If you're looking for a Fleksy alternative, Microsoft SwiftKey is a top choice. It offers customizable keyboard options like typo correction, swipe typing and word prediction on Android and iPhone devices, and supports multiple languages. It also comes with hundreds of free keyboard themes, and developers can use it as a foundation for their own projects.
Another Fleksy competitor worth checking out is ClusterDev, a suite of language products that aims to help people communicate in their native language. It includes Vernacular Keyboard Apps that use transliteration and speech-to-text technology, accompanied by a range of stickers and GIFs. The platform integrates with any app on the phone and could be a good choice as an all-purpose communication tool.
If you're looking for something more geared toward productivity, check out Slate. Slate is an AI-powered mobile keyboard that turns your phone into a content creation powerhouse. It's good for productivity on the go, letting you get laptop-like writing, note-taking and creative work on your mobile phone.