Mobile app for data entry (30-min counts and daily checklists) as well as identification of butterflies: https://play.google.com/store/apps/details?id=com.bioatlasindia. Further details of the app are at: https://www.ifoundbutterflies.org/BOI-mobile-app.
YouTube links of the demonstration of the 30-min count method, and discussion of the method:
A demo of the 30-min count method: https://youtu.be/99RikkgYuf8
A discussion on the 30-min count method: https://youtu.be/1YxG4fFd3To
Reference website on Indian butterflies: Butterflies of India (https://www.ifoundbutterflies.org)
Additionally, you will soon find the following resources here to help you get started with a new project or advance to the next stage of butterfly monitoring:
Field identification guide
A manual of butterfly counting