What is the Device Control application, how does it work?

According to the introduction of Expert Systems Co, Device Control is a Business app on the Android platform. There is currently a 3.2.825 version released on Aug 14, 2017, you can see the details below.

Stop secret recording and tracking. Control your security and privacy.
-- This app blocks the microphone, cameras, internet, sounds,
to prevent secret recording of voice, phone calls, photos, videos,
and to block access, data transfers, tracking of location and use,
by hackers, malicious apps, spies, government, companies, data collectors,
and anyone else without your permission.
(Some top govt officials and executives block their camera and microphone.)

"Device Control" app provides controls not available on most devices:
1. System Lock: Locks the System & Power Saver Privacy Lock (WiFi, Bluetooth).
2. Camera Lock: Blocks all Cameras. Blocks photo and video recordings. (+)
3. Microphone Lock: Mutes the Microphone. Blocks microphone recordings. (+)
4. Internet Lock: Blocks Internet access. Stops Wifi and Mobile Data traffic. (+)
5. Sound Lock: Blocks all Sounds & vibration. Blocks sound control keys. (+)
6. Telephone Lock: Blocks the Telephone. Blocks calls and messages. (+)
7. Password Lock: Protects access to this app and widget locks. (+)

This app is useful to:
-- Avoid secret recording, tracking, hacking, data transfer.
-- Protect your privacy and security.
-- Reduce data usage and bandwidth charges.
-- Prevent unauthorized use of functions by others.
-- Extend / prolong battery life, reduce energy use.
-- Avoid accidental and "pocket" recording.
-- Ensure complete device silence when needed.

What is included:
++ FREE "System Lock" with "Power Saver Privacy Lock".
(+) Other locks can be quickly purchased in the app.
-- Note that many other "free" apps make you pay by
displaying the annoying, intrusive and insecure ads;
and many also collect and sell your personal data.
Proper privacy and security are almost never free.

App privacy and security:
++ This app does not have access to your photos or data.
++ This app does not collect your personal data.
++ This app does not send any data from your device.
++ This app does not have access to the Internet.
++ This app does not display marketing ads.

How to use:
-- To lock or unlock any function, tap its lock icon (or widget.)
"Device Control" app will immediately lock or unlock that function.
This app will maintain the lock state indefinitely until you change it,
even if the device is restarted or turned off.
-- Lock the "Password" lock (or widget) to prevent others
from using this app and changing the app or locks.

App features:
-- Quick: Instantly lock and unlock with lock widgets.
-- Easy: Lock several functions with one touch.
-- Friendly: Detailed searchable help documentation.
-- Flexible: Most app settings can be changed.
-- Modern: Designed for tablets and multi-window devices.
-- Reliable: Works with most standard phones and tablets.

Notes:
-> To uninstall: Settings > Deactivate this app > Uncheck "Enable Device Control".
-> This is a security app. Modifying or reinstalling this app is not recommended.
-> To reinstall: Backup the app before uninstall to preserve app data.

Help:
-- For questions or issues, please tap (?) "Help".
-- To report issues or suggest improvements, send "Mail" from the app.
-- If you like this app or find it useful, please rate it in the app store.
Thank you.

Benefits: Stop tracking, improve security, block spying, prevent recording, avoid ads.
Functions: Lock camera, stop video recording.
Mic lock, disable microphone, block audio.
Network firewall, disable data, disable wifi, block email, block updates.
Silence music, mute speaker, stop vibration.
Lock phone, block texting, stop SMS, screen lock.
Effects: Spy blocker, stop hackers, block malware, virus protection, secure access,
save battery power, reduce mobile data, reduce bandwidth usage.

Copyright (C) 2014-2017 Leo R. All rights reserved.
App purchases are final and non-refundable.

What's new in version 3.2.825 FREE: System Lock, Power Saver Privacy Lock (Wifi, Bluetooth.)
-> To uninstall: Settings > Deactivate > Uncheck "Enable Device Control".
-- For questions or issues, tap (?) Help or send Mail from the app.
++ No ads. No data collection.