The free version of the Jesus Calling Devotional app can be downloaded from the Apple App Store. The app was developed by HarperCollins Christian Publishing, and its official name on the App Store is Jesus Calling Devotional by Sarah Young Lite.
Though the Lite version of the app is completely free, it is limited to include only a full week's worth of devotionals and is intended to be a trial version of the paid app. Otherwise, users have access to all of the features of the paid app, which includes the option to share devotional excerpts on Facebook and other social networking platforms and the ability to keep personal notes for each devotional. Users who want to receive the full collection of devotionals can upgrade to the paid app.
As of March 2015, neither the free version of the app nor its premium counterpart are available on non-iOS devices.