AR overlay of the sun's path at solstices, equinox, and now on your camera
About this app
Heliodos is an augmented reality (AR) app that overlays the sun's trajectory onto your live camera feed, so you can see exactly where sunlight will fall at any time of year — right through your phone's viewfinder.
Stand in your garden, on a building plot, or any outdoor space, point your camera at the sky, and instantly see the sun's arc for the summer solstice, winter solstice, equinox, and the current date and time — including any obstacles in the sun's path.
Features
• AR sun trajectories: The sun's path for the solstices, the equinox, and the current moment are drawn directly over the live camera image.
• Flexible location: Uses your GPS location automatically, or lets you set any place on Earth manually.
• Custom time: Simulate the sun's position at any time of day, not just right now.
• Camera selection: Pinch to zoom to cycle through available back cameras (wide-angle, normal, telephoto).
Use cases
• Gardening: Find out which spots get full sun in summer versus winter before you plant.
• Real estate: Check how much natural light a room or terrace receives throughout the year.
• Architecture & construction: Plan shading, windows, and solar panels with real-world sun data.
• Photography: Scout locations and predict golden-hour angles in advance.
Heliodos requires camera and location permissions to function. No data is collected or transmitted.
Licensed under GPL-3.0-only, by Daniel Kraft.
What's New in v1.0.0
Imported from the F-Droid repository index.
- Initial release of Heliodos.
- Features:
- - AR overlay of the sun path and position over the camera feed
- - Shows sun paths at solstices, equinoxes and the current date/time
- - Location from GPS or custom set to any place on Earth
- - Current time or custom set time
Version history
May 14, 2026 · 3.3 MB · Android API 24–34 · code 1
Imported from the F-Droid repository index.
- Initial release of Heliodos.
- Features:
- - AR overlay of the sun path and position over the camera feed
- - Shows sun paths at solstices, equinoxes and the current date/time
- - Location from GPS or custom set to any place on Earth
- - Current time or custom set time
SHA-256 33c0ceca157b3adbec0ffac650aabdcfd8f18df4f5e847901304b450c8121dbe
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be eu.domob.heliodos is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
No earlier build is on record for Heliodos, so there is nothing to roll back to yet. When a second version is published, this section will explain how to move between them safely.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Heliodos, and a listing is removed when the evidence for it stops holding up.
Get Heliodos
Every source we list for eu.domob.heliodos is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
33c0ceca157b3adbec0ffac650aabdcfd8f18df4f5e847901304b450c8121dbe
Signing certificate
4e7a6da8f67175d9c1d973d34ab82adaa66a68f4961b251335a5ed91512aedce
Permissions Required
Previous Versions
No earlier build is on record — this is the first release we have listed.
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
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