List of decoy apps for android?

Decoy apps — the calculator that opens a vault, the "notes" app hiding photos — exist to conceal content from whoever picks up the phone. A shopping list for installing one on someone else's device is not something I will write: that is unauthorised access, and the same apps are a standard malware delivery route.

What is useful instead: recognising them. The common ones are calculator and vault clones (Calculator+, Keep Safe, Vaulty, Gallery Lock), "private browser" apps, and dual-app or parallel-space tools that clone WhatsApp or Snapchat into a second, hidden instance. If you find one on a child's phone, the vault usually opens with a PIN you will not have — which tells you the conversation needs to happen in person, not through an app.

How to check without installing anything. Play Protect → scan. Settings → Apps → sort by install date to spot anything added recently. Check for a second user profile or Secure Folder, where a parallel WhatsApp usually lives. Android's Digital Wellbeing shows which apps were used and for how long, even ones with no visible icon.

Where our app fits. Ultimate Phone Spy runs on Android 4.0+, Windows and macOS and reports installed apps and new installs to the dashboard (features). It is installed openly, with the child's knowledge — that is the point. A tool the child does not know about is exactly what decoy apps are built to defeat, and it turns a parenting problem into a legal one.