# Solar Panel Calculator Plus vs Phillips REAR

The clearest difference is review sentiment: Phillips REAR at 100% against Solar Panel Calculator Plus's 25%. Phillips REAR also leads on price (Free vs $2.99) and rating (5.0 vs 3.3). Solar Panel Calculator Plus's advantage is ratings volume (23 vs 5) and iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

Phillips REAR is free to download; Solar Panel Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phillips REAR holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 23 and 5 respectively. Written reviews point the same way: 25% of Solar Panel Calculator Plus's written reviews are positive against 100% of Phillips REAR's.

Solar Panel Calculator Plus ships an update every 47 months, Phillips REAR monthly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Solar Panel Calculator Plus | Phillips REAR |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/phillips-rear-vu/id1669085162/reviews)** |
| Number of ratings | **23** | 5 |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 8 MB | 84 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Phillips](https://appshunter.io/developer/1349058006) |

## What reviewers say

### Solar Panel Calculator Plus

[App page](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660)

Calculate custom off-grid solar home power systems. Determine the exact number of solar panels and battery capacity needed for your energy usage. Helps plan system size, inverter requirements, and battery bank specifications.

**Highlights:** Calculate solar panel requirements, Determine battery capacity, Calculate inverter size, Estimate daily energy usage, Plan days of autonomy, Optimize battery life calculations

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

**In-app purchases:** none


### Phillips REAR

[App page](https://appshunter.io/ios/app/phillips-rear-vu/id1669085162)

This app provides superior visibility and a reliable connection for trailer backup, enhancing driver and pedestrian safety. It can be used like a rearview mirror for improved situational awareness while driving.

**Highlights:** Wireless trailer backup camera, Reliable connection, Superior visibility, Improved driver safety, Situational awareness, Asset protection

**In-app purchases:** none


## Frequently asked questions

### Is Solar Panel Calculator Plus free?

Solar Panel Calculator Plus costs $2.99, with no in-app purchases.

### Is Phillips REAR free?

Phillips REAR is free to download, with no in-app purchases.

### Which has better reviews, Solar Panel Calculator Plus or Phillips REAR?

Phillips REAR is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while Phillips REAR averages 5.0 from 5 ratings.

### Do Solar Panel Calculator Plus or Phillips REAR have ads?

Neither Solar Panel Calculator Plus nor Phillips REAR shows ads.

### Which is updated more often, Solar Panel Calculator Plus or Phillips REAR?

Solar Panel Calculator Plus ships an update every 47 months, and Phillips REAR monthly. Most recently, Solar Panel Calculator Plus was updated on October 27, 2026 and Phillips REAR on October 24, 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.*