Arriving in Langkawi we jumped in a taxi to our hotel. The cost was RM50. Returning from the hotel by GRAB was RM15. My advice before traveling to Malaysia download the GRAB app. All the vehicles are good, drivers are very polite and fares are a third of the price of a taxi. I would say maximum wait is five minutes. The app shows you where your driver is and it’s easy to contact them.
So my advice is use GRAB.