Good morning sir,! I want to share with you my top favorite apps to use in Istanbul. GOOGLE MAPS-Without a doubt, Google maps have been our best friend everywhere we go. We that I can always find my way to places that I have never been to. It's very accurate and trustworthy. You can also use it offline in case you don't have the internet on your mobile, just download beforehand the Istanbul map into your phone, and you will be ready to use it in the right way. If you are coming to Istanbul soon you will need a Turkish visa. Only then can you enter the country. You can get more info about Turkey visa via our Turkey visa page.