APK Installer by Uptodown

**What is Uptodown Installer for?**

Uptodown installer is a free tool that lets you install Android apps that use formats that are not detected by the default package installer included in the operating system. It uses the standard XAPK packaging to support the new APK distribution system used by Google, the so-called APK split.

This app works both ways so you can create backups of your installed apps and install the private copies in your smartphone, regardless of the packaging format.

**What features does Uptodown Installer include?**

■ Automatically searches for all the apps installed on your Android and creates back up copies.

■ Installs any APK or XAPK in your smartphone’s memory. You can forget about its internal structure - search, install and go!

■ Browses your smartphone’s folders using an integrated file browser

**Why is Uptodown Installer a must?**

The way to install and download apps has evolved over time. A short while ago, installing an app using an external APK involved simply clicking on it and letting the package installer included by default in your Android do all the work. This was true until the arrival of other standards that added complexity to the process.

.OBB data (a file that includes extra multimedia files within the app such as video or audio) turned out to be the way to exceed the maximum size allowed by Google for uploading APKs to its platform. That change complicated things when manually installing apps by having to install these additional files separately in specific folders on the device. Therefore, the most convenient solution was to insert the APK and OBB data into the same file and have it installed by an external tool. Thus, the XAPK standard was born.

Later on, Google started using a dynamic distribution system, the so-called Android App Bundle. When a developer publishes an app on Google Play, it is "disassembled" into several pieces called split-APKs. From then on, many apps consisted of a base APK and several others that included information related to the language of the app, the supported screen dimensions, and the required CPU architecture. Therefore, when a user downloads the app in question, they only install the "pieces" that are necessary for the app to work correctly on their device, saving bandwidth and costs for both parties, the user and the distribution platform itself.

Uptodown Installer’s main objective is to **make it possible for you to continue installing Android apps manually without having to do extensive research on file formats and destination folders**. When making backups, the app packs all these files (APK + split-APKs + OBB if any) into a single XAPK file. Therefore, when you install your private copies of apps you only have to find one file and install it without having to worry about formats and standards.

** Uptodown安装程序有什么用？**

Uptodown安装程序是一个免费工具，可让您安装Android应用程序，这些Android应用程序使用操作系统中包含的默认软件包安装程序未检测到的格式。它使用标准的XAPK包装来支持Google使用的新APK分发系统，即所谓的APK拆分。

该应用程序可双向运行，因此无论包装格式如何，您都可以创建已安装应用程序的备份并在智能手机中安装私人副本。

** Uptodown安装程序包括哪些功能？**

■自动搜索Android上安装的所有应用程序并创建备份副本。

■在智能手机的内存中安装任何APK或XAPK。您可以忘记其内部结构-搜索，安装并开始！

■使用集成的文件浏览器浏览智能手机的文件夹

**为什么必须安装Uptodown Installer？**

随着时间的流逝，安装和下载应用程序的方式也在不断发展。不久前，使用外部APK安装应用程序只需单击该应用程序，然后让默认情况下包含在Android中的软件包安装程序即可完成所有工作。在其他增加过程复杂性的标准到来之前，情况都是如此。

事实证明，.OBB数据（文件中包含应用程序中额外的多媒体文件，例如视频或音频）的数据超出了Google允许将APK上传到其平台的最大大小。当手动安装应用程序时，必须将这些附加文件分别安装在设备上的特定文件夹中，这将改变复杂的事情。因此，最方便的解决方案是将APK和OBB数据插入同一文件，并通过外部工具安装。因此，XAPK标准诞生了。

后来，Google开始使用动态分发系统，即所谓的Android App Bundle。当开发人员在Google Play上发布应用时，它会被“分解”为几部分，称为“分离式APK”。从那时起，许多应用程序由一个基本APK和其他几个应用程序组成，其中包括与应用程序语言，支持的屏幕尺寸以及所需的CPU体系结构有关的信息。因此，当用户下载有问题的应用程序时，他们仅安装应用程序在其设备上正常运行所必需的“组件”，从而为双方，用户和分发平台本身节省了带宽和成本。

Uptodown Installer的主要目的是**使您可以继续手动安装Android应用程序，而不必对文件格式和目标文件夹进行大量研究**。进行备份时，该应用会将所有这些文件（APK + split-APKs + OBB，如果有的话）打包到一个XAPK文件中。因此，当您安装应用程序的私人副本时，只需查找一个文件并进行安装，而不必担心格式和标准。