Take the MRT and bus systems, and use Grab if you need to get from point to point. If you have Apple Pay, everything is pretty much contactless so you can use those to actually pay for transit. Or you can get a transit card from an MRT station.
I usually use Google Maps to route myself through the transit options. Singapore's great in that transit is convenient, frequent, and basically takes you anywhere you want to go extremely cost-effectively.
MRT is pretty convenient in Singapore. Public bus is good n cheap as well. U might need a transportation card (i don’t remember what it is called) for more convenience.
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