How do I choose between the 41mm and 45mm Pixel Watch 4 sizes?

Both sizes offer identical breakthrough features including satellite SOS, user-serviceable design, and Gemini AI coaching. The 45mm provides larger display and superior battery life (40 hours vs 30 hours), fitting wrists 150-215mm circumference. The 41mm offers classic, lighter profile fitting wrists 130-210mm circumference. Choice depends on display preference, battery needs, and wrist fit.

What breakthrough features does Pixel Watch 4 offer that competitors cannot match?

Four revolutionary capabilities no competitor offers: (1) Satellite SOS emergency communication enabling distress signals without cellular coverage, (2) User-serviceable design with replaceable battery and display components, (3) Actua 360 domed display with 3000 nits brightness, (4) Gemini AI personal health coach with 24/7 guidance and raise-to-talk activation.

Which phones are compatible with the Pixel Watch 4?

Compatible with Google Pixel and Android phones running Android 11.0 or newer. Optimal experience achieved with Pixel phones for exclusive satellite emergency communication, Gemini AI integration, and camera remote control capabilities. Google Account required for full feature access.

How does the satellite SOS emergency communication work?

Industry-first capability enabling distress signals and emergency service communication in remote locations without cellular or Wi-Fi coverage. Uses advanced satellite network technology with 2-year free service included and global coverage. Functions in areas where no other smartwatch can operate.

Is the Pixel Watch 4 water resistant?

Yes, features comprehensive water resistance with 50 meters (5 ATM) depth capability and IP68 protection. Supports ocean swimming, pool activities, showering, water sports, and complete submersion protection with Water Lock Mode for automatic water ejection.

How does the revolutionary repairability design work?

First user-serviceable Pixel Watch with replaceable battery and display components. Enables cost-effective maintenance at fraction of full device cost, supporting 5+ year usage with component replacement. User-accessible battery replacement takes 15-30 minutes with official kits. Display replacement available through professional service network.

What advanced health features are available on Pixel Watch 4?

Breakthrough Loss of Pulse Detection (FDA-cleared), Gemini AI health coach with 24/7 guidance, 18% more accurate sleep tracking, multi-path heart rate sensor, skin temperature monitoring, ECG readings, and continuous SpO2 monitoring. Includes 6-month Fitbit Premium trial for advanced analytics.

Do I need a phone to use the Pixel Watch 4?

Initial pairing requires compatible Android phone. LTE model enables independent operation for calls, texts, music, Google Pay, and Gemini Assistant. Bluetooth/Wi-Fi model requires phone proximity or Wi-Fi connection. Both models include satellite SOS emergency communication operating independently.

Baby Daybook - Newborn Tracker

Name: Google Pixel Watch 4
Brand: Google
Availability: PreOrder
Rating: 4.8 (1250 reviews)

Baby Daybook is trusted by 2 million+ parents with a 4.8★ rating, tracking feedings, sleep, diapers, and growth with quick WearOS widget access for busy hands.

Best for: Newborn care tracking, feeding logs, sleep schedules, family sync

Download: Play Store | Phone: Phone required for setup | Offline: Partial (cached logs) | Battery: Low

WearOS Features

Track baby care directly from your wrist when your hands are full.

Quick Widgets: Access feeding, sleep, and diaper tracking with WearOS widgets and tiles.
Instant Logging: Tap to log activities without pulling out your phone.
Family Sync: Real-time sync keeps all caregivers updated automatically.
Schedule View: See baby's schedule at a glance on your watch.

Parenting Essential

Perfect for logging feedings while holding your baby or carrying groceries.

Compatibility

Detail	Value
Developer	Baltapis
Rating	4.8★ (66.8K reviews)
Downloads	1 million+
Price	Free (IAP £1.99-£63.99)
Category	Parenting
App Size	~25 MB
Content Rating	PEGI 3
Last Updated	Dec 2025
Requires	`WearOS`

Getting Started

Install Baby Daybook on your phone and WearOS watch from the Play Store.
Create your baby's profile with birth date and details.
Set up WearOS widgets for quick access to tracking.
Start logging feedings, sleep, and diaper changes.
Invite family members for shared tracking and coordination.
Review daily statistics and growth patterns over time.

Tracking Features

Complete baby care tracking for new parents.

Sleep Tracking: Real-time personalized sleep schedules with expert-backed recommendations.
Feeding Log: Track breastfeeding with side timers, pumping, bottle feeding, and solids.
Diaper Tracking: Record wet, dirty, and mixed diapers to identify health patterns.
Growth Charts: Compare height and weight to CDC and WHO standards.

Family Coordination

Invite your partner and caregivers so everyone stays updated on baby's schedule.

Why Baby Daybook on WearOS

Trusted by Millions: Over 2 million parents with exceptional 4.8★ rating.
Hands-Free Logging: Track when holding your baby with quick watch taps.
Complete Tracking: Feedings, sleep, diapers, growth, health, and milestones.
Data Export: Share comprehensive reports with your pediatrician.

WearOS Features​

Parenting Essential

Compatibility​

Getting Started​

Tracking Features​