Serhii Baraniuk writes…

I built Writing9 to help people improve their IELTS Writing skills.

IELTS = International English Language Testing System.

Back when I was learning English, I struggled with writing and wished there was a tool that could give real feedback – so I made one.

Writing9 checks essays, points out mistakes, and gives an estimated IELTS band score. It’s like having a personal tutor, but way faster and more affordable. Thousands of people use it every day…

Today, we bring in around $12K/month

Looks like he launched it in 2020 as a basic app which you could probably vibe code today

More examples of people earning good money by helping others prep for specific exams…

• Her 3-Hour Crash Course Earned $1 Million in 7 Months
• Niche Study Guide Selling on Amazon = $8.7K/Month Profit

What exams have you taken in the past?

Might be an opportunity to create an app / course / study guide there

Or perhaps even start off as a one-on-one tutor.