Traditions are scattered and easy to exploit. Can sourced knowledge fix that?

I'm from Vietnam. I've spent 18 years in software, data and AI, and for the past months I've been building Nhat Nguyet. I'd like your view on the idea behind it.

The problem

Vietnamese customs and spiritual beliefs are scattered. They live in older relatives' memory, in classical Han Nom books few people can read, and online in pages copied from site to site with no sources. My generation works far from home and is losing the dates and the reasons behind the rites. That gap gets exploited: families are told to pay for rituals to remove bad luck, buy charms, or fear certain days, with no way to check what the tradition actually says.

Our approach: knowledge first

- Sources: classical texts and licensed Vietnamese press. 1,710 articles in Vietnamese, English and Chinese, many cited sentence by sentence.

- Labels: every claim is marked as calendar fact, recorded custom, folk belief or one school's rule, so belief is never presented as fact.

- Science where it applies: the lunar calendar is computed from astronomical data and tested against NASA and Paris Observatory data.

- Formulas on top: dates, charts and calculations come from the engine, not from guesswork.

What it is for

- Families: keep death anniversaries and festivals together, share a plan for who prepares what, and read why each rite is done.

- Each person: read their own chart the way their tradition reads it, with the sources shown, as a way to reflect rather than a verdict.

- Everyone: 33 open datasets under CC BY 4.0 with a DOI, so others can check our work.

No ads. Core features are free. Web, iPhone and Android: https://nhatnguyet.org/en

Two questions for you:

1. Does "knowledge first" make you trust a culture or spirituality app more, or does it make no difference?

2. What would you need to see before relying on an app for your family's traditions?