I went till the end of the tree on Duolingo 5 years ago on just the free tier. Installed it a few months ago for my daughter and now the free tier is useless, c

I went till the end of the tree on Duolingo 5 years ago on just the free tier. Installed it a few months ago for my daughter and now the free tier is useless, can't do much at all. Memrise is more useful on free tier but quite buggy. I was looking into building a language learning app the other day to help my spouse with their passion but the market appears over-saturated. The only niche I see is for a good game teaching English alike https://play.google.com/store/apps/details?id=com.prodigygame.prodigy https://play.google.com/store/apps/details?id=com.prodigygam... but that's not something I can arrange. https://docs.google.com/document/d/1pC4k3i-U8-uSAsd2qrg_EX-k52XsxMpIfhqx76HWQ3s/edit https://docs.google.com/document/d/1pC4k3i-U8-uSAsd2qrg_EX-k...