I'm a long-time user of USTopo. It provides a selection of maps that meet my needs, permits uploading track plans and other data, records our tracks to be saved for later review, and I could depend on it's battery to give me a full day's use on a Samsung S10 Ultra.
A year ago I found that GAIA has those features and more, so that it works better for me than US Topo, thus I began using it to track our weekly hikes. But ... I soon learned that I could not get a full day's activity with GAIA on the daily charge of the battery. To verify my ad hoc observations, for a half dozen hikes for each app I retrieved percent use of battery and run time. From these measurements I learned that GAIA uses up to twice as much battery power as USTopo, or an average of 1.8 times more power over those 6 samples.
Overall GAIA provides features that I prefer over USTopo, but its greater use of battery power causes me to relegate it to planning (for which it is the best - thanks for the great product in this respect). I would gladly make GAIA my Go To app for hiking if you can improve its efficiency in its use of battery.
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