# Quappen vs Solar Panel Angle Calculator

The clearest difference is price: Quappen at Free against Solar Panel Angle Calculator's $1.99. Quappen also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.0). Solar Panel Angle Calculator's advantage is update cadence (every 6 weeks vs every 7 months). On ads and in-app purchases there is nothing between them.

Quappen is free to download; Solar Panel Angle Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Quappen ships an update every 7 months, Solar Panel Angle Calculator every 6 weeks. The most recent releases landed on September 17, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Quappen | Solar Panel Angle Calculator |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Size | 0 MB | 10 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Landesfischereiverband Westfalen und Lippe](https://appshunter.io/developer/1491468884) | [Netflowers Inc.](https://appshunter.io/developer/1672067319) |

## What reviewers say

### Quappen

[App page](https://appshunter.io/ios/app/quappen-app/id1491468885)

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar Panel Angle Calculator

[App page](https://appshunter.io/ios/app/solar-panel-angle-calculator/id6794157717)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quappen free?

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

### Is Solar Panel Angle Calculator free?

Solar Panel Angle Calculator costs $1.99, with no in-app purchases.

### Do Quappen or Solar Panel Angle Calculator have ads?

Neither Quappen nor Solar Panel Angle Calculator shows ads.

### Which is updated more often, Quappen or Solar Panel Angle Calculator?

Quappen ships an update every 7 months, and Solar Panel Angle Calculator every 6 weeks. Most recently, Quappen was updated on September 17, 2026 and Solar Panel Angle Calculator on September 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*