Personally, I think that IELTS should be taken on the premise of the same requirements, and the application scope of IELTS is wider than TOEFL, because English universities in Commonwealth countries and some non-English-speaking countries (such as France, the Netherlands, Switzerland, etc.) all need to provide IELTS scores, and the United States and North American countries (especially famous American schools) only recognize TOEFL scores, but now it is different. More and more universities accept IELTS scores (3000+ universities in the United States accept IELTS scores). Some universities accept both IELTS and TOEFL scores, including some top 30 universities in the United States. IELTS or TOEFL scores are valid for 2 years, subject to the date when the report card comes out. Because there is no special teaching material for IELTS test, it is difficult to grasp the main points if you want to watch the "naked test" yourself. So, report to the corresponding IELTS class. It will definitely be worth it. Branches like Langer, New Oriental, Global IELTS and New Channel are all good. They all have their own textbooks (listening, speaking, reading and writing), and the teachers there will also teach some IELTS test-taking skills. After studying, review yourself, and you will be able to be targeted (TOEFL is similar). I hope these can provide you with reference.