The digital initiative entitled Start Thinking Soldier centres around a series of online challenges so users become more aware of their strengths and weaknesses.
The Army launched the scheme alongside research showing 60% of 17 to 21 year-olds accepted the job they are in with less than one hour's consideration and 68% have no career path in mind.
Research from Populus for the Army found 86% of this age group are unaware of their own strengths and weaknesses - which can cause them problems later in life as more than 77% of people over 30 change career paths at least once.
Lieutenant Colonel Eileen Cunningham, of the Army's recruiting group national headquarters, said: "Each year the Army needs to recruit 15,000 quality soldiers and in order to do so we must forever look to exciting and innovative ways to engage with our target recruiting base.
"Start Thinking Soldier is a more discreet and personal way for people to test their Army skills and receive invaluable personal insights, whether or not they are considering a career in the Army."
And Tomas Chamorro-Premuzic, senior psychology lecturer at Goldsmiths, University of London, added: "People perform better and are happier if they work on something they are good at. Hence knowing your strengths and limitations is a key determinant of both job satisfaction and performance.
"Equally employers tend to believe happy employees do better at work, but in reality it is high-performing employees who end up being happy."
Army to use online games for recruitment
The British Army has launched an online programme for would-be recruits to find out if they have the skills to be soldiers.
