I built WealthTicker because every Indian mutual fund site I used was really a distribution funnel. The "top rated" list was whatever paid best, and the numbers came from a factsheet PDF nobody recomputed.
So I made the boring version: take AMFI's public NAV history for all 14,000+ schemes and compute everything myself.
CAGR, volatility, Sharpe, Sortino, alpha, beta, up/down capture, rolling returns, drawdown episodes all derived from the raw price series, refreshed continuously. If a number is on the page, there's a /methodology entry telling you exactly how it was calculated.