Use online scanners like VirusTotal (upload the downloaded .apk file) or install Kaspersky/Hyperion on your device. Look for detections like:
Fluttermare is an indie roguelike deck-building game blending fast, tactical card combat with a whimsical, spooky art style. Players explore procedurally generated dungeons, collect and upgrade cards, and face unique enemies and bosses while managing risk and reward through branching choices and relic-like modifiers. fluttermare apk 130 for androidapk upd
Since the exact file is niche, try:
Avoid: File-hosting sites with excessive pop-ups, URL shorteners, or “APK downloader” generators that ask for your device ID. Use online scanners like VirusTotal (upload the downloaded