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Apple Watch Series 10 Smart Watch ($329, originally $399)

If he's got an iPhone, the Apple Watch Series 10 Smart Watch is the perfect accessory. Not only does this upgraded version boast a water resistance up to 50 meters, but it also has the most crack-resistant front screen of models to-date. The Series 10 has advanced health and wellness features including temperature sensing, blood oxygen level tracking, and ECG monitoring (it'll even send notifications if you have an irregular rhythm).

Plus, it can help with sleep analysis, including how much time you spent in REM, core, and deep sleep. And, of course, you can still do all the cool things the previous models can do, like track a wide range of workouts, use widgets on the watch face, utilize multiple timers, and make contactless payments. Read our in-depth review of the Apple Watch.