What Who's on My WiFi does
- Keeps a roster of known devices on each network you watch: IP address, manufacturer, first seen, last seen, and a name you choose.
- Rescans in the background and flags anything new with a NEW badge until you acknowledge it.
- Sends a new-device alert when an unfamiliar device joins, and can also tell you when a known device goes offline if you turn that on per device.
- Lets you trust, rename and reset so the list reflects your home, office or rental.
When to use it
- You want to know who is connected to your wifi, and how many devices are on it.
- You spotted an unknown device on your network and want to know whether it is yours.
- You share a house, office or short-term rental and want a heads-up when something new joins.
- You want to see whether a smart-home gadget or a TV is actually online.
Platform availability and limits
| Platform | Availability | Notes |
|---|---|---|
| macOS | Yes | Rescans every few minutes while the Mac is awake (interval is configurable). Uses NetJolt's optional scan helper, which needs a one-time approval in System Settings. |
| iOS / iPadOS | Coming soon | Scans when the app is in front and during background windows iOS grants. iOS decides how often those happen, so alerts are not instant. |
| Android | Coming soon | Background check roughly every 15 minutes on Wi-Fi when the battery is not low, plus an opt-in continuous-watch mode that checks about every 5 minutes. |
Why some devices get no alert
NetJolt identifies a device by its hardware (MAC) address. Modern iOS and Android 10 and later hide those addresses from apps, so on those platforms some devices can only be matched by a weaker IP-and-name guess. Those devices still appear in the roster but are never used for new-device alerts, to avoid false alarms.
Phones that use a private or randomised wifi address can also show up as a "new" device after the setting changes. Compare the name and manufacturer before assuming the worst.
Frequently asked questions
How do I see who is connected to my wifi?
Your router's admin page lists connected devices, but it is often hard to find and hard to read. NetJolt scans your local network and lists every device it can see with its IP address, manufacturer and when it was first and last seen, with no router login needed.
What is an unknown device on my network?
Often it is one of your own devices under a name you do not recognise: a TV, printer, smart plug or a phone using a private (randomised) wifi address. NetJolt lets you give each device a name and mark it as trusted so that what is left over stands out.
Will NetJolt tell me when a new device joins my wifi?
Yes. When a device it has not seen before appears on a network you are watching, NetJolt sends a notification, and you can optionally be told when a known device goes offline. How quickly depends on the platform, see below.
Can NetJolt block a device or see what it does online?
No. NetJolt shows which devices are present on your network. It does not block devices, change router settings or inspect what a device is doing.
More diagnostic tools: all NetJolt docs · Captive portal detective · NetJolt overview and downloads