This is the core feature, and surprisingly, it works—as long as the app isn't killed by the phone's battery saver. It captures the text content, the sender/receiver number, and the timestamp.
SMS Eye is an application (often distributed as an APK file rather than through the official Google Play Store) that allows a user to monitor incoming and outgoing SMS messages on a target device. It is generally marketed for parental control or employee monitoring, though it falls into the category of "stalkerware" if used without the consent of the device owner. sms eye 1apk