# PV Calculator. vs Cloud OS

The clearest difference is in-app purchases: Cloud OS at none against PV Calculator.'s 1. Cloud OS also leads on update cadence (every 2 months vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PV Calculator. sells 1 one-off in-app purchase. Cloud OS asks for nothing beyond the download.

PV Calculator. ships an update every 7 months, Cloud OS every 2 months. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PV Calculator. | Cloud OS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator/id6758427564/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 102 MB |
| Requires iOS | **13.0** | 14 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [桢田科技(深圳)有限公司](https://appshunter.io/developer/1752981915) |

## What reviewers say

### PV Calculator.

[App page](https://appshunter.io/ios/app/pv-calculator/id6758427564)

This tool simplifies solar photovoltaic system design and analysis for professionals and students. It offers a comprehensive Energy Hub with multiple calculators, providing instant results, visual charts, and clear insights for efficient PV system planning and optimization.

**Highlights:** Energy Hub with multiple solar calculators, Calculate solar panel power output, Analyze energy generation (daily, monthly, yearly), Design solar array size, Calculate system voltage and configuration, Instant calculation results, Visual charts and performance summaries

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


### Cloud OS

[App page](https://appshunter.io/ios/app/cloud-os/id6760682218)

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

**In-app purchases:** none


## Frequently asked questions

### Is PV Calculator. free?

PV Calculator. is free to download, with in-app purchases available.

### Is Cloud OS free?

Cloud OS is free to download, with no in-app purchases.

### Do PV Calculator. or Cloud OS have ads?

Neither PV Calculator. nor Cloud OS shows ads.

### Which is updated more often, PV Calculator. or Cloud OS?

PV Calculator. ships an update every 7 months, and Cloud OS every 2 months. Most recently, PV Calculator. was updated on October 17, 2026 and Cloud OS on October 10, 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.*