Comparison

Solar APP 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

Solar APP

This tool provides comprehensive solar energy analysis, including system design, battery storage optimization, and real-time utility price tracking. Generate detailed PDF reports for your solar projects to make informed decisions and maximize savings.

Highlights
  • PDF Report Generation
  • Battery Storage System Optimization
  • Ultimate Solar Analysis
  • Optimal Power Calculation
  • Utility Consumption and Price Analysis
Features
Read full description

Solar APP: Your Comprehensive Solar Analysis Solution! Solar APP is a powerful and user-friendly tool designed to revolutionize your solar journey. With its advanced features and intuitive interface, you can confidently navigate the complexities of solar energy and make informed decisions for your specific needs. Solar App is designed to assist you in every step of the way, from concept to implementation. The app offers in-depth solar analysis to tailor the best technical and financial solutions for your needs. One of our standout features is the battery storage system function. It optimizes your energy consumption, allowing you to store excess solar power for later use, ensuring you never waste a ray of sunshine. But, Solar App is more than just a planning tool. It provides real-time tracking of utility prices, enabling you to make informed decisions about when to buy or sell electricity. This unique feature helps you maximize your savings and take control of your energy costs. Each project you embark on with Solar App comes with a detailed PDF report, allowing you to keep track of your progress and future plans. Harness the power of the sun with Solar App - your partner in green energy solutions. Key Features: 1. PDF Report Generation: Generate professional and comprehensive reports with detailed financial and technical information about your solar project. Share these reports with ease to facilitate collaboration and decision-making. 2. Battery Storage System: Store the excess solar power for later use and make more profit. Check the feasibility of the Battery Storage Option for your Projects (BESS) 2. Ultimate Solar Analysis: Leverage the ultimate tool for solar analysis, providing you with precise insights and recommendations. Discover the best options for your solar installation by considering factors such as sun exposure, energy consumption patterns, and utility prices. 3. Optimal Power Calculation: Access our extensive solar irradiation database to determine the optimal installed power for your location. Maximize your energy generation potential and achieve the highest return on investment. 4. Utility Consumption and Price Analysis: Analyze your utility consumption patterns and prices to optimize your solar installation. Identify potential savings, and make informed decisions to reduce your electricity costs. Plan and Design any Photovoltaic System and obtain analysis before engaging an Installer. Print and Share PDF Reports for any variant, different PV Configuration, different location. Compare your PV solar installation with the Solar App Reports. Solar App empowers you to take control of your solar journey. Download now and embark on a sustainable path towards energy independence. Make the most of solar energy with Solar App! Our dedicated support team is here to assist you with any questions, concerns, or technical issues you may encounter along your solar journey. Feel free to reach out to us at support@pvsolcast.com, and we'll be delighted to assist you promptly. Before using Solar App, please make sure to review and agree to our Terms and Conditions. These terms outline the rights, responsibilities, and limitations associated with the use of our app. By accessing and using Solar App, you acknowledge and accept our Terms and Conditions, which can be found on the following website: https://sites.google.com/view/pvfterms/home. We are committed to providing you with the best solar analysis experience possible, and we value your feedback. If you have any suggestions or feature requests, please don't hesitate to contact us. We are continuously working to improve Solar App and ensure it meets your evolving solar energy needs. Join the Solar App community today and unlock the full potential of solar energy. Start your solar journey and make a positive impact on the environment and your finances. Together, let's harness the power of the sun with Solar App! PV Solcast Team www.pvsolcast.com

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

Solar APP4 screens
Erebus Solar4 screens

Verdict

The call

The clearest difference is rating: Solar APP at 4.5 against Erebus Solar's 3.7. Solar APP also leads on ratings volume (46 vs 3). Erebus Solar's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, review sentiment, device support and iOS requirement 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. Solar APP sells 2 in-app purchases, starting at $9.99 per month. Erebus Solar asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Solar APP holds the better App Store score, 4.5 against 3.7. That said, the two scores are not equally well evidenced: Solar APP has 46 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Solar APP ships an update every 4 months, Erebus Solar every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
Solar APP versus Erebus Solar: the parameters behind the verdict, then further details
ParameterSolar APPErebus Solar
PriceFreeFree
Rating4.5 (46 ratings) — better3.7 (3 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings46 — better3
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size17 MB19 MB
Age rating4+4+
DeveloperIgor IlijovskiTodd Evans

Customer experience

Solar APP

All ratings23 ratings
Positive87.0%
Neutral4.3%
Negative8.7%
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

2 purchases

Solar APP

Subscriptions2
  • Solar APP Premium 1 Month$9.991 Month
  • Solar APP Premium 12 Months$39.991 Year
None

Erebus Solar

No in-app purchases

Questions

Is Solar APP free?
Solar APP is free to download, with in-app purchases available.
Is Erebus Solar free?
Erebus Solar is free to download, with no in-app purchases.
Which has better reviews, Solar APP or Erebus Solar?
Solar APP is rated higher. Solar APP averages 4.5 out of 5 from 46 ratings, while Erebus Solar averages 3.7 from 3 ratings.
Do Solar APP or Erebus Solar have ads?
Solar APP shows ads; Erebus Solar does not.
Which is updated more often, Solar APP or Erebus Solar?
Solar APP ships an update every 4 months, and Erebus Solar every 2 weeks. Most recently, Solar APP was updated on November 3, 2026 and Erebus Solar on October 31, 2026.

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