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If you're keen to learn a new language, or improve your number skills, a new app claims to make you a pro in a matter of weeks. 

The free UnlockYourBrain Android app teaches languages, history, plus a range of other tailored subjects - and independent tests found it can even double maths skills in 14 days.

Each question takes two to three seconds to answer and the device's screen can't be unlocked until the correct answer is entered.

The free UnlockYourBrain Android app teaches a range of languages (pictured left), history, maths plus a range of other tailored subjects. Each question takes two to three seconds to answer and the device's screen can't be unlocked until the correct answer is entered

But if the phone needs to be accessed quickly, or in an emergency, questions can be skipped.  

The app was created by German-based developers Simon Smend and Felix Nienstädt.

Its algorithm learns from individual users' answer patterns to ensure that questions are always matched to individual aptitudes.

This means that the app is able to teach users just as effectively as other methods, but in significantly less time, claim the developers.

UnlockYourBrain initially focused on vocabulary and mathematics questions, but it has recently launched a content marketplace that lets users add extra subjects, and customise their learning packs, for free.

For example, if a student has a French vocabulary quiz at the end of each week, they can add the specific words they have learnt into the app and only be tested on those.

Researchers from the University of Potsdam recently carried out an independent experiment to test the effectiveness of the app.

They studied more than three million responses, from 13,285 participants, who used the app between 15 February and 11 June 2013.

Researchers from the University of Potsdam recently carried out an experiment to test the effectiveness of the app. They studied more than three million responses, from 13,285 participants. They concluded that users, on average, doubled their performance times and accuracy over a two-week period (graphs pictured)

UnlockYourBrain initially focused on vocabulary and mathematics questions, but it has recently launched a content marketplace (pictured left) that lets users add extra subjects, and customise their learning packs - for free. A typical history question is pictured right

The experiments looked at the accuracy and speed at which users answered maths' questions.

They concluded that users, on average, doubled their performance times and accuracy over a two-week period.

Mr Smend said: 'In a time of information overload, processing abundant content has become a pain point for many people who want to learn, but don't know where to begin.

'UnlockYourBrain breaks down information into bite-sized pieces. It makes learning and training an implicit part of people's days - without requiring the motivation or organisation to reserve a time to study. 

'This has resulted in faster learning speeds and proven retention rates.'

The firm told MailOnline it is working on releasing the app on other platforms, including iOS and GoogleChrome, early next year.