Depends on the size of the pot and the water holding capacity of your soil mix.
However, there is no need to water every day, just water thoroughly until there is some water coming out of the bottom of the pots, then leave them until the top inch/2-3cms of the soil surface has dried out before watering again.
Sticking your finger into the soil makes the best "moisture meter" in the world!
Hope this helps, Organoman.