The TagTime Android app has options for saving/exporting one’s log file that made sense in like 2009. I would not be surprised if there’s no way to export logs from the Android app on a modern phone.
I’ve lost track of what you’re doing with the Android app though. Probably not for sanity checking the universal ping schedule but just in case, here’s the thread documenting the official reference implementation:
See also https://tagtime.glitch.me
I’m imagining a SaaS that basically centralizes your TagTime log so you can answer pings on different devices and then log in to the app and see all your pings, export them, etc.