FLENS School Manager is a free Android application developed by FLENS Inc. that acts as a communication platform for cram schools and parents. The app allows parents to send notifications, check their child's status, and send various submissions and contacts. However, it is important to note that those who do not have the distributed QR code or passcode will not be able to use the app even if it is downloaded. Additionally, a user ID and password for the child issued after the parent's registration is required to use the child's account.

Overall, FLENS School Manager is a useful tool for parents who want to stay informed about their child's progress at cram school. The app's interface is user-friendly and the notifications feature ensures that parents are always up-to-date on their child's activities. However, it would be beneficial if the app allowed for easier registration and access for those without the distributed QR code or passcode.