In terms of market share, Observer is clearly lagging behind, losing to PercentMobile in all segments.
PercentMobile has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, People & Society, Shopping and 48 other categories.
Observer is leading in Computer & Electronics, Software, Photography, Transportation & Logistics and 6 other categories.
PercentMobile is leading in most countries, including United States, Indonesia, India, Germany and 18 other countries.
Observer is leading in Russia, United Kingdom, Netherlands and Sweden.