I inspect with Total for Mobile on an iPad mini and take all my photos of the subject with it (which matches/labels the room and or comp), but also try to take the same photos and extras with a Canon PowerShot something (used to be able to get them refurbished for $60 or $70). I take comp photos with Total for Mobile on my Samsung Galaxy S10 because it has the comps mapped and you can activate the camera from the map. If I see some listings or other miscellany, I photograph with the Canon. Back at the office, I uploand to cloud/download to desktop the iPad mini file, then merge the Samsung file into that, leaving a report with all subject and comp photos. If the subject photos are not good enough, I drag in one of the redundant photos from the Canon.
When I deliver the completed report, I delete the cloud files and the mobile files from the iPad and phone. Until that point, I have a lot of redundancy with little cost and no loss in quality. I probably have less than $500 in a couple of iPads, a phone, and a few refurbished Canons, and all can be switched in or out without any loss in efficiency in the event of a failure.