You can switch between Applications view and Favourites view with Joystick Left and Right.

If you often compress/decompress any custom files/folders you can define a group including any number of such files and folders. The whole group can be compressed/decompressed with one key press. E.g. you can define groups 'My pictures', 'My videos', etc.

In this view you can see how much space a group (all its files and folders) uses now and if the group is compressed it shows how much space was saved (displayed in brackets) and its compression rate.

In addition to Favourites view Stacker includes built-in file FileBrowser. It allows you to compress/decompress any file on your device in some key presses without adding it to groups, etc.

Stacker is fully customizable and you can define how it will look and act. In look and feel settings you can define which layout and performance will be used while compressed app is being started and when compressed app is being closed and recompressed.

There are five types of progress indicators available:

• Caption indicator - Small indicator displayed in the caption area.
• Bottom indicator - Small indicator displayed in the bottom of the screen.
• Classic progress - Classic progress bar on the bottom of the screen.
• Caption pie - Small pie styled progress displayed in the caption area.
• Bottom pie - Small pie styled progress displayed in the bottom of the screen.

There are two performance options available:

• Best speed - compressor is optimized for high speed.
• Background - compressor is optimized for multitasking, so while compressing/decompressing you can work with your device almost without noticeable performance lost and without limitations.

Default settings: when application is being started it uses high speed settings and classic progress layout, when application is being closed and compressed again it uses background settings for speed and small caption indicator.

Here you can also specify whether Stacker should change an application icon or not. BTW, if you don't want Stacker to patch application icon you can save an additional 1-2 kB per each application.

• Application Run application command - starts selected application
• Application Application info command - shows info about selected application. Here you can see application type, how much space it uses now, if the app is compressed then how much space it used in original state, how much space was saved by compressing this app and its compression rate.
• Application Add to favourites command - adds selected application to system favourites (PinBoard)
• Misc Memory, disks info command - shows free memory, space left on disks and total information about compressed applications.
• Misc Add to favourites command - adds Stacker itself to system favourites.

• To keep your data in smaller forms we use industry standard LZ77 compression algorithm. The one all ZIP programs use.
• Stacker doesn't have an memory resident module that always runs when the system works. Stacker's compressor is loaded only when it is needed (to compress or decompress app) and unloaded immediately after the work is done. Hence Stacker doesn't waste valuable memory, doesn't slow down the whole system, and doesn't provoke batteries to discharge faster.
• Stacker not only saves your disk space it compresses device memory as well when any compressed application starts or finishes. That keeps maximum amount of memory everytime you work with your device!
• Intellectual rollback if there was any error while compressing/decompressing (out of disk space, etc). That gives you reliable and fail safe work with your device.
• Automatic recovering if you have upgraded/deleted the compressed application without decompressing it first. So no need to think whether your application was compressed or not before upgrading it, Stacker will care about it for you automatically!
• If you start a compressed program and then power off or restart your device without closing the program (and decompressing it) then you can simply start Stacker and it will automatically compress all programs that remain uncompressed because of restart automatically.
• When an application is being compressed or decompressed you can meantime work normally with your device. But if you try to start this app you'll get 'App is busy' message. It's not an error, it's the message to you that the compressor is already working on this application. But there are no limitations to other applications, you can start/close as many compressed applications as you want at the same time. Our compressor can handle multiple requests.