How to View Your O2Ring on Two Phones (and Watch It From Another Room)

It is one of the most common questions O2Ring owners ask: "Can I just open the app on two phones so my husband and I can both watch the readings?" Or: "My mom wears the ring at night, can I see it on my phone from my room down the hall?" It sounds like it should be simple. It usually is not, and the reason has nothing to do with you doing anything wrong.

The short answer: a single O2Ring (and the rest of the Wellue / Viatom / Checkme family) talks to exactly one phone at a time over Bluetooth. You cannot just install ViHealth on a second phone and have both screens light up. Below is the honest explanation of why, and then the way people actually get the live SpO2 and pulse onto a second person's phone, in another room or another city.

Why you can't open the ring on two phones at once

This is a hardware limit, not an app setting you missed. Bluetooth Low Energy, the radio the ring uses, holds one active data connection at a time for this kind of device. Wellue says it plainly in their own O2Ring FAQ: "The O2Ring can only connect to one device at a time." Their troubleshooting advice when the app can't find the ring is also revealing, it's usually because "the ring is still connected to another device," and the fix is to turn off Bluetooth on the other phone and force-close the app there before the second phone can grab it.

So if you and a family member both try to connect, one of two things happens:

• Whichever phone connected first keeps the ring, and the second phone simply can't find it.
• The connection ping-pongs, dropping off one phone as the other grabs it, so neither of you gets a stable, continuous stream.

Wellue even warns you not to pair the ring in your phone's system Bluetooth settings at all, the connection is meant to be made inside the app, once, on one device. None of that is a bug. It's just how the radio works.

What ViHealth offers, and where it falls short

Wellue's own answer to remote viewing is a separate piece of hardware, the Remote Linker (sometimes sold as a Wi-Fi stick / remote kit). You plug it in near the wearer, it stays paired to the ring locally, and it relays the readings to the cloud so a family member can see real-time numbers in ViHealth. It's a real option, but it comes with real friction:

• It's an extra accessory you have to buy and keep powered and connected next to the wearer.
• The family member has to keep the ViHealth app open to keep receiving updates.
• And ViHealth itself has a rough reputation lately. Owners on sleep-apnea forums and the App Store report whole nights of data vanishing after app updates, sessions getting split in half, the stream stopping the moment the app goes to the background or a phone call comes in, and support that often doesn't reply.

If you've landed on this guide frustrated, that mix is probably why. The good news is the underlying idea, one device stays paired locally and relays the readings to others, is exactly the right model. It just doesn't have to depend on a finicky accessory.

How remote viewing actually works (the relay model)

Once you accept that the ring only bonds to one phone, the solution becomes obvious. You don't try to connect two phones to the ring. You connect one phone to the ring, and let that phone relay the live numbers to everyone else over the internet. Conceptually:

• One phone stays with the wearer, paired to the O2Ring over Bluetooth the normal way. Call it the "sender." It's the only device that ever talks to the ring.
• That sender phone forwards the live SpO2 and pulse, second by second, up to the cloud.
• Any number of "viewer" phones, yours in the next room, a sibling's in another city, pull that live feed down and show the same numbers, with a short delay of a few seconds.
• If the reading drops below a threshold you set, the viewer phones get a low-oxygen alert, even if nobody is staring at the screen.

This is the model a dedicated remote-view app like OxyRemote uses. The wearer's phone stays paired to the ring; your phone becomes a live second viewer over the internet, no extra hardware to buy. It works with the Wellue / O2Ring family, Viatom, Checkme, and the Oxyfit PO6. Two honest caveats worth stating up front: the sender phone has to stay near the wearer and stay running (that's the Bluetooth-range limit, roughly within the same room), and a remote viewer shows readings going forward, it can't recover data ViHealth already lost. For more on picking the right tool, see choosing a remote pulse oximeter app.

Setting it up, conceptually

You don't need to be technical. The flow is the same idea regardless of which remote-view app you use:

• On the phone that stays with the wearer, pair the O2Ring the normal way (in the app, not in system Bluetooth settings). This phone keeps the local Bluetooth link.
• Turn on sharing / remote viewing so that phone starts relaying the live feed. You'll get a code or link to share.
• On the viewer phone(s), join with that code. The same live SpO2 and pulse now show up on your screen.
• Set a low-oxygen alert threshold so you get notified if the number falls, rather than having to watch constantly.
• Leave the wearer's phone plugged in and within a few feet of the ring overnight so the Bluetooth link doesn't drop.

On thresholds: it's tempting to copy a number off the internet, but a safe range varies from person to person, especially for people with COPD or other lung conditions. Pick alert levels with input from the wearer's healthcare provider rather than guessing. Our overnight oxygen monitoring at home guide walks through this in more detail.

Who this is for

The relay model fits the situations people actually describe when they search for this:

• Another room: an older parent or a child wears the ring in their bedroom; you sleep down the hall and want a glance-able screen plus an alert if oxygen dips overnight. See monitoring an elderly parent's oxygen remotely.
• Another city: an adult child wants to keep an eye on a parent who lives alone, without driving over every night. The wearer's phone relays; yours views from anywhere with internet.
• Two caregivers, one wearer: a couple sharing care duties can both view the same live feed at once, something two Bluetooth connections to the ring could never do.
• Sleep-related concerns: if you're tracking dips at night, our guides on SpO2 drops during sleep and pulse oximeters for sleep apnea cover what the patterns can mean.

One last reframe. Trying to force two phones onto one ring is the wrong question, the Bluetooth radio will never allow it. The right question is "how do I get the live readings onto a second person's screen," and the answer is a relay: one phone paired locally, everyone else viewing over the internet. That's how a remote-view app such as OxyRemote turns a single ring into something a whole family, or a caregiver in another city, can keep an eye on, with a low-oxygen alert when it matters. As always, the numbers are for awareness, not diagnosis, so loop in the wearer's healthcare provider for anything that concerns you.