Last updated: 14 October 2026
App name: Hari Baik Primbon Jawa (com.htd.haribaikprimbonjawa)
This privacy policy explains how we handle user information in our app “Hari Baik Primbon Jawa”. We respect your privacy and are committed to protecting it. This app lets you find good days for moving house, weddings, building, travelling, business and other events according to Javanese primbon rules, check the naga directions and good hours of any date, calculate traditional house measurements, view a Javanese calendar, and check a birth weton.
We DO NOT collect, store, or transmit the birth dates or any other dates you enter. Every calculation runs locally on your device and the result is only shown on your screen. The app has no history, no accounts and no servers, and we do not collect personal data such as names, contacts, photos or location. The app does not use the camera, the microphone or location.
The only thing the app saves on your device is a small setting that records that you accepted the notice shown at first launch.
Our app uses Google AdMob to display ads. AdMob requires an internet connection. Google may collect and use certain data to serve and measure ads, such as your device's advertising ID, IP address (from which an approximate location may be derived), device and app information, and ad interaction data. Whether ads are personalised depends on your device settings. You can reset your advertising ID or opt out of ads personalisation in your Android settings (Settings > Google > Ads).
Please refer to Google’s privacy policy: https://policies.google.com/privacy
This app is designed for general audiences. We do not knowingly collect personal data from children under 13. If you believe a child has provided us with personal data, please contact us.
Since we do not collect or transmit the dates you enter or any other personal data, there is no personal data stored on any external server of ours that could be breached. The data you input never leaves your device through this app. Ad-related data is handled by Google according to its policies.
INTERNET and ACCESS_NETWORK_STATE: only for loading Google AdMob ads. All features work without an internet connection.AD_ID).The calculations follow traditional Javanese rules. We do not own, operate or control these sources.
Javanese primbon has many regional versions, so results may differ from other books or websites. We do not guarantee that any information is accurate, complete or up to date. Listing a source here is not an endorsement and does not mean that the source is affiliated with this app. If you believe any information is wrong, please contact us (see below) and we will review it.
This application is an independent cultural and entertainment tool and is NOT affiliated with, endorsed by, or connected to any palace (keraton), government agency, the Indonesian Ministry of Religious Affairs, any religious organization, Yayasan Sastra Lestari, the Wikimedia Foundation, or the publishers of any primbon book.
Primbon readings are traditional beliefs, not scientific facts, and are not religious, medical, psychological, financial or legal advice. Do not make important decisions such as marriage, business or health matters based only on this app. The developer accepts no liability for the use or misuse of the app or its results.
We may update this Privacy Policy occasionally. When we do, we will revise the “Last updated” date at the top of this document. We recommend reviewing this policy periodically.
If you have any questions or concerns regarding this privacy policy, please contact us at: