Introduction
Looking at the way technologies operate now most especially on mobile phones, the Android operating system now has gone far above any other operating system to the extent of allowing every available application on the mobile phone to work together at the same time at the expense of the user by either updating information or versions. 80% out of the Android applications are been updated with one or two things daily, weekly or Latest monthly.
Problem Overview
At times, users of Android phones need to lock some application on their mobile phones from accessing the internet for one reason or the other.
Most times the internet package bundles might be so costly that one will intend to manage the data to run on it for weeks, months, but some unused application has used more data than the frequently used ones which could be so frustrating.
For example: My child is playing games using my smartphone, he might mistakenly tap on some appeared Ads in the game, buy/paid, apps /games, make in apps purchase, pay for access to new levels, weapons, tools and many more that could make me lose 80% of my data bundle.
In order for me to prevent this from happening, what I must do is to get an internet lock application that will enable me to lock most of my application from accessing the internet connection.
This is why most users desire to use an application that will provide these layers security.
Introducing NetGuard
Repository:
https://github.com/M66B/NetGuard
NetGuard is an android application that provides simple and advances a way to block access to the internet with no root required. NetGuard is an application that allows individuals to perform the task of denial and access of Wi-Fi / Mobile connection of an application and addresses.
Benefit of NetGuard
- Reducing Data usage
- Saving of Battery
- Increases privacy
Saving of Battery 
The rate as at which battery is been drained could be annoying, most users find it surprising that How could my battery drain so fast? without understanding that most installed applications are battery drainer on their own due to their work rate on the smartphone.
For example: Using your smartphone to perform minor tasks such as sending text messages, but you noticed that with that little time of sending text messages you have lost up to 15% out of 100% of your battery. This is a bad experience because most users would think the mobile phone battery is bad and they will have no choice than to replace it with a new one but after getting this replacement they will still complain about the same issue. Users most time feel discouraged and lastly decides to abandon the smartphone.
Using the NetGuard application to lock many unused applications will stop them from running with the internet and the same time put a hold on their functioning. This will save battery life from draining unnecessarily.
Reducing Data Usage 
This is the major reason I use the NetGuard, I am able to lock most of my application from running on the internet whenever my data is on. For real mobile data can be very expensive and ever increasing amount of application need access to the internet.
Many of the application load along with features such as Background Data, Cache Data, and many more that wipe away mobile data unnecessarily.
Using the NetGuard allows me to lock many unused applications from accessing the internet and that has then since reduced my smartphone data usage.
Increase Privacy 
NetGuard is an application that is specialized in application privacy, users can use NetGuard to lock application from accessing the internet / Wi-fi. This is actually one of the reasons I use the NetGuard, I am able to lock my applications from accessing the internet in order for me to reduce my data usage.
Some of the Features of NetGuard are:
No Tracking :
Advertisement is always served to users based on their online activities with possibilities that users can be tracked. NetGuard does not have any advertisements so the users are safe from being tracked and luckily users personal data is 100% safe from third parties.
Simple User Interface: 
Experiencing a poor user’s interface could be so annoying that will allow users to spend hours, days before getting to understand whatever the features are used for. NetGuard is not like that because it is very simple to understand in less time.
Conclusion
NetGuard is a way ahead of other similar applications because it gives true privacy and the application is able to lock other system applications without the need for upgrade or payment for additional features.