so, is it best to redeem interest daily
remember that you should have at least 10kmd in one UTXO and there is a 1 hour locktime before the interest will start accruing. So if you do it everyday, there is 365 hours in locktime in one year. The best i think so far is monthly.
https://www.atomicexplorer.com/#/interestI assume you wanted to refer to this link
https://www.atomicexplorer.com/#/interest-calc instead? You can simulate different strategies. Indeed if you take into account the number of hours when no interest is accrued; among the frequencies suggested by the site, monthly seems to give the highest returns.