Mr Srivastava, who belongs to Kanpur and lives in Bengaluru, was arrested on August 1 based on a complaint by the deputy director of the Unique Identification Authority of India or UIDAI.
The IIT-Kharagpur postgraduate developed the mobile app for Aadhaar KYC or know-your-customer verification and uploaded it on Google Play, from where Android mobile users can download it.
However, the accused illegally accessed Aadhaar information on the National Informatics Centre's server, police said.
Accusing Mr Srivastava of committing a "very serious" crime by exposing private information of citizens, police said the city's crime branch along with cyber crime sleuths arrested him.
The police said a computer, four laptops, a tablet, four mobile phones, six pen drives and other material worth Rs 2.25 lakh were found with him. Further investigation is on, police said.