# PV Solar Tilt vs Erebus Solar

The clearest difference is rating: PV Solar Tilt at 4.4 against Erebus Solar's 3.7. PV Solar Tilt also leads on review sentiment (33% vs 0%) and ratings volume (169 vs 3). Erebus Solar's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price there is nothing between them.

Both are free to download. PV Solar Tilt sells 1 one-off in-app purchase. Erebus Solar asks for nothing beyond the download.

PV Solar Tilt holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: PV Solar Tilt has 169 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of PV Solar Tilt's written reviews are positive against 0% of Erebus Solar's.

PV Solar Tilt 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.

## The numbers

| Metric | PV Solar Tilt | Erebus Solar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (169 ratings)](https://appshunter.io/ios/app/pv-solar-tilt/id1492982128/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/erebus-solar/id6790828521/reviews) |
| Number of ratings | **169** | 3 |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 19 MB |
| Requires iOS | **13.0** | 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

### PV Solar Tilt

[App page](https://appshunter.io/ios/app/pv-solar-tilt/id1492982128)

Determine the ideal tilt angle for your photovoltaic system to maximize electricity generation. This app provides solar data, optimization tools, and an on-site inclinometer to ensure your panels are optimally positioned for your location.

**Highlights:** Solar data charts, Tilt vs azimuth optimization, Optimal tilt angle for any location, Optimal orientation, Monthly, daily, and hourly tilt optimization, On-site inclinometer

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime license | $14.99 | one-time |


### 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 PV Solar Tilt free?

PV Solar Tilt 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, PV Solar Tilt or Erebus Solar?

PV Solar Tilt is rated higher. PV Solar Tilt averages 4.4 out of 5 from 169 ratings, while Erebus Solar averages 3.7 from 3 ratings.

### Do PV Solar Tilt or Erebus Solar have ads?

PV Solar Tilt shows ads; Erebus Solar does not.

### Which is updated more often, PV Solar Tilt or Erebus Solar?

PV Solar Tilt ships an update every 4 months, and Erebus Solar every 2 weeks. Most recently, PV Solar Tilt was updated on November 3, 2026 and Erebus Solar on October 31, 2026.

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