Fruit feed mainly as you want lots of flowers to set. But you still need a bit for leaves and roots as the plants are still growing. I use comfrey liquid with a dash of manure
and judge the effect empirically - if it's working, don't change it
I also have an old bottle of Westland conc tomato feed, suitable for organic growing, which I use for tomato plants still indoors in pots - doesn't smell like my potions. Haven't been able to find a new bottle yet - don't know who stocks it now, or even if they still make it.
I use tomato feed for chillies, peppers, aubergines etc too. Oh and for houseplants as well if they are being grown for their flowers.