
}
</script>
{% endif %}

Smartwatch Metafield Reference

Five Common Smartwatch Schema Mistakes

• GPS listed as "Yes" without specifying type. "Has GPS: yes" tells an AI agent nothing about whether the watch tracks routes without a phone. A buyer planning solo trail runs cannot filter on "GPS" alone — they need "built-in GPS" specifically. Encode the GPS type explicitly (built-in / AGPS / cellular) with a description explaining whether a phone is required.
• Heart rate monitoring listed without distinguishing PPG from ECG. "Heart rate monitoring" is too generic to be useful in structured data. Optical PPG (continuous, not medical-grade) and ECG (on-demand, FDA-cleared for AFib on approved devices) are different sensors with different clinical capabilities. A buyer researching AFib detection cannot find ECG-equipped watches if all watches are labeled "heart rate monitoring."
• OS compatibility stated as "iOS and Android" without version minimums. "Supports iOS and Android" is insufficient — an iPhone 6 user running iOS 12 may be incompatible with a watch requiring iOS 16+. Always encode minimum OS version: "iOS 16.0 or later / Android 8.0 (Oreo) or later." Also note any platform where features are reduced (e.g., Samsung Galaxy Watch requires Samsung Galaxy phone for full Samsung Health integration).
• Battery life listed as a single number without mode context. "Battery life: 14 days" is meaningless without specifying the mode. With always-on display enabled, a 14-day watch may last 6 days. With continuous GPS active, it may last 20 hours. Encode at minimum: standard mode (days), GPS mode (hours), and if available, low-power mode (days).
• Water resistance rated in meters without the underlying standard. "Waterproof to 50 meters" and "5 ATM" are equivalent, but "IP68" is not — IP68 devices may only be tested to 1.5m for 30 minutes. Always encode the rating with the standard (ISO 22810 for ATM, IEC 60529 for IP) and explicitly note whether swimming is supported, since many IP68-rated devices explicitly exclude swimming in their warranty terms.

Related guides

• Shopify Electronics & Hardware Schema — general electronics structured data
• Shopify Fitness Equipment Schema — gym and training equipment structured data
• Shopify Medical & Health Device Schema — FDA-cleared device structured data
• E-Commerce Product Schema Markup — complete Product JSON-LD guide