Whether a course is worth paying for, what one buys you, and what it does not.
The right API 570 resource depends on whether you are short of questions, teaching or the codes themselves. Here are ten options, ordered by how well each serves that question.
ComparisonThere is no dedicated API 580 app in the UK App Store and API sells no practice questions, so self study splits between the official documents, a few courses and one question bank.
ComparisonAPI 653 already has three iOS question-bank apps, so the practice side is crowded. The gap is price transparency: several courses publish nothing at all, and the exam itself is the fixed cost underneath everything.
ComparisonTen ways to learn ASME BPVC Section IX, from the code text to instructor led courses, certification routes and the software teams use to review procedures.
ResourceYes, and the real question is what the degree adds. It does not replace the exam, it does not exempt you from it, and it costs a great deal more than standalone preparation.
TrainingNothing in the qualification route requires a course. Whether skipping one is sensible depends almost entirely on how much of the syllabus is genuinely new to you.
ComparisonThree of the names people compare are not competitors at all. Two of them run the exam. The rest sell preparation for it.
TrainingNo rule says you must take one. The honest answer depends on how many of the thirteen subjects you have never studied.