I found out about this app, my last day in bangkok, but sure it helped me for that day and my next trips to phuket and chiang mai, just make sure to download it where you have wifi, you dont need alot of space and works perfectly offline with gps on.
I downloaded (and deleted) 5 apps before finding this working/zoomable/English map....GPS even works. Well done!
Only part missing is be able to search place name..it offer feature only search by exact street name and number
Helped in times when I had no Wi-Fi and before I bothered to get a data plan. Clearly labeled sites and street names, very useful
Best offline map for thailand
just what I need to get around