People who have used Symbian mobile OS based smartphones are likely to have used some photo sticker applications for incoming/outgoing call. There is one fact - I still don't have a smartphone as of writing this post. Even so, I'm sure that an application with this feature will bring more or less freshness and a better experience to the boring default calling application on Android OS.

Controlling or banning an application's access to the Internet has many benefits, these include at least: reducing your data usage, saving your battery life, and increasing your privacy protection. These make sense especially for mobile phone users. In this regard, there doesn't seem to be any other no-root firewall apps with the same comprehensive features as NetGuard.

The popularity of the Internet brings rich and interesting network resources, but it also brings threats to our online security and privacy. For example, advertisers monitor users' online activities through the Internet; hackers break into users' network connections; malicious attacks on harmful websites are increasingly rampant, and so on. As we all know, using anti-virus software alone is not enough to guarantee our online security now. Therefore, we also need a reliable network security software to provide comprehensive protection.

Natura Sound Therapy is a parameterized sound simulation player software that contains all kinds of natural sounds (such as waves, streams, thunder and lightning, forest twilight, and so on mysterious sounds from the nature). It can let the physically and mentally exhausted people living in a noisy city feel the purest natural sound on a computer, and give them some spiritual comfort.

ElectroDroid is a very popular Android application for learning various electronic devices in a circuit, developed by Demetrio Iero from Italy. It is very professional and powerful, provides you with a variety of circuit related information query and calculation services, and comes with a comprehensive database on electronic components. Therefore, it has been regarded as one of the essential tools for employees in electronics related industries.