No, the Magnifier app is not a hidden app on the iPhone. It is a built-in accessibility feature that allows users to utilize the device's camera to magnify objects or text. The Magnifier app can be easily accessed by following these steps:
1. Open the Settings app on your iPhone.
2. Scroll down and tap on "Accessibility."
3. Tap on "Magnifier."
4. Toggle the Magnifier switch to the "On" position.
Once enabled, you can access the Magnifier app by triple-clicking the side or home button (depending on your iPhone model) or by adding it to your Control Center for quick access.
Please note that the availability of the Magnifier app may vary depending on the iPhone model and the version of iOS you have installed.