# Solar Panel Calculator Plus vs Construction Calc Pro 7

The clearest difference is price: Construction Calc Pro 7 at Free against Solar Panel Calculator Plus's $2.99. Construction Calc Pro 7 also leads on rating (4.3 vs 3.3) and update cadence (every 2 months vs every 47 months). Solar Panel Calculator Plus's advantage is in-app purchases (none vs 1) and ads (none vs shown). On review sentiment, ratings volume and device support there is nothing between them.

Construction Calc Pro 7 is free to download; Solar Panel Calculator Plus costs $2.99 up front. Construction Calc Pro 7 sells 1 one-off in-app purchase. Solar Panel Calculator Plus asks for nothing beyond the download.

Construction Calc Pro 7 holds the better App Store score, 4.3 against 3.3. Both are backed by a comparable volume of ratings — 23 and 28 respectively. Written reviews split almost evenly too, at 25% and 25% positive.

Solar Panel Calculator Plus ships an update every 47 months, Construction Calc Pro 7 every 2 months. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Solar Panel Calculator Plus | Construction Calc Pro 7 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews) | **[4.3 (28 ratings)](https://appshunter.io/ios/app/construction-calc-pro-7/id1419339827/reviews)** |
| Number of ratings | 23 | **28** |
| Positive reviews | 25.0% of reviews | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 47 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 8 MB | 88 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) | [Troy Knight](https://appshunter.io/developer/1419339802) |

## 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


### Construction Calc Pro 7

[App page](https://appshunter.io/ios/app/construction-calc-pro-7/id1419339827)

This app offers a comprehensive suite of 82 construction calculators for various tasks like concrete, drywall, and roofing. It allows measurements in both imperial and metric units and features a high-visibility display for use in direct sunlight.

**Highlights:** 82 construction calculators, Imperial and metric measurements, High visibility display, Aggregate, asphalt, concrete calculations, Drywall, flooring, framing tools, Paint, rafter, roofing calculators

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium ad-free version | $3.99 | one-time |


## Frequently asked questions

### Is Solar Panel Calculator Plus free?

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

### Is Construction Calc Pro 7 free?

Construction Calc Pro 7 is free to download, with in-app purchases available.

### Which has better reviews, Solar Panel Calculator Plus or Construction Calc Pro 7?

Construction Calc Pro 7 is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while Construction Calc Pro 7 averages 4.3 from 28 ratings.

### Do Solar Panel Calculator Plus or Construction Calc Pro 7 have ads?

Construction Calc Pro 7 shows ads; Solar Panel Calculator Plus does not.

### Which is updated more often, Solar Panel Calculator Plus or Construction Calc Pro 7?

Solar Panel Calculator Plus ships an update every 47 months, and Construction Calc Pro 7 every 2 months. Most recently, Solar Panel Calculator Plus was updated on October 27, 2026 and Construction Calc Pro 7 on October 8, 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.*