# PV Optimizer & Solar compass vs EG4 Connect

The clearest difference is rating: PV Optimizer & Solar compass at 4.5 against EG4 Connect's 2.8. PV Optimizer & Solar compass also leads on review sentiment (54% vs 35%) and ratings volume (250 vs 24). EG4 Connect's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PV Optimizer & Solar compass sells 1 one-off in-app purchase. EG4 Connect asks for nothing beyond the download.

PV Optimizer & Solar compass holds the better App Store score, 4.5 against 2.8. That said, the two scores are not equally well evidenced: PV Optimizer & Solar compass has 250 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 54% of PV Optimizer & Solar compass's written reviews are positive against 35% of EG4 Connect's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PV Optimizer & Solar compass | EG4 Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (250 ratings)](https://appshunter.io/ios/app/pv-optimizer-and-solar-compass/id971828374/reviews)** | [2.8 (24 ratings)](https://appshunter.io/ios/app/eg4-connect/id6752791573/reviews) |
| Number of ratings | **250** | 24 |
| Positive reviews | **53.6% of reviews** | 35.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 38 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joao Caetano](https://appshunter.io/developer/828553753) | [EG4 Electronics](https://appshunter.io/developer/1840964233) |

## What reviewers say

### PV Optimizer & Solar compass

[App page](https://appshunter.io/ios/app/pv-optimizer-and-solar-compass/id971828374)

Maximize your solar panel output with this tool. It guides you to adjust your panels' azimuth and tilt based on real-time solar data. The app also provides a solar compass and forecasts your potential monthly energy generation.

**Highlights:** Solar panel output maximization, Azimuth and tilt adjustment guidance, Real-time solar compass, Solar panel output forecast, Adjustable time frames for optimization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $0.99 | one-time |

**What reviewers like**

- 👍 Works well once figured out
- 👍 Simple, reliable, practical
- 👍 Useful for PV panel inclination
- 👍 Great for RV and overland solar
- 👍 Awesome for maximizing solar power

**What reviewers complain about**

- 🐛 No instructions provided
- 🐛 Ads are annoying
- 🐛 Pop-up ads prevent use
- 🐛 Gyroscope not working
- 🐛 PV alignment not working

**Reported bugs**

- Guide feature doesn't show on opening page
- Pop-up ads do not close
- Error: iPhone gyroscope off
- Error: Downloading relevant data
- Graph scale breaks down for yearly output

**Requested features**

- More guidance and clarity
- Option for shorter time periods (day/week)
- Adjustment for time settings (night alignment)
- Loss calculation for incorrect orientation
- Option to reverse phone orientation


### EG4 Connect

[App page](https://appshunter.io/ios/app/eg4-connect/id6752791573)

Monitor the status, running data, and events of your solar and energy storage systems. This application provides real-time insights into your energy infrastructure.

**Highlights:** Monitor system status, View running data, Track events, Energy storage system insights, Solar system monitoring

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PV Optimizer & Solar compass free?

PV Optimizer & Solar compass is free to download, with in-app purchases available.

### Is EG4 Connect free?

EG4 Connect is free to download, with no in-app purchases.

### Which has better reviews, PV Optimizer & Solar compass or EG4 Connect?

PV Optimizer & Solar compass is rated higher. PV Optimizer & Solar compass averages 4.5 out of 5 from 250 ratings, while EG4 Connect averages 2.8 from 24 ratings.

### Do PV Optimizer & Solar compass or EG4 Connect have ads?

Neither PV Optimizer & Solar compass nor EG4 Connect shows ads.

### Which is updated more often, PV Optimizer & Solar compass or EG4 Connect?

PV Optimizer & Solar compass ships an update every 2 months, and EG4 Connect every 2 months. Most recently, PV Optimizer & Solar compass was updated on November 1, 2026 and EG4 Connect on November 5, 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.*