
Soomla is a two-side product for mobile app publishers:
1-st side: tools to understand and improve your ad monetization - very useful especially for developers that are new to ad monetization; most of these services have no direct alternatives and make developers' first steps much easier, so it's really great.
2-nd side: tool for competitor analysis (UA and creatives intelligence); it's a different story, because there are a lot of services with similar functions, yet Soomla provides some unique data that no one else has (like CTR for creatives). Review collected by and hosted on G2.com.
Can't say that all Soomla services will provide you the best UX.
Also, there would be almost no info related to Facebook Audience Network (because of FAN's policies, so no one has it either). Review collected by and hosted on G2.com.

