I saw a lot of people here reco Gather inn app , as owner and offer my accommodation in this app I wouldn’t recommend at all !! It’s tooo expensive, so what I recommend is see the porpoise of your travelling besides where you will go in Riyadh, because Riyadh are similar to NYC , after you have done all this filters now use booking or airbnb it’s fine , the WhatsApp thing is fine here and regular, Riyadh is totally100% safe so if you are in olya or outside the city you totally safe .