# Solar Panel Calculator Plus vs Construction Calculator A1 Pro

The clearest difference is review sentiment: Construction Calculator A1 Pro at 77% against Solar Panel Calculator Plus's 25%. Construction Calculator A1 Pro also leads on rating (4.1 vs 3.3) and update cadence (monthly vs every 47 months). Solar Panel Calculator Plus's advantage is price ($2.99 vs $39.99) and iOS requirement (12.0 vs 15.0). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Solar Panel Calculator Plus costs $2.99 and Construction Calculator A1 Pro $39.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Construction Calculator A1 Pro holds the better App Store score, 4.1 against 3.3. Both are backed by a comparable volume of ratings — 23 and 8 respectively. Written reviews point the same way: 25% of Solar Panel Calculator Plus's written reviews are positive against 77% of Construction Calculator A1 Pro's.

Solar Panel Calculator Plus ships an update every 47 months, Construction Calculator A1 Pro monthly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Solar Panel Calculator Plus | Construction Calculator A1 Pro |
| --- | --- | --- |
| Price | **$2.99** | $39.99 |
| Rating | [3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews) | **[4.1 (8 ratings)](https://appshunter.io/ios/app/construction-calculator-a1-pro/id1587368490/reviews)** |
| Number of ratings | **23** | 8 |
| Positive reviews | 25.0% of reviews | **76.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 8 MB | 126 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688) |

## 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 Calculator A1 Pro

[App page](https://appshunter.io/ios/app/construction-calculator-a1-pro/id1587368490)

This app provides specialized calculators for construction professionals, including concrete, rebar, and area/volume calculations. It helps estimate material quantities, steel tonnage, and perform complex measurements with ease. Users can also generate Bills of Quantities and export reports for clients.

**Highlights:** Concrete quantity estimation, Rebar bending schedule (BBS), Feet-inches calculator, Area and volume calculations, Bill of Quantities (BOQ) export, Project organization and sharing

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**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 Construction Calculator A1 Pro free?

Construction Calculator A1 Pro costs $39.99, with no in-app purchases.

### Which has better reviews, Solar Panel Calculator Plus or Construction Calculator A1 Pro?

Construction Calculator A1 Pro is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while Construction Calculator A1 Pro averages 4.1 from 8 ratings.

### Do Solar Panel Calculator Plus or Construction Calculator A1 Pro have ads?

Neither Solar Panel Calculator Plus nor Construction Calculator A1 Pro shows ads.

### Which is updated more often, Solar Panel Calculator Plus or Construction Calculator A1 Pro?

Solar Panel Calculator Plus ships an update every 47 months, and Construction Calculator A1 Pro monthly. Most recently, Solar Panel Calculator Plus was updated on October 29, 2026 and Construction Calculator A1 Pro on October 30, 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.*