The Kaleider App makes it possible to experience much of the visual magic of the full Kaleider Windows program on an Android device. 

Kaleider App

The Kaleider App is entirely free, and includes no ad displays, data collection, tracking or other marketing gimmicks (see Privacy Policy).  It can be obtained through Google Play, the Amazon App Store, and various other app download sites.  The Kaleider app APK can be downloaded directly below:

Here is a brief summary of the Kaleider App features:

• Effects =>  Instantly generate a random effect by touching the Effect button.  Long-touch the Effect button (or touch the Options button ) to choose a particular effect from among the 203 available varieties (12 Kaleidoscopes, 41 Rectangle Mirrors, 33 Diamond Mirrors, 44 Right Triangle Mirrors, 46 Equilateral Triangle Mirrors, 11 3D Mirrors and 16 Funnels).  Also, the previously rendered effect can be re-rendered with the same parameters at its original position (before any Tile Shifting or Wandering movements).  And it's possible to re-render the last effect type with random variations.

• Tile Shifting =>  Touch and drag the screen to interactively shift rendered effect tiles.  Pinch with 2 fingers to Zoom in/out, or twist with 2 fingers to 'virtually' rotate the source image.

• Wander Effects =>  Wander can be activated to apply continuous automated motion to effects.

• Colors =>  Progressively shifts the colors of effect pixels according to selectable methods.

• 3D Rooms =>  Exhibits patterns in 3D perspectives, covering the walls, ceilings and floors of various Rooms.  The Rooms can be navigated via keyboard commands, or automated Roaming motion can be activated.

• Non-Flat Surfaces =>  Maps effect tiles onto a variety of curved Surfaces, resulting in non-linear distortions of the patterns.

• Auto Effects =>  Continuously generates random effects, periodically changing the source image.  Wandering motions, Colors, Rooms and Surfaces might also be randomly activated depending upon configured options.

• Save Effects =>  Rendered effects can be saved as JPEG or PNG images.

• Music Player =>  Kaleider effects can optionally be accompanied by music chosen from the audio files stored on your device.

• Options =>  Buttons are available to quickly perform most actions, and keyboard commands can be used if a keyboard is available.  Appearance Options can be set to hide the Android Status and Navigation bars, so that the entire screen is available for effects.

Kaleider App Version History

Version 5.1
• The app has been updated to comply with the most recent Android release, Version 14.0 (UpsideDown Cake - API Level 34).
• The C code for the Kaleider App has been reworked, and compiled with the latest Android NDK.
• Control of the Tile Zooming option has been fixed.
• Various other improvements and fixes.

Version 5.0
• A new category of effects has been added:  Equilateral Triangle Mirrors, which are rendered within an equilateral triangle shape.  46 varieties of these new Mirrors are available, some of which produce rather radical results.
• The app has been updated to comply with the most recent Android release, Version 13.0 (Tiramisu - API Level 33).
• Numerous other improvements and fixes.

Versions 4.8, 4.8.1 and 4.8.2
• Numerous updates were made to comply with the most recent Android OS versions.  Also the Java code has been converted to the more reliable and efficient Kotlin programming language.
• Extensive changes were made to minimize the possibility that the app will crash.
• 4.8.1 fixed more glitches that could cause crashes.
• 4.8.2 includes a major fix that should prevent most crashes.

Versions 4.7, 4.7.1 and 4.7.2
• The effect rendering routines have been entirely rewritten to enhance efficiency.  The app now uses less memory, and performance should be somewhat faster and more reliable on most devices.
• 4.7.1 fixed a glitch with scaling equilateral triangle based Kaleidoscopes and Funnels (anomalous streaks would appear).
• 4.7.2 corrected a screen resource that was missing with version 4.7.1.

Versions 4.6 and 4.6.2
• The Image Selection process now includes a Select Gallery Album option, which provides a list of Gallery folders to choose from.  Also, the Select Directory option has hopefully been made more efficient by excluding most images that wouldn't be appropriate for use by Kaleider (such as icons, thumbnails, buttons, etc).
• Now, when an image is chosen using the Gallery app, the Album that the image belongs to will become the current Image Source for the Kaleider app.  The Arrow buttons can be used to page back and forth through the images within that Album.  This should apply both when an image is shared to Kaleider from the Gallery app, or when the Gallery app is called from Kaleider (either by long-pressing the Image Selection button or by touching the Use Gallery App button).
• An Include Bubbles option has been added to Room Options (long-press the Rooms button).  That option can be un-checked to remove floating Bubbles from the 3D Rooms.
• 4.6.2 tightened up error checking to hopefully avoid crashes that could occur in some situations.  Also, a Privacy Policy has been included, which can be displayed from the app's Help function.

Versions 4.5, 4.5.1 and 4.5.2
• The Triangle Mirrors feature that was recently added to the Kaleider Windows program (see Kaleider 5.3) has now been included with the Kaleider Android app.  A large selection of Triangle Mirror Patterns are available, with 4 variations of each Pattern type to allow a choice of the desired orientation for the right triangle shape.  For example, choose the L/R version for a right triangle with the 90 degree angle at the Lower/Right.  Most Triangle Mirrors are perfectly symmetrical, and often quite intricate.
• Extensive internal restructuring to make the app more reliable and efficient, especially for 64-bit devices.
• 4.5.1 fixed crashes that occurred with some devices (my apologies!).
• 4.5.2 added the ability to 'virtually' rotate the source image by twisting a rendered effect with 2 fingers.  As before, pinching with 2 fingers will shrink/expand an effect.  If the effect description is visible, the rotate degrees or scale percent will also be displayed.  Touching and moving with a single finger will shift the effect tiles.  Several other fixes and tweaks.

Versions 4.4, 4.4.1 and 4.4.2
• More fixes and minor tweaks.

Version 4.3
• This version is primarily intended to fix occasional crashes.

Version 4.2
• The buttons panel at the bottom (or the side) of the screen has been removed, and now the Actions Panel at the top of the screen provides access to all Kaleider functions.  The Actions Panel will automatically adjust to one or two rows of buttons depending on the screen size, and   buttons might appear to access additional Actions.  The Actions Panel can be hidden by touching the icon at the top-left of the screen, and then restored by touching .  By default, the Actions Panel has a transparent background, but the Transparent Actions Panel setting in Appearance Options can be unchecked to make it a solid dark gray.
• Appearance Options now includes a Use Full Screen option to hide the Android Status and Navigation bars, making the entire screen available for effects.  A swipe near the bottom (or side) of the screen will briefly redisplay the Status and Navigation bars whenever needed.
• Appearance Options have also been added to better control the message text that can appear at the bottom of the screen.  Show Action Descriptions (on by default) will display the purpose of the last button touched.  Show Effect Descriptions (off by default) displays the last effect type that has been rendered.
• The Save function now provides a choice to save either an image of the currently displayed effect (as before), or a Tile image of the current effect.  Tile images can potentially be seamlessly tiled together to create larger images of any size.

Version 4.1
• Since Kaleider Plus is now free, the old Kaleider Free app has been discontinued, and Kaleider Plus is now called the Kaleider app.
• The interface has been redesigned.  The Tool Bar at the top of the screen is now transparent and overlays the displayed image.  The Tool Bar can be toggled on/off by touching the icon.  With the buttons panel also toggled off, the entire screen is available for displaying effects.
• The Image Selection process has been improved.  The icon can be long-touched to allow selection of an image from the Gallery (or some other image app), and there is also a Use Gallery App option in the Image Selection screen.  The SD cards on most devices will now be detected when selecting an Image Directory or a Music Directory.
• A Motion Control feature has been added to allow adjustment of the speed and smoothness of automated Wandering and Room Roaming actions.
• The graphics for 3D Rooms has been updated to possibly provide enhanced performance for newer, more powerful devices.

Version 4.0
• The Kaleider Plus app is now free!  The 2 apps will probably eventually be combined into a single app.
• Redesigned interface to replace text buttons with image buttons.  Buttons will occur in either 2 or 3 rows (or columns), as needed to fit within the screen size.  Button descriptions can be displayed whenever a button is touched (unless that option has been toggled off in Appearance Options).
• The sizing and positioning of effects has been improved to better adjust to different screen sizes.
• Now, when an Image Directory is selected, only directories that contain images will be listed, along with counts of the images stored within.
• An Audio Directory can also now be selected from a list of directories that contain audio files.  A particular song within a directory can be chosen and played.
• The Keyboard Commands have been changed so that the most common functions can be performed with numeric keys.  (Touch and Actions to show Keyboard Commands.)

Version 3.2
• Fixed crashes with 64-bit devices.
• Improved interface when using without a touch-screen.

Version 3.1
• Fix for Kaleider Plus crashes with license checking for Lollipop devices.

Version 3.0
• Improved Mirror rendering, and added 12 new pre-defined Mirrors.
• Added a Music Player to select and play audio files stored on your device.
• Added an option for Auto Effects on Current Image.
• Improved interface with larger button images and a Message line that can be toggled on/off.
• Several other enhancements and fixes.

Version 2.5
• Fixed Kaleider Plus 3D Rooms crashes that occurred with some devices.
• Other minor fixes and improvements.

Version 2.4
• Added the ability to Zoom effects via the touch screen.  Pinch inward to shrink, pinch outward to expand.
• The Kaleider apps will now be included in the Share Menu of the Gallery (and any other apps that can share images).  This makes it possible to use the Gallery as an alternative means of selecting an image for use as the source for Kaleider effects.
• Corrected the Date and Time stored with images saved by the Kaleider Plus app.
• Fixed a serious glitch with certain images that would cause rendered effects to appear mostly black.
• Replaced the ActionBarSherlock library with the Google supported ActionBarCompat library.  (Much gratitude still to Jack Wharton for the excellent interim solution of ActionBarSherlock.)
• Several other minor fixes and improvements.

Version 2.3
• Better offline License verification (Kaleider Plus).
• Other minor fixes and improvements.

Version 2.2
• Fixed lockups and display glitches that occurred with certain devices.

Version 2.1
• Fixed a fairly serious glitch with displaying small images (sorry!).

Version 2.0
• Added an Action Bar and other interface enhancements.
• Improved support for tablet devices.
• New Cone and Spike Funnels.
• New Pyramid and Carousel Rooms (Kaleider Plus).
• New Knolls, Queaser and Wings Surfaces (Kaleider Plus).
• Fixed several glitches.

Version 1.1
• Fixed occasional crashes.
• Significantly faster performance.
• Improved Non-Flat Surfaces rendering (Kaleider Plus).
• Several interface improvements.

Version 1.0
• Initial release.