Foom S4 1.91in Large Screen Smart Watch - Clear Display, Lightweight

In this review the AOLON Foom S4 is presented as a versatile fitness-first smart watch for users who want a large, clear display and lightweight daily wearability. The single biggest reason to buy is the 1.91in high-definition screen, which makes notifications, workout stats and health readings easy to read at a glance without needing a larger, heavier device. The review covers setup, daily use and fitness tracking so shoppers can decide if this is the right smartwatch for their phone and routine.

Key Features

• 1.91in high-definition screen: The large, narrow-edge display improves readability for notifications, workout data and health metrics while keeping a compact silhouette.
• Lightweight zinc alloy body: Crafted from zinc alloy and ABS & PC, the watch weighs about 28g, which reduces wrist fatigue for all-day wear and during workouts.
• Intuitive controls: Two physical buttons including an upper key with encoder allow rotary and click operations that simplify access to utilities like flashlight and calculator.
• Comprehensive health tracking: Built-in heart rate, blood oxygen and sleep monitoring deliver continuous health data for fitness and recovery planning.
• Wide sport mode selection: Over 100 sports modes cater to varied activities so users can track specific workouts from running to niche sports.
• Cross-platform compatibility: Bluetooth 5.2 and broad support for Android and iOS ensure notifications and data sync reliably with popular smartphones.

Who It's For

The Foom S4 is ideal for users who prioritize a large, easy-to-read display without the bulk of oversized smart watches, including commuters, fitness enthusiasts who want many sport modes, and anyone who values lightweight, stylish wear. Its array of health monitors and continuous heart rate tracking make it a practical daily wellness companion.

People who need advanced smartwatch apps, built-in GPS for precise outdoor tracking, or enterprise-level security features should look elsewhere, since this model emphasizes screen clarity, basic utilities and broad compatibility rather than advanced app ecosystems or standalone cellular use.

Pros & Cons

Pros

• Large 1.91in HD screen that makes reading notifications and metrics effortless.
• Very light weight at around 28g for comfortable all-day wear.
• Physical encoder button provides tactile navigation alongside touchscreen input.
• Comprehensive health sensors including heart rate and blood oxygen monitoring.

Cons

• Does not advertise built-in GPS, so outdoor distance tracking likely depends on a connected phone.
• Feature set focuses on utilities and health monitoring rather than an extensive third-party app library.

Specifications

Screen	1.91in high-definition large screen
Body Materials	Zinc alloy, ABS & PC
Weight	About 28g
Sensors	Heart rate, blood oxygen, sleep monitor
Connectivity	Bluetooth 5.2
Water Resistance	IP67 waterproof
Compatibility	Android & iOS phones

Our Verdict

The AOLON Foom S4 is a solid choice for buyers who want a clear, large display and lightweight design combined with reliable health tracking and wide smartphone compatibility. It offers strong value for everyday fitness tracking and notification management, especially for users who prefer a simple, tactile control method over a complex app ecosystem.

Frequently Asked Questions

Does it work with both Android and iPhone?
Yes. The Foom S4 is designed to be compatible with Android and iOS devices via Bluetooth 5.2 for notifications and data sync.

Is the watch waterproof for swimming?
The watch has an IP67 rating which protects against dust and immersion to a limited depth, but it is not specified as swimproof for extended underwater use.

Can I track multiple sports and workouts?
Yes. The watch supports 100+ sports modes to track a wide range of activities and exercise types.