Batak, Javanese, Sundanese, Balinese, Chinese, Hijri, and Gregorian calendars for one and the same date.
Kosmogram Nusantara



Culture · Intelligence · Technology
Everything rests on one digital library, built together with the public. Out of it came a calendar app, a batik design tool, a conversational assistant, a video channel, and a shelf of books.
Our apps are available on the App Store and Google Play
About
Most cultural knowledge in Indonesia lives in memory and habit rather than in records. As long as someone still practises it, the knowledge holds. Once the practice stops, there is usually no written reference left to recover it from.
So we work on two things at once. First, recording: gathering cultural entries with the public, checking them, then storing them in one consistent structure so they can be found again. Second, putting them to use, through products that bring the archive into everyday life.
Products
Each has its own site and app, and all of them read from the same source.
Batak, Javanese, Sundanese, Balinese, Chinese, Hijri, and Gregorian calendars for one and the same date.






Food, textiles, scripts, instruments, ceremonies, folklore, manuscripts.





Books
Written by Hokky Situngkir. Some are studies, others are comics drawing on the same material.
Ecosystem
PDBI holds the data. The other products take the parts they need and present them in their own way.
Gathers and stores every entry, from public contributions through to the checked record.
Opens the archive through conversation, for questions that don't have a keyword yet.
Uses entries about time, season, and sky to explain the day you are in.
Goes deeper into batik, down to motif structure and how it is composed.
Retells what is in the archive as short video.
Questions
Every app is free to download. Kosmogram Nusantara and PDBI offer in-app subscriptions that unlock advanced features. phyBatik comes in two versions, free and Pro, both on the App Store and Google Play. Obrol Sandi is free to use, within certain usage limits.
From public contributions through the Indonesian Digital Cultural Library, built together with the Sobat Budaya community and individual contributors across the country. Entries are checked before they enter the collection.
Yes. Anyone can add a new entry, fill in gaps, or correct mistakes at budaya-indonesia.org.
Each product has its own site: kosmogram.id, phybatik.co.id, budaya-indonesia.org, and budaya-indonesia.ai. The apps are on the App Store and Google Play.
At our official Tokopedia store. Each title has its own page on this site.
Contact
Joint research, publishing, cultural programmes, or product development. Tell us what you have in mind and we'll reply.