# My Solar Panel vs Erebus Solar

The clearest difference is review sentiment: My Solar Panel at 43% against Erebus Solar's 0%. My Solar Panel also leads on rating (4.6 vs 3.7) and ratings volume (110 vs 3). Erebus Solar's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price there is nothing between them.

Both are free to download. My Solar Panel sells 2 in-app purchases, starting at $9.99 per month. Erebus Solar asks for nothing beyond the download.

My Solar Panel holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: My Solar Panel has 110 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 43% of My Solar Panel's written reviews are positive against 0% of Erebus Solar's.

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

## The numbers

| Metric | My Solar Panel | Erebus Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (110 ratings)](https://appshunter.io/ios/app/my-solar-panel/id1498356619/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/erebus-solar/id6790828521/reviews) |
| Number of ratings | **110** | 3 |
| Positive reviews | **42.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 19 MB |
| Requires iOS | **13.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Igor Ilijovski](https://appshunter.io/developer/1492982127) | [Todd Evans](https://appshunter.io/developer/6790828523) |

## What reviewers say

### My Solar Panel

[App page](https://appshunter.io/ios/app/my-solar-panel/id1498356619)

Design and analyze solar photovoltaic systems on your smartphone. Get electricity generation estimates, payback periods, and detailed financial analyses for rooftop or commercial installations. Optimize your system for maximum output and make informed investment decisions.

**Highlights:** Design solar projects on mobile, Estimate electricity generation, Calculate payback period, Generate PDF reports, 3D panel simulator, Shading analysis, Financial analysis tools

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all features | $9.99 | per month |
| Unlock all features | $39.99 | per year |


### Erebus Solar

[App page](https://appshunter.io/ios/app/erebus-solar/id6790828521)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is My Solar Panel free?

My Solar Panel 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, My Solar Panel or Erebus Solar?

My Solar Panel is rated higher. My Solar Panel averages 4.6 out of 5 from 110 ratings, while Erebus Solar averages 3.7 from 3 ratings.

### Do My Solar Panel or Erebus Solar have ads?

My Solar Panel shows ads; Erebus Solar does not.

### Which is updated more often, My Solar Panel or Erebus Solar?

My Solar Panel ships an update every 2 months, and Erebus Solar every 2 weeks. Most recently, My Solar Panel was updated on November 3, 2026 and Erebus Solar on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*