Navigation

Moving and zooming the image

Use the following gestures to navigate the image:

Real-time zoom video

Enjoy real-time zoom video:

You may change auto-zoom options (including zoom speed) in the Settings / Auto zoom.

You may start real-time zoom-in into the spot saved in the gallery (built-in or your favorite). Long press a spot in the gallery and tap Zoom video item from its context menu.

The app can automatically adjust coordinates when zooming in to avoid entering areas with little detail (where iteration count does not vary). You may switch this feature on/off using the Settings / Auto zoom Auto guiding option. This is an experimental feature not working perfectly yet.

Because the image is rendered on the fly, its quality during auto-zoom strongly depends on its complexity (mainly on the iteration count) and the auto-zoom speed. When the quality is reduced, it is displayed in the status bar.

Zoom-in stops when the maximum zoom ratio for the fractal type is reached. Zoom-out stops when the default zoom ratio for the fractal type is reached. When zoom-out is started at the default (or lower) zoom ratio, it stops when the minimal zoom ratio of 0.01 is reached.

Deep zoom

Above a certain zoom level (around 5e+12 depending on the screen size) the app enters the deep zoom mode and starts using custom floating-point numbers. This significantly slows the computation and results in reducing the image quality.

The higher the zoom is the longer numbers are necessary (up to 1024 bits long) and the slower the computation is. Zoom is limited to 1e+300 but when you exceed 1e+100 the computation can take some time and you may need the patience to get a full quality image. Fortunately, there are lots of interesting spots at much lower zooms.

Deep mode is indicated in the status bar. In the Advanced mode, the status bar also shows the length of currently used floating-point numbers.

Deep zoom is not supported for all the fractal types. It is currently supported for 25 of them. It is not yet supported for custom fractal types.

Image rotation and stretching

The pinch mode button icon indicates the current pinch mode. The default mode is zoom .

Use this button to display the pinch mode menu and choose one of the available options:

Zoom Pinch to zoom in and out (default setting).
Rotation Use two fingers to rotate the image. The current rotation angle (in degrees) is displayed in the pinch mode menu.
Long press the menu item to input the desired value using the keyboard.
Stretch Pinch to distort the image by stretching or squeezing it in one direction. The current stretch factor is displayed in the pinch mode menu. The maximum stretch factor is 100 and further stretching is not possible. Stretching the image may change the zoom.
Long press the menu item to input the desired value using the keyboard.
Reset Remove stretch and rotation from the current image and switch back to zoom pinch mode.


An example result of stretching a Burning ship fractal zoom.

Rotation and stretching are freely available for Mandelbrot Set fractal. Unlock Premium to use it for other fractals.

Distraction-free mode

Use the visibility button to enter the distraction-free mode. The scroll bar and the buttons will be hidden, but you can still navigate the image. The visibility button will be still available and you can tap it again to restore the scrollbar and buttons.

Admire mode

The app automatically hides the scrollbar and buttons after a specified time without user interaction. The default time is 30 seconds but you may change it (or turn it off) in the Settings / Appearance. Tap the screen or pan/pinch the image to leave the admire mode and restore the scrollbar and buttons.

Back button

On the app's main screen, you can use the device's back button to undo your changes. Any change in the position, zoom ratio, or parameter value is stored and you may use the back button to go through previous images within the current session. Subsequent taps on the scrollbar's forward or back thumb are treated as a single change.

You may turn off this feature and restore the default back button action using the Settings / Behavior Back button navigates option.

On any other screen, the back button normally returns to the previous screen. There is no back or close button to save precious space on a mobile device. The exception is the tutorial screen where the back button returns to the previous page and you can use the close button to exit the tutorial.

Status bar

By default the status bar is hidden and rendering progress is indicated only by a progress bar displayed on the top of the screen. Use the Settings / Appearance Show status bar option to make it visible.

The status bar displays the zoom ratio and iteration count range for the current image. When rendering, it displays also the current quality, rendering progress and estimated time remaining.


An example status bar while rendering a deep zoom image.

Use the Settings / Appearance Show coordinates option to make the status bar displaying the current coordinates. In the deep zoom mode, only approximate coordinates are displayed.

Action menu

Use the menu button to display the app's action menu:

Quit Leave the app.
Unlock Premium Unlock Premium features.
Add to Favorites Add the current spot to the Favorites.
Share Location Share the current spot.
Share Image Share the current current image.
Save Image Save the current image to the device's gallery.
Import File Import shared content from a file.
Tutorial Show this tutorial.
@MandelBrowser Go to the Instagram app profile.
Settings Change the app's Settings.