The first sign of a swapped SIM is often a stranger's number on the phone bill — weeks too late. This notification tracker app emails and texts you the moment something changes on your child's device: a new SIM, a flagged word, or a step outside the school zone.
You can't watch a phone all day. These are the four changes worth interrupting your afternoon for — the ones TheOneSpy pushes to you without being asked.
The moment a new SIM goes in, you get an email with the time it happened. A swapped SIM is often the first sign a phone is on a second line.
Add words that worry you — a slang term, a name, a place. When one is typed or received, the alert names the app it appeared in.
Draw a zone around home, school or a friend's house. You get a timestamped alert the moment the device enters or leaves it.
Choose which phone activity alerts reach you. They land by email and SMS, so you know something needs a look without opening the dashboard.
All eight alert types come with every plan. Switch on the ones that fit your child's age and leave the rest quiet.
An email the second a new SIM is detected.
Every alert you enable, sent to your inbox.
A text for time-sensitive events, no app needed.
An alert when a word you flagged is typed or received.
Entry and exit alerts for zones you draw on a map.
Real-time notices for the events you choose to track.
A running feed of alerts across your dashboard.
Decide which triggers alert you and which stay silent.
Pick a plan from $18/month. Setup and install instructions reach your email right away.
You need the device in your hand once. The guided setup takes under 10 minutes — no root, no jailbreak.
Turn on the alerts you want. From then on they arrive by email and SMS, wherever you are.
Android sends the fullest set of alerts. On iPhone, Apple's rules limit some alert types — here is the honest split.
Android 7–16 · No root · Fullest alert set, including SIM change and keyword alerts
Android Monitoring →iOS 13–18 · No jailbreak · Core alerts supported; Apple's limits mean fewer alert types than Android
iPhone Monitoring →What parents ask before turning on alerts with TheOneSpy — including the honest limits on iPhone.
See Plans & Pricing → How parental control works → Browse all monitoring features →It sends alerts for the events you switch on: a SIM change, a flagged keyword, a geo-fence entry or exit, and a summary of the device activity you choose. Alerts arrive by email and SMS. What is available depends on the device and plan — Android supports the fullest set.
Within seconds of the phone connecting to a network with the new SIM. The alert names the time it happened and lands in your email. A swapped SIM is often the first sign a phone is being used on a second line you did not know about.
Yes. Add any words or phrases that worry you — a slang term, a name, a place. When one is typed or received on the device, you get an alert that names the app it appeared in, so you know where to look first.
Yes. Every alert type works on Android without root and on iPhone without jailbreak. You need one-time physical access to install the app; after that, alerts sync on their own. Most parents finish setup in under 10 minutes.
Yes. TheOneSpy is built for transparent parental oversight, not for watching someone without their knowledge. Telling your child that alerts are on sets a clear boundary and keeps the conversation open. Many parents describe it as scaffolding, not a cage.
No. Android sends the fullest set of alerts, including SIM change and keyword alerts. On iPhone, Apple restrictions limit what any app can see, so fewer alert types are available. If alerts are your main goal, an Android phone gives you the most complete view.
Join parents in 190+ countries who use TheOneSpy to stay informed. Fullest alerts on Android, core alerts on iPhone. Plans from $18/month, with a 14-day money-back guarantee.
14-day money-back guarantee · No long-term contract · Cancel anytime
