I Need JustBeepIt but for Mobile. Any Suggestions?

Since my workflow was entirely web-based until now, JustBeepIt (https://justbeepit.com) was a perfect task management platform for me and my clients to create and manage tasks. Recently, I've started working on native mobile apps as well, but unfortunately, JustBeepIt isn’t supported on phones yet (I reached out to their team, and they mentioned future support). If you know of any alternatives, please share them here. Thanks!