Security firms like Kaspersky and McAfee have flagged hundreds of "RAM expander" APKs as malware. Because these apps require extensive permissions (Accessibility, Overlay, Storage), hackers use them to:
(often called Swap or ZRAM on Linux) is a software trick. It sets aside a small portion of your phone’s internal storage (UFS or eMMC flash memory) to act as overflow RAM.
Remove bloatware. Uninstall Facebook, Messenger, and Instagram. Install "Facebook Lite" and "Messenger Lite." They use 90% less RAM. This frees up physical RAM instantly without any virtual trickery.