Even if a patched APK is "clean" of malware, it rarely offers a smooth experience.
You cannot update the app through official channels. As Android OS versions update, the patched app will eventually become unstable or crash.
When users bypass payment, they deprive the developers of the revenue needed to improve the tool.
While the lure of "everything for free" is strong, the risks of downloading a patched APK far outweigh the benefits. Between the threat of identity theft and the potential for a broken app in the middle of a hike, the safest and most ethical path is to either use the free version of the software or invest in the developers who keep the trails mapped and safe.
Apps like Organic Maps or OsmAnd provide high-quality offline mapping and trail data for free, using OpenStreetMap data, without the need for risky "patches."