The document discusses the debate between developing mobile applications as native apps or browser-based HTML5 apps, noting that native apps have more functionality but higher costs while HTML5 aims for "write once, run anywhere" but has varying browser support; it reviews the pros and cons of each approach and examines the fragmentation of devices, browsers, and HTML5 feature support across platforms, concluding that true cross-platform support does not currently exist and multiple versions may still be needed.