Check out Steem best delegation APR%
https://mys.github.io/steem-apr
> git clone https://github.com/mys/steem-apr
Host 'steem-apr' catalog using eg. Apache/nginx
APR% = (Earned SBD * (SBD price / STEEM price) + Earned STEEM) / Delegated SP * 365 / Days delegated * 100%
The data are taken from raw blockchain in local browser via Steem API nodes. No external hosting is needed.