GravLens3 4+

Eli Rykoff

Designed for iPad

    • 3.7 • 6 Ratings
    • Free



Gravitational lensing is a remarkable astrophysical phenomenon, where the light
of a distant galaxy is bent by a massive foreground galaxy.

Now you can simulate the effect of a gravitational lens on your iPhone or iPad!

With GravLens3, a remarkable and educational tool you can:

* Simulate Hubble Space Telescope images of strong gravitational lenses
* Adjust the size and ellipticity of the lens model
* See the distortion on a picture from your photo library or camera
* Save the image, tweet it, post to Facebook, or print it
* Live View: view the world through a gravitational lens! Real-time lensing with your camera.
* Airplay and external monitor support. Broadcast your lensing to an external projector or Apple TV. Great for lectures!
* Retina display, iPhone 6/6 plus all supported.

What’s New

Version 3.2

This app has been updated by Apple to display the Apple Watch app icon.

Camera now works on iOS8 + iPad

Ratings and Reviews

3.7 out of 5
6 Ratings

6 Ratings

JoshuaW6870 ,


This app is a great demonstrator for gravitational lensing

A. Designer ,

Needs an update for ios 11

This is a fantastic app when it works - but it doesn't save your edits reliably. It keeps saving the unedited source.


11/18: iOS 12.1 on a new iPhone X - still isn't working properly. It allows you to manipulate the image to your heart's content, but will not save anything but the source image. Very disappointing. Used to be a great app.

CptSteiny ,

Excellent app

Does exactly what it says. Yes, it is somewhat like some Photoshop effects, but this is real physics. And cool physics at that!

App Privacy

The developer, Eli Rykoff, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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