Most studies of EFL writing usually used grammar checking to help check writing errors. However, it is not enough since EFL learners have to learn how to create more meaningful content, particularly using their surroundings in authentic contexts. Therefore, we develop one app, Smart RoamLingo, with recognition technology (ITR and STR)  to provide lexical resource from authentic pictures and generative-AI(GPT) to provide meaningful vocabularies and sentences, then inspire EFL learners to write more.  The results revealed that the learners with ITR-texts had a significant difference in the learning behaviors like revision and post-test. Furthermore, they could also write more meaningful sentences in the assignments. Therefore, UEnglish with ITR-texts and Smart QAC could facilitate their EFL writing in authentic contexts.