The issue with IPSOS app and using the browser interface is that separate versions are kept. If you do part on the app, and it is synched, then fine. But if you do part or all on the browser version, then go to the app, you will be informed that you have two versions and which one do you want to keep.
So I complete as much on the app as I can (mostly image upload and data entry) and finish with any comments on the browser. I can then save a copy of the report there, then submit.
Do not read so much, look about you and think of what you see there.
Richard Feynman-- letter to Ashok Arora, 4 January 1967, published in Perfectly Reasonable Deviations from the Beaten Track (2005) p. 230