Why is there no mobile app for LeetCode yet?

LeetCode doesn't have an official mobile app. There aren't any third-party apps either, because LeetCode doesn't allow submitting solutions through their APIs. Their old web version isn't ideal for coding on mobile browsers. And their new web UI doesn't even support submitting solutions from mobile devices.

Wouldn't a mobile app be incredibly useful for practicing LeetCode problems on the go, whether you're outdoors, stuck in traffic, commuting, or sitting anywhere away from your desk?

Many of you might find typing code on mobile devices difficult, which is a valid concern. I find it difficult too. However, this issue could be addressed by adding a custom keyboard layout to the app that includes common special characters used in coding.

Would you find such an app useful?