Spark also has the flaw of being MacOS and iOS only. Sadly I need Android, Windows and MacOS at the very least but I'm much more comfortable knowing something i

Spark also has the flaw of being MacOS and iOS only. Sadly I need Android, Windows and MacOS at the very least but I'm much more comfortable knowing something is fully cross-platform wherever possible. Realistically this means browser + Android native + iOS native (unless the browser version is extremely well coded and runs satisfactorily on a mobile browser)