Nanit Pro vs eufy E21

Buy the Nanit Pro if you genuinely want to check on your baby from somewhere other than your home — a restaurant, an office, a grandparent's house — and you will use the sleep tracking. Buy the eufy E21 if what you actually want is a good picture on a dedicated screen in your own house, with an app you can switch on later if you change your mind. The eufy is the better default for most families, because most families think they want remote viewing and then use the screen. The honest third answer is below: if privacy is the deciding factor, neither is the right buy.

Per how we pick, this is a comparison of published capabilities and connection models, not a signal-strength test. We have not measured range in a particular house, because that number is about your walls rather than the product. What we can do is be precise about what each design means for you, which is the part the box copy obscures.

Side by side

The subscription is a real cost, not a footnote

The Nanit Pro's distinguishing feature is its sleep insights, and its premium features sit behind a paid plan. That is not a hidden fee — Nanit is open about it — but it changes the comparison, because you are not comparing two hardware prices. You are comparing one hardware price against another hardware price plus an ongoing subscription for as long as you want the thing you bought it for.

Our view: the sleep tracking is genuinely well executed and genuinely useful to a specific parent — the one who wants data on whether last night was actually worse or just felt worse. If you are not that parent, you are paying a subscription for a camera. The eufy has no mandatory cloud at all, and that difference compounds over a couple of years.

What “local by default” actually buys you

The eufy E21 runs on a private connection to its own screen out of the box, with the app as something you can add. Three practical consequences, in order of how often they matter.

• It works when your internet does not.A router reboot, an outage, a patchy rental WiFi — the local screen is unaffected. A cloud camera in those moments is a dark rectangle.
• Nobody has to hold the phone.A dedicated screen can sit on a kitchen counter where both parents see it. A phone app means someone's phone is the monitor, with everything else that phone does competing for it.
• The attack surface is smaller when the app is off.A camera not exposed to the internet cannot be reached from the internet. That is not a reason to be smug — the moment you enable the eufy's app, you have a connected camera and the same hygiene applies.

Which brings up the honest third option. If privacy is the thing you care most about, the right answer is neither of these: it is a monitor with no internet capability at all. The Infant Optics DXR-8 PRO is our top no-WiFi pick for exactly that reason — it cannot be reached remotely because it has no remote to be reached from — and it gives you a 5-inch HD screen with interchangeable lenses. What you lose is any ability to check in from outside the house. Our WiFi vs non-WiFi baby monitors guide sets out that trade in full, and Infant Optics vs eufy compares the two screen-based options directly.

If you are set on a smart monitor, read this first

A connected camera in a bedroom deserves the same care as any other internet-facing device in your house. The non-negotiables are short: a unique password you do not use anywhere else, two-factor authentication if the app offers it, firmware updates applied rather than dismissed, and the camera positioned so it sees the crib and not the whole room. None of that is specific to Nanit; it applies to every WiFi monitor including the eufy once its app is on.

If connectivity is already the problem you are having rather than the one you are anticipating, our baby monitor connectivity troubleshooting guide covers the usual causes, most of which are router placement rather than the camera.

Our recommendation, in one line each

Nanit Pro if you will leave the house and want to look in, or you want sleep data and will pay the subscription for it. eufy E21 if you want a sharp picture on a screen that keeps working when the WiFi does not, with the option to add the app later. Infant Optics DXR-8 PRO if the internet is the part you want nothing to do with. All three are in our best baby monitors roundup, and if you are leaning cloud, Nanit vs Owlet and Nanit Pro vs Miku Pro cover the other two smart monitors worth considering before you commit to a subscription.