For users seeking a secure, open-source, SPICE and SSH Remote Desktop solution for QEMU KVM virtual machines, aSPICE offers an excellent choice. Not only is it available for Android, but iOS and Mac OS X users can now enjoy its benefits through aSPICE Pro, available at this link. By purchasing the donation version, aSPICE Pro, you can directly support the ongoing development and maintenance of this GPL open-source software. If you encounter any issues, please use the "Send email" button in Google Play to report them directly to the developer before leaving a review.

Stay updated with the latest releases by checking out the release notes at this GitHub link. For those interested in older versions, they are accessible at this releases page. Should you encounter any bugs, you can report them at the issues section on GitHub. For questions or discussions, consider joining the conversation on the forum at this link instead of posting in a review.

If you're also interested in VNC viewing, check out bVNC, another great tool by the same developer, available at this Google Play link. For users experiencing issues with mouse pointer synchronization, consider using the "Simulated Touchpad" input mode, or better yet, add an "EvTouch USB Graphics Tablet" to your virtual machine. To do this, follow these steps:

• If configuring through virt-manager, go to the View->Details section, and select Add Hardware->Input->EvTouch USB Graphics Tablet.
• If running your virtual machine on the command-line, use an option similar to: "-device usb-tablet,id=input0".

aSPICE is a robust, secure, SSH-capable, open-source SPICE protocol client that leverages the LGPL licensed native libspice library. Its comprehensive features include:

• Control over any SPICE-enabled QEMU virtual machine, regardless of the guest OS.
• Master password support in aSPICE Pro.
• MFA/2FA SSH authentication in aSPICE Pro.
• USB Redirection in aSPICE Pro.
• Audio support.
• Multi-touch control over the remote mouse, with one finger tap for left-click, two-finger tap for right-click, and three-finger tap for middle-click.
• Sound support (configurable in Advanced Settings on the main screen).
• Right and middle-dragging without lifting the initial tapping finger.
• Scrolling with a two-finger drag.
• Pinch-zooming capabilities.
• Dynamic resolution changes, allowing desktop reconfiguration during connection, and control from BIOS to OS.
• Full rotation support, with central lock rotation on your device to disable rotation.
• Multi-language support.
• Full mouse support on Android 4.0 and later versions.
• Full desktop visibility even with the soft keyboard extended.
• SSH tunneling for enhanced security or to access machines behind firewalls.
• UI optimizations tailored for different screen sizes, suitable for both tablets and smartphones.
• Samsung multi-window support.
• SSH public/private (pubkey) support.
• Importing encrypted/unencrypted RSA keys in PEM format, and unencrypted DSA keys in PKCS#8 format.
• Automatic connection session saving.
• Zoomable, Fit to Screen, and One to One scaling modes.
• Two Direct, one Simulated Touchpad, and one Single-handed input modes.
• Long-tap to access a variety of clicks, drag modes, scroll, and zoom options in single-handed input mode.
• Stowable on-screen Ctrl/Alt/Tab/Super and arrow keys.
• Ability to send the ESC key using your device's "Back" button.
• Support for using the D-pad for arrows, with rotation options for some Bluetooth keyboards.
• Minimum zoom that fits the screen and snaps to 1:1 while zooming.
• FlexT9 and hardware keyboard support.
• On-device help for creating new connections and understanding input modes accessible from the Menu.
• Compatibility with Hackerskeyboard, recommended for use (available on Google Play).
• Import/Export functionality for settings.
• Samsung DEX, Alt-Tab, Start Button, and Ctrl+Space capture capabilities.

Future plans for aSPICE include clipboard integration for seamless copy/pasting from your device. For detailed setup instructions on Linux, refer to the resources provided by Red Hat at this link and by Ubuntu's Canonical at this link. The source code for aSPICE can be found at this GitHub repository.