# Solar Panel Calculator Plus vs Z Platform

The clearest difference is price: Z Platform at Free against Solar Panel Calculator Plus's $2.99. Z Platform also leads on rating (5.0 vs 3.3) and update cadence (every 5 days vs every 47 months). Solar Panel Calculator Plus's advantage is ratings volume (23 vs 7) and iOS requirement (12.0 vs 18.5). On ads, in-app purchases and device support there is nothing between them.

Z Platform 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.

Z Platform holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 23 and 7 respectively.

Solar Panel Calculator Plus ships an update every 47 months, Z Platform every 5 days. The most recent releases landed on November 2, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Solar Panel Calculator Plus | Z Platform |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/z-platform/id6751442873/reviews)** |
| Number of ratings | **23** | 7 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 5 days** |
| Monetization | Paid | **Free** |
| Size | 8 MB | 184 MB |
| Requires iOS | **12.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Egalvanic LLC](https://appshunter.io/developer/1835143918) |

## 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


### Z Platform

[App page](https://appshunter.io/ios/app/z-platform/id6751442873)

This platform assists service providers in managing electrical distribution systems for medium-to-high voltage applications. It streamlines workflows, prioritizes tasks, and supports data collection for electrical maintenance standards like NFPA 70B and 70E.

**Highlights:** Work session management, Electrical maintenance support, Data collection for NFPA 70B/70E, Infrared thermography, Arc Flash Hazard Analysis data, Multi-year maintenance quoting, De-energized testing

**Features:** macOS Compatibility, 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 Z Platform free?

Z Platform is free to download, with no in-app purchases.

### Which has better reviews, Solar Panel Calculator Plus or Z Platform?

Z Platform is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while Z Platform averages 5.0 from 7 ratings.

### Do Solar Panel Calculator Plus or Z Platform have ads?

Neither Solar Panel Calculator Plus nor Z Platform shows ads.

### Which is updated more often, Solar Panel Calculator Plus or Z Platform?

Solar Panel Calculator Plus ships an update every 47 months, and Z Platform every 5 days. Most recently, Solar Panel Calculator Plus was updated on November 2, 2026 and Z Platform on November 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.*