Helios — Solar Sun Path AR

Hellwarp

Contains adsIn-app purchases

About this app

Helios is an augmented-reality solar planner. Point your phone at the sky and watch the sun's path overlaid on what your camera sees — today's arc, the summer and winter solstice extremes, and the moon's nightly journey.

Thinking about solar panels? The question that matters most is: where will the sun actually shine, and where will trees, buildings or terrain get in the way? Helios answers it — and tells you what your roof is really worth.

▸ AR SUN PATHS
See where the sun rises, peaks and sets — overlaid live on the world through your camera. Sweep across your roof or garden and watch today's, the summer and the winter sun paths in their real positions.

▸ MAP YOUR SHADE
Pan the camera across the sky and Helios builds an obstruction map of your site. Trees, buildings, terrain — anything in the sun's way gets tracked, and the parts of the sun's path they block turn red.

▸ HONEST SOLAR ESTIMATES
Helios doesn't quote you a sunny-day fantasy. Yield estimates are weather-adjusted using 20 years of NASA satellite measurements for your exact location — realistic numbers you can hold up against an installer's quote, anywhere on Earth. Want the theoretical ceiling instead? Flip to the clear-sky view with one tap. Adjust panel tilt and facing with sliders, watch the month-by-month report update live, and compare your setup against the shade-aware optimum for your exact site.

▸ NOT JUST FOR SOLAR
Photographers — find golden-hour light for any spot before you set up. Gardeners — see how many hours of direct sun a bed, balcony or greenhouse really gets. Stargazers — follow the sun's elevation and azimuth, and the moon's path across the night sky.

▸ EXPORT AND SHARE
Export the report as a one-page PDF for proposals, or a portrait image for messaging. Solar contractors, this is for you.

▸ MULTIPLE SITES
Sites are saved automatically. Name them ("Home", "Customer X's roof"), revisit anytime. Free keeps your 3 most recent sites unlocked; Pro unlocks unlimited sites — one-time purchase, no subscription.

▸ PRIVATE BY DESIGN
Everything stays on your device. No servers, no accounts, no tracking. Even the NASA climate data ships inside the app.

▸ WORKS OFFLINE, WORLDWIDE
GPS, camera and sensors are all Helios needs. Scan a roof in Dublin, Phoenix, Johannesburg or Tokyo — the physics and the climate data cover the whole planet, no signal required.

▸ WHO IT'S FOR
Homeowners sizing a PV system. Solar installers making proposals. Photographers chasing light. Gardeners planning beds. Anyone who's ever asked "how much sun does this spot actually get?"

App available in English, German, Spanish, French, Italian and Portuguese.

Made by Hellwarp.

What’s new

• Estimates are now weather-adjusted using 20 years of satellite data for your exact location — realistic numbers you can compare with installer quotes, anywhere in the world.
• New toggle: switch between typical weather and the clear-sky maximum.
• The app now stays exactly where you were when the system theme or font size changes.

Enjoying Helios? A rating on Google Play helps a lot!