Ill try most anything "batch processor" for the iPad. I tried this app, and its wasnt good for my needs.
The issues: Regardless of the order you tap photos to select them, this app processes them in random order.
And: its image dimension limit is 2048x2048 pixels.
Its a non-updated 2013 app, so Im not mad and I dont feel gypped; I just want to make potential buyers aware of these limitations if it matters to them.
ruskoberger.com about Reduce - Batch Resize Images and Photos for iPhone & iPad, v1.1.1