Comparison

ownCloud Online vs Erebus Solar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ownCloud Online

Securely store and share your data with a private cloud solution. Enhance team collaboration and boost productivity with state-of-the-art data handling and end-to-end encryption, all hosted in Germany for maximum privacy.

Highlights
  • Secure cloud storage
  • Team collaboration
  • End-to-end encryption
  • Data privacy
  • Productivity enhancement
  • Open-source codebase
Features
Read full description

Secure cloud storage for your data. Convenient collaboration for your team. Security First ownCloud Online is hosted in Germany, ensuring the highest security standards and the complete privacy of your data. Your cloud is entirely private and dedicated and thanks to ownCloud's open-source codebase, we can guarantee the highest level of software security. What's more end-to-end encryption and related features keep you in control. Focus on Productivity ownCloud Online is designed to boost your productivity. Use your time efficiently and let ownCloud Online handle any time-consuming information organization. Secure and state-of-the-art data handling — yet without expensive IT personnel or having to provision and maintain your own hardware — makes ownCloud Online the most effective cloud solution. Note: This app is intended for use with an active ownCloud Online subscription only. For connecting a self-hosted ownCloud please use our community app.

About

Erebus Solar

This app helps solar professionals measure on-site shade using their phone's sensors. It generates horizon files compatible with leading PV design software, aiding in accurate solar production estimates.

Highlights
  • AR sun path visualization
  • Automatic sky capture
  • Sky Editor for obstruction tracing
  • Annual solar access analysis
  • PDF shade report export
  • Horizon file generation for design tools
  • Project organization by site
Features
Read full description

Measure shade on site with the hardware already in your pocket. Erebus Solar was designed by an electrical engineer and an architect with years of experience designing solar systems around the world. We were fed up with the horizon-finding hardware the industry still relies on: dedicated devices that haven't been meaningfully updated in decades, are slow to use and slow to find a GPS fix, and analog tools that need paper, a pencil and a latitude template that may not exist for your site. Erebus Solar is our answer. Your iPhone already has the camera, compass and sensors the job needs. WHY HORIZON FILES MATTER Far-field shading from trees, terrain and neighbouring buildings is one of the largest sources of error in a PV production estimate. A measured horizon profile, captured on site, lets your design software model that shading instead of guessing. Erebus Solar produces horizon files that leading PV design tools such as HelioScope and PVsyst read directly, and PV*SOL accepts the same convention. CAPTURE • AR sun path: today's arc, the solstice and equinox arcs and the live sun drawn over the real sky • Tap the real sun to calibrate the compass to true north • Automatic sky capture: sweep the envelope band and frames capture themselves, no buttons • Sky Editor: review the stitched sky and trace obstructions by hand, so the report reflects what you saw ANALYSE • Annual solar access and TSRF for each array area • Month-by-month charts and the sun-path chart with your obstructions • Aerial view with each area's boundary and the solar envelope over satellite imagery EXPORT • PDF shade report with your company name and logo • Horizon files for HelioScope, PVsyst and PV*SOL, generated from the same capture • Share straight from the phone ORGANISE • One project per site, located by address or GPS, with status from Created to Completed • Areas for each roof face or ground section • Everything stored on your iPhone: no account, no upload Erebus Solar's outputs are a design aid for qualified professionals. Results depend on the phone's sensors, compass calibration and sky conditions; check them against your own observations and your design tool's simulation before relying on them. Privacy Policy: https://erebussolar.app/privacy Terms of Use: https://erebussolar.app/terms

Screenshots

ownCloud Online4 screens
Erebus Solar4 screens

Verdict

The call

The clearest difference is rating: ownCloud Online at 5.0 against Erebus Solar's 3.7. ownCloud Online also leads on device support (3 vs 1) and iOS requirement (15.4 vs 17.0). Erebus Solar's advantage is update cadence (every 2 weeks vs every 2 months). On price, review sentiment, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ownCloud Online holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

ownCloud Online ships an update every 2 months, Erebus Solar every 2 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
ownCloud Online versus Erebus Solar: the parameters behind the verdict, then further details
ParameterownCloud OnlineErebus Solar
PriceFreeFree
Rating5.0 (5 ratings) — better3.7 (3 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings5 — better3
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.4 — better17.0
Further details — not scored
Size69 MB19 MB
Age rating4+4+
DeveloperownCloud GmbHTodd Evans

Customer experience

ownCloud Online

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Erebus Solar

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

ownCloud Online

No in-app purchases

None

Erebus Solar

No in-app purchases

Questions

Is ownCloud Online free?
ownCloud Online is free to download, with no in-app purchases.
Is Erebus Solar free?
Erebus Solar is free to download, with no in-app purchases.
Which has better reviews, ownCloud Online or Erebus Solar?
ownCloud Online is rated higher. ownCloud Online averages 5.0 out of 5 from 5 ratings, while Erebus Solar averages 3.7 from 3 ratings.
Do ownCloud Online or Erebus Solar have ads?
Neither ownCloud Online nor Erebus Solar shows ads.
Which is updated more often, ownCloud Online or Erebus Solar?
ownCloud Online ships an update every 2 months, and Erebus Solar every 2 weeks. Most recently, ownCloud Online was updated on November 2, 2026 and Erebus Solar on October 31, 2026.

Other comparisons