Is appboy.com Safe?

From their LinkedIn page, ***** , "Appboy empowers mobile marketers to build better relationships with their customers. [...] We built the world’s best intelligent CRM so marketers can connect human-to-human, at scale, with their customers, driving deep engagement and ROI." In other words, it's a user tracker specifically targeted at mobile (phone, tablet, etc) app users. I wasn't able to determine if it tracks users across mobile apps, but phrases from LinkedIn that say, "The center of our platform is the holistic user profile that offers a single view of the customer." and "Thousands of global marketers use Appboy to power over a billion user profiles worldwide." makes me think they can/do. Appboy is also very, very big into mobile push notifications, which are those often highly-annoying texts, notifications or banners in apps that seem to love to obscure the content I'm trying to see. Topics for some of their LinkedIn posts are: "What Everybody Should Know About Push Notifications," "Don’t Give Up On Push: 6 Steps to an Effective Re-Permission Campaign," and from their starter kit page ( http://try.appboy.com/gc_customer_loyalty_bundle/ ), "Two in-depth guides on how push notifications and in-app messages can boost engagement" To their credit, they seem to be trying to get advertisers to do a better job with them as in what type of notifications a user prefers, how long to make the text and the best time to deliver it. I think the bottom line is that they sell a product that attempts to help other app makers retain users. It's been measured (and seems to hold true at least with me) that 80-90% of apps downloaded are at first rarely and then never used. Appboy is trying to fix that. What I believe is that the appboy content is trying to track you, but rather than serving ads, they serve notifications (email, text, phone screen, etc.) from an app you already have installed. That could be beneficial ("We'll give you an extra 5% off everything that you put in your cart yesterday, but didn't buy!") or annoying (Email an hour after you closed the app : "There's stuff in your cart!", text immediately after you close the app: "There's stuff in your cart!", phone notification repeating every two hours: "You didn't complete your purchase!") I'm going to allow this one. Since this would only come into play in a mobile app I've already downloaded and installed, I am obviously interested in the content, and having a service that makes the app more useful to me sounds good on the surface.