When it comes to froyo, my heart still lies with Yoguru, though Red Mango's froyo didn't melt as quickly as the former. Here's when eating quickly comes in handy heheh.
Psst Yoguru's Raffles City outlet is much closer to City Hall MRT. But the Kallang outlet is still the best and it'll be much more accessible when the next stage of the Circle Line is launched on April 17!
Red Mango
#01-140G (Tasty Treatz, Carrefour's upstairs)