曼谷旅行指南Tristansoft is a free travel and navigation Android app developed by TristanSoft. It is a comprehensive city guide that covers Bangkok, Chiang Mai, Phuket, Krabi Town, Koh Samui, Pattaya, Pai, Hua Hin, Surat Thani, Koh Lanta, Chiang Rai, Koh Chang, Trang, and Sukhothai. The app aims to help travelers plan their trip to Thailand and provide them with tips to make the most of their time in Bangkok.

The app allows users to find the best hotels near popular landmarks, plan their visits to restaurants, and read reviews about landmarks, hotels, and restaurants. It also includes the latest pictures of tourist attractions, GPS and directions, and nearby hotel and attraction search and distance sorting.