Want a screenless fitness tracker blood oxygen feature you can actually rely on day to day, without a display to check it on? Two REXQU models track SpO₂ continuously in the background: the GuardBand and the PulseBand. They take slightly different approaches to what else comes bundled alongside that blood-oxygen reading.
Quick answer: both the REXQU GuardBand and REXQU PulseBand include 24/7 blood oxygen tracking without a screen. GuardBand pairs it with GPS, SOS and fall detection for safety-focused use; PulseBand pairs it with a wider set of wellness metrics, including ECG and body composition.
This article is for general wellness information only and isn’t medical advice. Talk to a healthcare provider about any health concern, and don’t rely on a screenless fitness tracker for clinical decisions.
How a Screenless Fitness Tracker Tracks Blood Oxygen Without a Display
A screenless fitness tracker still has the same optical sensors as a screen-based smartwatch — it just skips the display and reports results through a companion app instead. For blood oxygen, that means a light-based (PPG) sensor on the underside of the band estimates SpO₂ periodically through the day and overnight, then syncs the readings to your phone.
The screenless design has one practical advantage here: you’re not tempted to constantly wake a screen to check a number that changes slowly, and the band stays slimmer and lighter without a display stack to power.
REXQU GuardBand: 24/7 SpO₂ Alongside GPS and Fall Detection
The REXQU GuardBand bundles 24/7 heart rate, HRV, SpO₂ and blood pressure tracking with GPS, SOS emergency calling and fall detection — a combination built more for safety monitoring than for a wide wellness dashboard. It runs 7–10 days on a charge and sells for $139.97.
If blood oxygen tracking is one piece of a broader “can someone check on me if something goes wrong” setup, GuardBand’s GPS and SOS features are the differentiator over a tracker that only reports SpO₂ on its own.
REXQU PulseBand: Blood Oxygen as Part of a Broader Wellness Picture
The REXQU PulseBand takes a different angle on the same screenless fitness tracker blood oxygen feature. It adds 24-hour ECG, heart rate, HRV, blood pressure, body temperature, sleep, stress and body composition tracking, plus 32 risk assessments, multi-sport modes, women’s health tracking, and sedentary and medication reminders. It’s also $139.97.
PulseBand is the better fit if you want blood oxygen folded into a much wider set of daily wellness metrics rather than paired mainly with safety features.
What Can Affect Blood Oxygen Readings on a Screenless Tracker
Wrist-worn optical SpO₂ sensors are generally more accurate when you’re still and well-perfused than during motion or in cold conditions, which reduce blood flow at the wrist. A peer-reviewed study on wrist pulse oximetry accuracy found that even a well-performing wrist device met accuracy thresholds mainly under no-motion, high-perfusion conditions — and that a meaningful share of readings fell outside the expected range, especially at lower oxygen levels. That’s a general finding about wrist pulse oximetry, not a claim about any specific REXQU model, but it’s a useful reminder to treat any single screenless fitness tracker blood oxygen reading as a trend indicator rather than a one-off diagnostic number.
FAQ: Screenless Fitness Tracker Blood Oxygen Tracking
Do I need a screen to get accurate SpO₂ readings? No — the sensor hardware, not the display, determines reading quality. Both GuardBand and PulseBand take the SpO₂ measurement the same way; the screen (or lack of one) only changes how you view the result.
Which REXQU screenless tracker should I pick for blood oxygen alone? If SpO₂ is your main interest alongside basic safety features, GuardBand’s GPS and SOS make it the more focused option. If you want blood oxygen as one metric among many, PulseBand’s broader wellness set is the better fit.
See the full REXQU GuardBand and REXQU PulseBand product pages for current specs and pricing, or browse the rest of REXQU’s screenless fitness tracker lineup.