# Kortenberg vs PV Calculator.

The clearest difference is in-app purchases: Kortenberg at none against PV Calculator.'s 1. Kortenberg also leads on update cadence (fortnightly vs every 7 months). PV Calculator.'s advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

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

Kortenberg ships an update fortnightly, PV Calculator. every 7 months. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Kortenberg | PV Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator/id6758427564/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 71 MB | 52 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Vlaamse overheid](https://appshunter.io/developer/664577169) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## What reviewers say

### Kortenberg

[App page](https://appshunter.io/ios/app/kortenberg/id1596490914)

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Kortenberg free?

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

### Is PV Calculator. free?

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

### Do Kortenberg or PV Calculator. have ads?

Neither Kortenberg nor PV Calculator. shows ads.

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

Kortenberg ships an update fortnightly, and PV Calculator. every 7 months. Most recently, Kortenberg was updated on October 24, 2026 and PV Calculator. on October 17, 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.*