It depends on one’s interests on which platform he/she like web or app, and also which type he/she able to understand the syntax and technologies related to it. If you are asking easier, then both are easy and both are difficult on their perspectives. Some have easy interface but coding is difficult and vice-versa. You must not think about which one is difficult because if you thought in this way then you will find every career difficult. You see what your likings are, what your goal is then move on from thereon and build your career. That will be good for you.