# PV Calculator. vs Invoice Generator

The clearest difference is update cadence: Invoice Generator at every 11 days against PV Calculator.'s every 7 months. PV Calculator.'s advantage is iOS requirement (13.0 vs 18.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. PV Calculator. sells 1 one-off in-app purchase and Invoice Generator sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

PV Calculator. ships an update every 7 months, Invoice Generator every 11 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PV Calculator. | Invoice Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator/id6758427564/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 11 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 52 MB | 49 MB |
| Requires iOS | **13.0** | 18.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [Hexalitics Technology Pvt. Ltd.](https://appshunter.io/developer/1611898082) |

## 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 |


### Invoice Generator

[App page](https://appshunter.io/ios/app/invoice-generator-pdf-maker/id6777915786)

Easily create and send professional invoices with customizable templates and branding. This app simplifies billing for freelancers and small businesses, allowing for quick PDF generation and sharing via email or messaging. Core features work offline, ensuring accessibility for on-the-go professionals.

**Highlights:** Create professional invoices, Customizable templates, Add business logo and colors, Calculate taxes and discounts, Offline invoice creation, PDF export and sharing

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $9.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is PV Calculator. free?

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

### Is Invoice Generator free?

Invoice Generator is free to download, with in-app purchases available.

### Do PV Calculator. or Invoice Generator have ads?

Neither PV Calculator. nor Invoice Generator shows ads.

### Which is updated more often, PV Calculator. or Invoice Generator?

PV Calculator. ships an update every 7 months, and Invoice Generator every 11 days. Most recently, PV Calculator. was updated on November 5, 2026 and Invoice Generator on October 31, 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.*