@slarti76Petr periodically updates available HGT files, so they are not exactly the same. But resolution remains the same. We still do not have a mechanism for updating of these files on devices and also do not have a system to offer download more detailed elevation files. Because they are a lot bigger, it may need some "chooser" in the app UI.
Regards quality ... I think it worth it's 25MB. You may compare results on "fill elevation" over some route in mountains. The difference may be huge. And 5-15m difference on the peak? It's better than I should expect

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And GPS stuff ... sure, it break recording, navigation atc. when the screen is turned off or the app is minimized. Unfortunately Android 10 and mainly new Android 11 hide option to use GPS always a little more, so I was forced to request "Use only when visible" at the start and "Use always" a later when any feature really needs it (like track recording).
@tapiowell, I wasn't able to simulate this problem yet ...