HelpStack is an Open Source Mobile Help Framework that supports your iOS and Android app users. Let customers report issues from within the app and have relevant tickets created for each. Have real-time conversation with your users without having them to leave the app. Customers can attach screenshots from their mobile gallery to help you diagnose and fix issues faster. Device and App information gets automatically embedded in every user message. HelpStack screens are totally customizable. Change the color and font of HelpStack to reflect the look and feel of your app.
Apptentive hasn't revealed their pricing on their website. However after going through few third-party sources, it was found that Apptentive is priced at about $299 for an unlimited number of transactions. It also offers a free plan that allows up to 10000 active users per month.In-App User Feedback Tools Apptentive