I've been wearing the VPSTAY Fitness Tracker for two weeks now, and it's become my wrist-bound personal assistant. The 1.69" screen is surprisingly crisp when checking my morning heart rate (which spiked when I saw my step count after a lazy Sunday).
The sleep tracking gave me an existential crisis when it revealed I average only 1.5 hours of deep sleep - though I'm still skeptical about its accuracy when it claimed I was 'awake' during my Netflix coma.
Battery life is its superpower - lasting through my workweek plus gym sessions without begging for a charge. The silicone band survived my intense Zumba class (the watch counted 1,287 'steps' during the routine - not sure if that's accurate or flattering).
Getting German instead of English initially was confusing (danke for the unexpected language lesson), but once set up, getting text notifications has been handy - though seeing but not responding to messages feels like watching food commercials while dieting.
For $40, it's a solid basic tracker that makes me feel health-conscious even when I'm just pacing during phone calls. Just don't expect medical-grade precision from something that also reminds me to drink water (while judging my step count).