You probably built enough to start finding out from others. Try to find one person who wants it (or why they don't). Then another, and another.
Some ideas, distilled from [0]:
1. Find subreddits who would find it helpful to solve their real problems
2. Build karma there for a week or more, be helpful without advertising
3. Only if the sub allows self-promo, offer it for free for first 500 people (or however many)
4. Collect their feedback, build on wahat they demand, always be shipping and listenign (have easy way to receive feedback
5. Take the top requests on the public issue-lists/ideaboards for your compeitors; nail those
6. On socials (YouTube, TikToik, post in 2 or 3 consistent formats, don't just copy stuff)
7. When you find places with people you suspect would be receptive (on social media), suggest "Hi, I made this ____" in a helpful way, don't be overly self promotional, but be modest and share what you have to help
So,
a) Keep it free long enough for users to know what product is and you to learn what they need
b) Constantly be listening and improving.
c) Always be launching
You probably built enough to start finding out from others. Try to find one person who wants it (or why they don't). Then another, and another.
Some ideas, distilled from [0]:
So, [0] https://www.reddit.com/r/MobileAppDevelopers/comments/1pzchh...