Pincode can be searched by State/District/Pincode/OfficeName. All fields are optional and partial search is allowed for all the fields. And you can get additional details like status, sub-office, Head-office, location and telephone number.
Currently it supports for the following states in India
1. Andaman and Nicobar Islands
2. Andhra Pradesh
3. Arunachal Pradesh
5. Dadra and Nagar Haveli
6. Daman and Diu
9. Jammu and Kashmir
20. Tamil Nadu
22. West Bengal
Support for rest of the states will be added soon.
* Added support for Android 4.4.
* Move to SD card option
* Added Jammu and Kashmir, Maharashtra and West Benagal.
* UI changes for android versions lesser than Honeycomb
* Bug Fixes