In your last few weeks before the CFA, a good share of your time should go to the places you keep losing points. The hard part is figuring out where those are. Your own answer data, and AI built on top of it, can suggest where to look. It works best next to the topic weights and a list of what you haven't covered yet.
I'm a CFA charterholder and I run FreeFellow. AI won't pass the exam for you, and a lot of what gets marketed around it overpromises. What it's good at here is one specific problem: people are bad at diagnosing their own weak spots.
Why your gut is a bad guide
Ask a candidate where they're weak and they'll usually name the topic that scares them. Their answer history often says something else.
You feel weakest where you're most anxious, and that's usually a topic that feels intimidating, like derivatives or the more abstract parts of quantitative methods. Feeling anxious about a topic isn't the same as losing points on it, though. You could be fine on derivatives and still be dropping a dozen points across the exam on a discounting convention you never think about, precisely because you never think about it.
If you study by feel, your hours go to the scary topic while the points are somewhere else. That's part of why two candidates who put in the same hours can end up with very different results.
What your data can show you
Your answer history can show you this in a few ways.
The simplest is practice that adjusts to you. Once you've worked through a topic, the questions lean toward what you're missing and away from what you've already got. It can't tell a concept you haven't studied yet from one you keep getting wrong, so learn the material first and let the adjusting do its work on review.
Next is accuracy broken down by topic, by Learning Outcome and by difficulty, with trends over time. That shows you where the points are leaking, not where you feel shaky.
The most useful is spotting a repeated error behind your misses. On a well-built question, each wrong choice is written around a specific misunderstanding. If your wrong answers keep landing on choices built around the same one, that's a likely pattern, not a proven cause. Redo your working on two or three of those misses, then try a related question you haven't seen. If the same error shows up, it's worth fixing, and the fix may help on other questions that test the same idea.
On FreeFellow, the readiness score is free, and so is the CFA Level I diagnostic, which gives you a readiness score and a weak-topic breakdown after 12 questions with no signup. Twelve questions can only touch part of the exam, so treat it as a first look. Focus practice on your weakest Learning Outcomes and analytics by topic and Learning Outcome come with Fellow. Common traps, which shows the misunderstanding each of your wrong answers was written around and lets you drill them, comes with Fellow Plus. Those labels describe the choice you picked, so check them against your own working.
None of this does the studying for you, and it needs enough answers behind it to mean anything. Do a good number of questions, untimed at first, and patterns will start to show. With only a few dozen answers, it won't tell you much yet.
FreeFellow is a CFA Institute Prep Provider, independent of CFA Institute, and does not promise a passing score. You can start with the free CFA Level I practice questions.