What is spread?
Why the buy price is a little higher than the sell price.
The spread is the small difference between the price to buy and the price to sell. It's how Coinwaka earns on buy/sell at launch, instead of charging separate fees.
For example, if the market rate is 130 KES per USDT, Coinwaka might let you buy at ~132 and sell at ~128. The gap is the spread.
The rate you see at checkout already includes the spread, what you see is what you get. Because prices move, your final amount can change slightly between the quote and payment confirmation.