Offers in-app purchases

Discover the latest solar events by accessing up-to-date high definition pictures taken by the best solar observatories.

Create your own videos of Sun evolution for the time interval (of up to 30 days) that interests you.

Collect the best images and videos in your Helios gallery and share your discoveries.

What is Helios?

Helios is an unofficial client for Helioviewer Project. Helioviewer.org is an open-source project for the visualization of solar and heliospheric data which is funded by ESA and NASA.

The app provides easy access to up-to-date and archived image data offered by Helioviewer.org servers.

No ads, no user data collection. Free for the first 15 days of usage, with all the available features.

Helios can download images from 35 solar image sources.

Several of these sources are offering up-to-date images, taken daily or multiple times per day.

All of the sources are also providing archived images going back several years.

Create movies with Helios

You may also request the Helioviewer.org server to process a short movie of the Sun evolution over a set interval of up to 30 days. The time interval can be as recent as the past day or week or can be several years old.

The movie request is processed by the Helioviewer.org server. After the movie processing is completed, it will be downloaded on your device.

You can save the images and movies in the app gallery for later viewing and sharing (they can also be accessed by other programs).

The gallery can be kept on the SD Card.


The app does not collect any info from your device and has no impact on your privacy. Internet access permission is only used for downloading files from Helioviewer.org

The images are provided by the Helioviewer.org server in the highly compressed JPEG 2000 format. It takes several seconds to decode them before displaying.

The movies are created by the Helioviewer.org server upon request. That means that you will have to wait until the movie will be processed and downloaded. If there are other requests waiting to be processed, your own request will be placed in a waiting queue. Because of this, your movie requests will be executed in an interval varying from 2 minutes to half an hour or more.

Please note that Helios is just a client app and its performance depends on the behavior and performance of the Helioviewer.org servers.
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What's New

Solved Helioviewer API access for Android versions 4.x
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Additional Information

November 12, 2016
Current Version
Requires Android
4.0.3 and up
Content Rating
Interactive Elements
Users Interact, Digital Purchases
In-app Products
$0.99 per item
Offered By
Serbanescu Adrian-Liviu PFA
Ion Creanga 52, Alexandria, Romania
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