The country's own numbers — GDP, prices, work, health, education, and the public institutions that run it — so the data the government puts out is one click from its source. Descriptive, sourced, never a judgment.
Economic and demographic series come from the World Bank Open Data API (CC-BY 4.0); the public-institution counts (schools, hospitals, colleges, police, and more) are transcribed from official Indian government reports — each tile links to its source and states the year it is “as of”. Series lag differs, and years a source hasn't published are simply absent from a chart — missing data is never shown as zero.