No native iOS or Android app, but Senly works as a PWA (Progressive Web App). You can "install" the portal on your phone and use it as a regular app — with its own icon on the home screen and without the browser bar.
Nearly all features work on mobile: opening clients, ticking off tasks, replying to email, approving content, checking bookings. Only complex interactions (drag-and-drop kanban, wide charts) are more comfortable on desktop.