My school district utilizes HMH Journeys as our reading curriculum. One of the components that we have access to is called ThinkCentral. This is basically an online portal to access digital versions of the curriculum. One nice feature of this tool is the ability to add classes and students as well as give assignments.
iPad vs Learnpad
With assessments being a great tool to inform instructional decisions, I would give an edge to the LearnPad on this head to head comparison for integrating assessments with HMH Journey's ThinkCentral.