mAadhaar App How To Use it & Where to Download It – Full Guide. Carrying Everywhere the Aadhaar card, the biometrics-based unique identifier Biometric scanner, recently became a lot easier when the supervisory agency UIDAI launched the mAadhaar app for Android devices. The app enables you to store all your Aadhaar details, such as name, date of birth, gender, address, etc. on your smartphone, instead of having to keep the physical card with you anymore. But the UIDAI clarified, the mAadhaar app is still in beta testing stage, and we quickly realised this to be true when we checked it out. Here we take a look at the what is mAadhaar app, How it works & its features.