Looking for a waterproof ECG smartwatch you can trust in the rain, in the shower, or mid-workout — not just on the spec sheet? Here’s the honest answer: most ECG-capable smartwatches, REXQU’s lineup included, are rated for rain, sweat, and hand-washing, but very few are actually built for showering or swimming, no matter how “waterproof” the marketing sounds. The rating on the box matters more than the word itself.
What “Waterproof” Actually Means on a Waterproof ECG Smartwatch
Every REXQU watch carries an IP (Ingress Protection) rating — a two-digit code that separates dust resistance from water resistance. The water digit is what matters here: IP67 means the watch can handle brief, shallow water contact (think a sudden downpour or an accidental dunk to about a meter for 30 minutes), while IP68 goes a step further with sustained, deeper submersion. Neither number is a swimming certification, and manufacturers are usually explicit that daily splash-proofing is not the same as being pool- or shower-safe.
That distinction is exactly where a lot of buyers get tripped up. A watch can be genuinely water-resistant for everyday life — rain on the walk to work, sweat during a run, washing your hands — while its own product page still tells you to take it off before a shower or a swim. Soap, shampoo, and chlorinated or heavily pressurized water stress the seals in ways plain rain and sweat don’t.
REXQU’s ECG Watches, Water Rating by Model
Here’s what REXQU states for each ECG-capable model’s water rating, straight from each product’s own specifications:
| Model | Water Rating | Rain / Sweat / Hand-washing | Shower | Swimming |
|---|---|---|---|---|
| CardioSense | IP67 | Yes | Not rated for it | Not rated for it |
| HealthLink | IP68 | Yes | Not rated for it | Not rated for it |
| IntelliFit | IP68 | Yes | Not rated for it | Not rated for it |
| O2Max | IP67 | Yes | Not rated for it | Not rated for it |
| CardioCall | IP67 | Yes | Not rated for it | Explicitly no |
| Infinity Pro | IP67 | Yes | Explicitly no | Explicitly no |
| Chronex | Water-resistant (rain/sweat) | Yes | Not stated | Explicitly no |
| HealthWave | Not water-rated | Take off before washing up | No | No |
The pattern holds across almost the entire lineup: a waterproof ECG smartwatch here means confident protection from rain, sweat, and hand-washing, plus everyday knocks. HealthWave is the one outlier worth flagging — REXQU states it isn’t water-rated at all, so it should come off before you wash up, unlike the rest of the collection.
Choosing the Right Model for Your Routine
If your day involves rain, gym sweat, or frequent hand-washing, any IP67 or IP68 model on this list covers you without a second thought. Runners and cyclists caught in a downpour, or anyone who washes dishes without remembering to take a watch off, are squarely within what these ratings are designed for.
If you swim laps or take long showers with your watch on, none of REXQU’s current ECG models are the right fit — set the watch aside for those activities instead, even on IP68 models like HealthLink or IntelliFit, since REXQU’s own guidance stops short of endorsing swimming or showering with any of them.
Waterproof ECG Smartwatch FAQ
Can I shower with an ECG smartwatch? REXQU doesn’t recommend it for any current model — soap and hot water are harder on seals than plain rain or sweat, so it’s safest to take the watch off first.
What’s the difference between IP67 and IP68? Both cover dust and water, but IP68 allows deeper and longer submersion than IP67 — neither is a substitute for a dedicated dive or swim watch rating.
Does a higher IP rating mean I can swim with it? Not automatically. IP68 models like HealthLink and IntelliFit still aren’t positioned by REXQU as swim watches, since chlorine, pressure, and prolonged submersion behave differently than a lab water test.
Bottom Line
A waterproof ECG smartwatch from REXQU will shrug off rain, sweat, and hand-washing without any drama — that’s true for every current model except HealthWave. But treat “IP67” and “IP68” as everyday-life protection, not a green light for the pool or a long shower. Browse REXQU’s full ECG smartwatch collection to compare ratings, displays, and price before you buy.
This article is informational and reflects product specifications published by REXQU; it is not medical advice. REXQU smartwatches are wellness devices, not diagnostic medical devices — always consult a qualified healthcare provider about heart rhythm concerns or symptoms.