That depends on what kind of fund you buy. Buying a money fund, as long as it is confirmed after subscription, will have income every day. There is no need to calculate profits. The fund company will announce the income of every ten thousand copies every day.

If you buy other funds, such as stock funds, hybrid funds, index funds and so on. You won't make money every day, just on the trading day of the securities. Moreover, according to the fluctuation of the stock index, you may make a profit or lose money every day, and the daily fluctuation range will be announced after the closing in the evening.