I built a lightweight cert prep app - looking for honest feedback

I built a cert prep app for myself while studying for IT exams (CompTIA, Microsoft, etc.), and I’m sharing it to get honest feedback.

It’s focused on exam-style practice, especially PBQs — not video courses or walls of text.

I’m not pitching anything here. I’m looking for honest feedback:

• bugs
• UX pain points
• features you’d actually want
• or reasons you’d never use it

You can try it here (free sample, no account needed):
https://cert-prep.net

Happy to answer questions about how I built it too.