The driver behavioural app, Aviva RateMyDrive, will monitor motorists taking part in the test for 200 miles, including acceleration, braking and cornering. The data is then turned into an individual 'score' which helps determine the motorist's premium.

Safer drivers stand to earn a discount of up to 20% on their motor insurance, says Aviva.

The UK insurance group has been a pioneer in trialling in-car black box telematics, which monitor driver behaviour and car use on the road, but the technology is expensive and considered intrusive by prospective users.

Steve Treloar, Aviva's retail director, says: "Unlike traditional 'black box' telematics solutions, Aviva RateMyDrive app only needs a small amount of data - typically 200 miles - to create an individual driver profile. And because the app is free to download and uses the customer's own smartphone, there is no need for motorists to have a black box installed in their car."

Aviva has already tested the technology on its own staff and is now looking for 5000 volunteer drivers with android smartphones to test drive the app.

Says Treloar: "For those who complete the RateMyDrive app trial, we will provide feedback on their driving and a quote - including any discount earned from safer driving - should they wish to take out Aviva insurance.

The app will be particularly valuable for people paying an annual premium of over £400, such as young and first time drivers. For users paying a premium of between £200 and £400 per year the discount will be capped at 10%, while those with a premium below £200, who have a history of safe driving, will not qualify for a discount.