Let me start by saying the AOLON Foom S4 surprised me. That 1.91-inch screen? Crisp, vibrant, and seriously impressive for the price point. I've worn it during morning runs, and even in direct sunlight, I could easily check my stats without squinting.

The design feels premium - that zinc alloy casing has a nice weight to it (but not too heavy at just 28g). The black model looks sleek enough for office wear, yet sporty for workouts. My favorite detail? The rotating encoder button makes navigation way easier than swiping through endless menus.

Battery life is a standout - I got about 6 days with moderate use (notifications on, daily heart rate tracking). Charging is quick too; I'd pop it on the charger during showers and gain enough juice for the day.

Now the health tracking...it's decent but not medical-grade. My heart rate readings were within 5-8 bpm of my doctor's monitor. Sleep tracking seemed to underestimate my deep sleep phases though. The blood oxygen readings? Take them as rough estimates rather than precise measurements.

The GloryFit app integration works smoothly if you stick with basic features. Notifications come through clearly (though some apps aren't supported). Call quality via Bluetooth is surprisingly good - no one realized I was talking through my watch!

A few quirks: The AI voice assistant feels gimmicky, and that 'remote photography' feature is more frustrating than useful. Also be warned - if you unpair from your phone, time sync gets wonky until you reconnect.

For under $50? This punches way above its weight class. It's perfect for teens (my niece adores hers) or as an entry-level smartwatch. Just don't expect Apple Watch precision from the health sensors.