I recently built a document translator app called Kintoun (https://kintoun.ai), and to my surprise, it ended up outperforming Google Translate and DeepL in several cases. I wrote a blog post to share what I learned while building and launching it.
The original post is on my blog: https://dingyu.me/blog/lessons-translator-app-beats-google-translate-deepl. Since Indie Hackers doesn't support images, I'll just include the key points here.
If you want to see the full post with examples and screenshots, feel free to check it out.
Here are the main takeaways:
Surprise: my app is actually better than Google Translate and DeepL
Product distribution is as important as product development
Inertia + Svelte is awesome