Aloha Poké probably holds 1st place as my favourite poké place in Singapore.
There are 3 sizes to choose from ($11.90, $15.90, $19.90) but I typically go for the medium one (Standard Nalu) as that seems to fill me up quite comfortably. There's a choice of either a rice or salad base, and then tuna or salmon prepared in original, wasabi mayo or spicy marinade - the spicy is greeeat. From there you can have a variety of add ons and superfoods and the poké bowl will be served to you with spring onions, pineapple and a lime wedge. The bowls are overflowing, and sure - it might be a bit of a challenge to gracefully negotiate your way through the serving, but it is worth it. The fish is perfectly marinated and is a decent portion for what you pay.
If only they had the customisable bowls all day long, I wouldn't bother going anywhere else. But unfortunately this is just a day time thing as they only have a fixed menu in the evening (the dinner Ultimate Poké Bowl is just not as good as the lunch ones).
Otherwise... FAVE. 👍🏼👍🏼