Appgain is a Customer Engagement solution that helps businesses with marketing in an All-in-One tool. The software can be deployed via Apple SDK, Android SDK, iOnic SDK, Web SDK, ReactNative SDK, Shopify, Flutter, or Unity. The main features of Appgain include uninstall tracking, omnichannel messaging, re-marketing, mobile landing pages and deep links, marketing automation, and audience engagement tracking. Appgain subscriptions are offered on a monthly basis and support is provided via phone, chat, and FAQs.