Here’s my take on this.
Invisible screen recorders can be quite effective for certain applications. Their main advantage is capturing activity exactly as it appears on the screen, which is useful for apps with disappearing messages like Snapchat. They typically work as part of a larger monitoring suite that runs in the background. When the user opens a targeted app like WhatsApp, the recorder activates and captures the screen activity, then uploads the recording to a dashboard.
On the other hand, there are practical limitations. Constant screen recording can be very resource-intensive, potentially causing noticeable battery drain or performance lag on the target device. The amount of data generated and uploaded can also be significant. Their reliability might also be affected by app updates or changes in the phone’s operating system, so their performance isn’t always consistent. They offer a direct view, but often with these trade-offs in mind.