There are around 700,000 applications designed specifically for iOS operating systems, around 675,000 for Android and around 15,000 for Blackberry, according to specialists.
Within this panorama, cases such as the game “Angry Birds” stand out, which has broken all kinds of records in terms of downloads, since during its first week on the market it registered around 20 million.
Angry Birds currently has an impressive 1 billion downloads ig database worldwide, a figure that is increasing due to the recent release of the new version of the game, which fuses its traditional characters with those from the film Star Wars.

Another success story is Instagram, an application that allows users to edit and publish photos on various social networks. It was launched in October 2010 and had more than a million users in its first two months of creation.
Within a year of its creation, the application already had around 10 million registered users, so Facebook became interested in it and on April 9, 2012, acquired it for 1 billion dollars.
Nowadays, there are all kinds of applications, to know the name of the song that is playing on the device, to know the characteristics of a product by photographing its barcode, to measure ambient noise and even to keep track of the menstrual cycle.
And among those that only waste resources or occupy the memory of mobile devices, because their function is not defined or is irrelevant, there is the case of “the virtual girlfriend”, which automatically sends love messages to the cell phone.
There are also ones that detect ghosts, that “charge the phone battery” just by shaking it, that predict the future, that indicate the mood of users just by scanning their fingerprint, or that record how much time a person can spend pressing a button on the device.
Therefore, users must determine which ones are most convenient for them and have a positive effect on improving their lives, so it is advisable to evaluate their performance and the space they will occupy on the device.
In addition to not saturating mobile devices with unnecessary tools, users can use other techniques, such as closing applications that are not being used, to avoid consuming device resources and to make it work more efficiently.
Some computer security experts also recommend being careful when downloading applications, as in 2013 they expect official app stores to host a greater number of viruses that can compromise users' security and data.