I have been able to download a .tpk file to my iPhone. However, I'm unable to bring it up on the Survey123 App map. After reading multiple questions and blog posts surrounding this workflow I'm still at a loss. There are two things I'm seeing that could possibly be a problem.
1) After changing the .info JSON file as described in this workflow: Prepare basemaps for offline use—Survey123 for ArcGIS | ArcGIS the .info file gets overwritten when you hit the Publish button within the Survey123 Connect for ArcGIS desktop app. Is there a work around for this? It seems that the Publish button is reading the XSForm or something similar to determine what the .info file should be and then re(creating) it.
2) I do not see the map on my Survey123 app (on my iPhone) at either Settings/Storage/View Map Library or in the survey's dropdown menu of basemap choices (Map Types).
Since I downloaded the .tpk file through my Firefox App on my iPhone it's in a Firefox/Downloads folder. How would the app know to look here and if it doesn't how do I get the file to the right place on my iPhone?