eRinjani is a free Android app developed by Sasambo that allows users to book tickets for Mount Rinjani trekking. The app offers several features that make the ticket booking process for Mount Rinjani easier and faster.

With eRinjani, users can easily check the quota of Mount Rinjani trekking schedules and book their tickets online. The app also offers a secure payment gateway that allows users to pay for their tickets using various payment methods.

Users can also search for their preferred trekking organizer and leave feedback or review to improve the services of TNGR and Trekking Organizer. Additionally, the app provides the latest news and updates about Mount Rinjani trekking, and users can receive important notifications regarding their trekking process.

eRinjani also allows users to reschedule their trekking schedules, making it more convenient for them.

Overall, eRinjani is a must-have app for anyone planning to trek Mount Rinjani. It's easy to use, efficient, and provides all the necessary features for hassle-free ticket booking.