BlitzRechner vs Sun Hours for Solar Panels
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BlitzRechner
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.
- Visual storm distance tracking
- Lightning and thunder timing
- iPhone and Apple Watch support
- Review saved measurements
- Compare storm data
- Add notes to measurements
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Eine App, die Visuell darstellt wie weit das nächste Gewitter entfernt ist. Durch das tippen beim sehen eines Blitzes und beim erneuten Tippen wenn Sie ein Donner hören kann die App die Entfernung zum Gewitter messen. Sobald ein Gewitter auftritt kannst du diese App nutzen um mit Hilfe deines iPhones oder Apple Watch herauszufinden wie weit dieses entfernt ist. Willst du jede Messung nochmal überprüfen oder die Werte mit Anderen vergleichen? Auch das stellt kein Problem da! Schau einfach mal zu deinen Gespeicherten Elementen rein und mache dir auch Notizen Viel Spaß
Sun Hours for Solar Panels
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.
- 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
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Will your panels generate anything today? Sun Hours tells you in 8 seconds — just your ZIP/postal code or map pin and your best-ever solar day. No inverter login. No azimuth. No account. No engineering degree. THE FORECAST Today's expected kWh before your coffee is ready. An hour-by-hour generation curve shows exactly when your panels peak. Get a 7-day solar forecast with cloud cover and efficiency for each day, plus a 30-day view built from historical weather at your exact location — so you understand your site's full seasonal rhythm, not just this week. SOL Every morning, Sol — Sun Hours' pixel-art sun mascot — delivers a personal forecast for your panels before you've touched a chart. When today's forecast matches your all-time best generation day, Sol sends a notification: "It's a 100% day." The solar equivalent of a perfect score. SUN HOURS ALERTS Optional morning notifications tell you the day's best two-hour solar window. "Best window today: 11 AM–1 PM." Charge the EV, run the dishwasher, or power another appliance with your own free electricity instead of the grid. SMART APPLIANCE TIMER Tell Sun Hours which appliances you use. It tells you exactly when to run each one during your solar peak. Washer, dishwasher, dryer, EV top-up — scheduled around your free generation, not your habits. TRAVEL MODE Portable panels on an RV? Camping with a folding kit? Drop a pin anywhere or use GPS to get a solar forecast for that exact location. One tap takes you back to your home setup. WORKS WITH EVERYTHING Hoymiles, Deye, Marstek, Envertech, APS, Solis, Growatt — and every other rooftop or plug-in setup. No inverter integration needed. If it generates kWh, Sun Hours can forecast it. ON IPAD AND MAC The dashboard opens out into two columns on iPad, so today and the week ahead sit side by side rather than stacked, with the animated sky running edge to edge behind a frosted glass toolbar. The forecast accuracy grid uses the extra width and labels each month. It runs on an M-series Mac too. Free to use. Infrequent, closable ads. No account. No tracking. Your location never leaves your device. Built in the UK for solar owners everywhere — by someone who got tired of apps making a simple question complicated. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sunhours.app/privacy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | BlitzRechner | Sun Hours for Solar Panels |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | 85.7% of reviews — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks | Every 6 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Fuchs | Andy Mesa |
Customer experience
BlitzRechner
Sun Hours for Solar Panels
In-app purchases
BlitzRechner
- Brötchen$1.99
- Pommes$3.99
- Döner$6.99
Sun Hours for Solar Panels
- Sun Hours Pro Monthly7 Days trial$0.991 Month
- No Ads - Lifetime$0.99
- Sun Hours Pro - Lifetime$5.99
Questions
Is BlitzRechner free?
Is Sun Hours for Solar Panels free?
Do BlitzRechner or Sun Hours for Solar Panels have ads?
Which is updated more often, BlitzRechner or Sun Hours for Solar Panels?
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