Owlet alternative: what a camera app can and cannot replace

Before anything else: MonitorUltra does not measure oxygen saturation, pulse rate, breathing, or any other physiological signal. It has no wearable, no sensor, and no contact with your child. It makes no claim of any kind about SIDS. If you are searching for an Owlet alternative because you want a device that reads vitals from your baby's body, this app does not do that job and nothing below will change that. You will save yourself time by stopping here and comparing wearables instead.

The rest of this page is for a narrower group of people. Plenty of parents end up looking at Owlet because they want to see and hear their child from another room, and the sock came bundled with a camera. If the camera was the part you actually used, there is a much cheaper way to get it.

The short answer

Owlet sells a wearable that reads pulse and oxygen levels from a baby's foot, usually alongside a nursery camera. MonitorUltra replaces only the camera half. It turns two iPhones into a video and audio monitor with on-device cry detection, for a subscription rather than a device purchase. It provides no vitals tracking of any kind and is not a medical device.

What the sock does that no camera can

A camera sees the outside of a sleeping child. A pulse-oximetry wearable reads something from the body itself. Those are different categories of information, and no amount of image processing bridges the gap. Any product claiming to derive reliable oxygen saturation from a phone camera pointed at a cot should be treated with suspicion.

This is also the reason I will not pitch MonitorUltra as a replacement for a health wearable. It would be a lie, and it would be the kind of lie that matters at three in the morning when someone is deciding whether to check on their child.

If a clinician has advised monitoring for a specific medical reason, follow that advice and buy what they recommend. That situation is outside what any consumer camera app is for.

Who should stop reading

Stop here if any of these apply:

• You want oxygen or heart-rate readings and alerts based on them.
• Your child has a diagnosed condition that someone has asked you to monitor.
• Sleep-quality analytics from a wearable are the feature you would miss.
• You need Android support. MonitorUltra runs on iOS only, on both ends.

None of that is a criticism of what you want. It falls outside what this app does.

If the camera was the part you used

Some households buy the bundle, use the sock for a few weeks, find it stressful or fiddly, and quietly settle into using the camera alone. If that describes you, the economics change completely, because you are no longer paying for a sensor you have stopped wearing.

You need two compatible Apple devices: one baby unit and one parent unit. Use an undamaged iPhone or iPad running iOS or iPadOS 17 or later, with a working screen, camera and microphone. Check the device and charger before use. A SIM is unnecessary when the device has working Wi-Fi.

MonitorUltra goes on both. The baby unit shows a QR code, the parent unit scans it, and that is the whole pairing process. There is no router configuration and no account to create on the camera device.

What you get

• Live video and audio from the nursery, encrypted in transit and relayed live to your phone.
• Cry detection that runs on the baby unit itself, using Apple's SoundAnalysis framework. Audio is classified on the device and is not uploaded for a server to analyse.
• Camera-based motion alerts, which you can turn off when a fan or a curtain keeps triggering them.
• No recording. There is no clip history and nothing stored on a server, so there is no footage of your nursery sitting in someone else's database.
• Reach beyond the house. The stream works over Wi-Fi and over cellular, so the parent unit can be in the garden or across town.
• Several parent devices at once, each receiving its own alerts.

New installations of MonitorUltra require an active subscription to start monitoring, including audio. Any introductory trial depends on the selected App Store offer and eligibility. Existing installations with legacy audio access retain that access; it is not an offer for new users.

The subscription and trial guide explains current access and cancellation.

What you give up

Being even-handed about this matters more than the sales pitch.

• All vitals data. Said again because it is the whole point of the comparison.
• A purpose-built device. A dedicated monitor cannot receive a phone call or run out of storage. An old iPad in a stand gets close, and it is still a general-purpose computer.
• Cross-platform support. iOS on both ends, with no Android app and no web viewer.
• A camera that is already mounted. You will need a stand or a clamp, and a socket positioned so the cable stays at least a metre from the cot.

For a fuller version of that argument, including where dedicated hardware genuinely wins, see baby monitor app vs dedicated monitor. If the product you were actually comparing tracks breathing through a camera rather than a sock, the Nanit comparison is the closer match.

On safe sleep

Standard guidance from national health bodies is that safe sleep comes from the sleep environment: a firm flat mattress, the baby on their back, nothing loose in the cot, and cords kept at least a metre away. No monitor of any kind, wearable or camera, changes those recommendations, and no monitor substitutes for an adult in the house. Treat any monitoring product as a convenience for hearing your child sooner, and keep the rest of your setup exactly as it should be.

Frequently asked questions

Does MonitorUltra track oxygen or heart rate? No. It has no wearable and no sensor of any kind. It is a camera and microphone app.

Can it detect breathing from the camera? No. Motion detection registers movement in the frame. It is not a breathing monitor and should never be used as one.

Is it cheaper than an Owlet setup? It costs $7.99 a month or $49.99 a year, with no hardware to buy if you already own two compatible iPhones. Compared with a wearable plus camera bundle the running cost is lower, though you are buying a different and smaller set of functions.

What iPhones work? Use an undamaged iPhone or iPad running iOS or iPadOS 17 or later, with a working screen, camera and microphone. Check the device and charger before use. A SIM is unnecessary when the device has working Wi-Fi.

Can my partner watch too? Yes. Several parent devices can watch the same baby unit at once, and each gets its own alerts.