New Delhi: The Congress and the BJP today again locked horns on the prickly issue of data sharing with Rahul Gandhi dubbing Prime Minister Narendra Modi the "Big Boss who likes to spy on Indians" and the ruling party accusing the opposition party of "theft".

Taking to Twitter after allegations surfaced that data from the prime minister's official app was being shared without the consent of users, the Congress president said the NaMo app secretly recorded audio, video, contacts and even tracked location via GPS.

"Modi's NaMo App secretly records audio, video, contacts of your friends and family and even tracks your location via GPS. He's the Big Boss who likes to spy on Indians. Now he wants data on our children. 13 lakh NCC cadets are being forced to download the APP," Gandhi said on Twitter using the hashtag "DeleteNaMoApp".

The BJP, however, rubbished the charge and alleged that the Congress chief was speaking a "lie".

Hitting out at Gandhi, BJP's IT cell in-charge Amit Malviya said it was his party's app that was sharing user data with his friends in Singapore.

"Hi! My name is Rahul Gandhi. I am the President of India's oldest political party. When you sign up for our official App, I give all your data to my friends in Singapore," Malviya said, mimicking Gandhi's tweet yesterday.

"Full marks to Congress for stating upfront that they'll give your data to **practically anyone** - undisclosed vendors, unknown volunteers, even 'groups with similar causes'. In theft of all forms, Congress has never been discreet!" Malviya tweeted.