sideload

Sideloading refers to installing applications from sources other than a device’s official app store or distribution channel. It typically involves obtaining an installation package from a third party, transferring it to the device, and approving the installation. Sideloading contrasts with the standard process of obtaining software through sanctioned stores that perform security reviews and automated updates.

On Android, sideloading commonly uses APK files. Users may enable installation from unknown sources or per-application permission, then install the APK. Sideloaded apps may not be covered by Google Play Protect and can present security risks. For developers and testers, sideloading provides access to pre-release builds or apps not yet published.

On iOS, sideloading is more tightly regulated. End users generally install apps through the App Store; sideloading can occur via developer provisioning, Xcode deployment, enterprise certificates, ad hoc distributions, or jailbreaking. These methods are subject to platform restrictions and can violate terms of service, with certificates or access potentially revoked.

In other environments, Windows and other desktop ecosystems permit sideloading of non-store software, often via developer mode or traditional installers.

Reasons for sideloading include access to apps not available in a region, beta testing, corporate internal apps, or devices with restrictions that block official stores.

Risks include exposure to malware, privacy and security concerns, lack of automatic updates, and potential system instability. Some platforms may revoke certificates or impose penalties for unauthorized sideloading.

Best practices include obtaining software from trusted sources, verifying signatures when possible, keeping devices updated, and disabling sideloading when not required.