Is it true grab or uber driver earn at least 5-6k after deduction of rental and petrol? Any suggestion as my husband had a stable job but he want to switch after many had say it earns well and flexible. Any real driver here to share experience too.

I'd say that you should get your husband to try it out first, maybe on weekends or after work just to see things for himself. As with all companies, Grab had their own ambassadors too - so it's better to see things for himself for a few months before doing a definite switch. Uber is no longer operating in Singapore, so there's only Grab now - since then, there has been a lot more talk over the profitability because there are also limitations that they give. My dad is a relief taxi driver and he said that Grab was working in partnership with a taxi company and all the drivers were only allowed to accept calls from Grab and nowhere else - not sure if that's still the way it works now but it's a double-edged sword. You'd also have to have a proper estimation and forecast of finances because unlike a fixed income, driving Grab is mainly based on how much you work and what kind of calls you pick up. Make sure you don't end up with a situation where there's not enough money at home, or that your husband is always out driving that he doesn't have time for family!