# BlitzRechner vs Sun Hours for Solar Panels

The clearest difference is review sentiment: Sun Hours for Solar Panels at 86% against BlitzRechner's 0%. Sun Hours for Solar Panels also leads on update cadence (every 6 days vs every 6 weeks) and device support (4 vs 2). BlitzRechner's advantage is ads (none vs shown). On price, in-app purchases and monetization model there is nothing between them.

Both are free to download. BlitzRechner sells 3 one-off in-app purchases and Sun Hours for Solar Panels sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

BlitzRechner ships an update every 6 weeks, Sun Hours for Solar Panels every 6 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | BlitzRechner | Sun Hours for Solar Panels |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (3 ratings)](https://appshunter.io/ios/app/sun-hours-for-solar-panels/id6773940001/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | **85.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 2 MB | 55 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Christopher Fuchs](https://appshunter.io/developer/1654565548) | [Andy Mesa](https://appshunter.io/developer/1851743474) |

## What reviewers say

### BlitzRechner

[App page](https://appshunter.io/ios/app/blitzrechner/id6446580439)

Visually track approaching thunderstorms by timing lightning and thunder. Measure storm distance using your iPhone or Apple Watch. Review past measurements and compare data with saved entries and notes.

**Highlights:** Visual storm distance tracking, Lightning and thunder timing, iPhone and Apple Watch support, Review saved measurements, Compare storm data, Add notes to measurements

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Brötchen | $1.99 | one-time |
| Pommes | $3.99 | one-time |
| Döner | $6.99 | one-time |


### Sun Hours for Solar Panels

[App page](https://appshunter.io/ios/app/sun-hours-for-solar-panels/id6773940001)

Get a quick solar generation forecast for your UK home or portable panels. See hourly and daily predictions, optimize appliance usage with smart timers, and receive alerts for peak solar windows. Works with any UK solar setup without inverter login.

**Highlights:** 8-second solar generation forecast, Hourly and 7-day generation curves, 30-day historical weather view, Personalized daily forecast alerts, Smart appliance scheduling, Portable panel forecasting (Travel Mode), Works with all UK solar setups

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sun Hours Pro Monthly | $0.99 | per month |
| No Ads - Lifetime | $0.99 | one-time |
| Sun Hours Pro - Lifetime | $5.99 | one-time |


## Frequently asked questions

### Is BlitzRechner free?

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

### Is Sun Hours for Solar Panels free?

Sun Hours for Solar Panels is free to download, with in-app purchases available.

### Do BlitzRechner or Sun Hours for Solar Panels have ads?

Sun Hours for Solar Panels shows ads; BlitzRechner does not.

### Which is updated more often, BlitzRechner or Sun Hours for Solar Panels?

BlitzRechner ships an update every 6 weeks, and Sun Hours for Solar Panels every 6 days. Most recently, BlitzRechner was updated on November 3, 2026 and Sun Hours for Solar Panels on November 5, 2026.

---

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