SAFE FIRE vs HoriSol
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SAFE FIRE
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Die Kunden der SAFE FIRE GmbH können diese App nutzen, um die gespeicherten Kundendaten zu betrachten und die Prüfprotokolle zu exportieren. Die Mitarbeiter der SAFE FIRE GmbH können darüber hinaus, Prüfprotokolle erstellen und kundenspezifische Daten erstellen sowie verändern.
HoriSol
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No hype. Real numbers. HoriSol calculates whether a balcony solar kit actually makes sense at your specific location — using real photo-based shading measurements and conservative assumptions you can actually understand. 6 STEPS TO YOUR YIELD ESTIMATE 1. Location — GPS or address search 2. Panel — power, orientation, tilt, multiple arrays (East/West) 3. Shading — three photos per orientation, real horizon analysis 4. Consumption — household profile with heat pump, EV, hot water 5. Economics — investment cost, electricity price, feed-in tariff 6. Result — annual yield (kWh), payback period, self-consumption rate, CO₂ savings WHY OTHER APPS ARE TOO OPTIMISTIC Vendor calculators use idealized data. HoriSol measures your actual shading from photos, corrects known bias in hourly aggregations, and pulls solar data from the best available source for your location: • PVGIS for Europe and Africa • PVWatts for the USA • NASA POWER as global fallback Results carry a ±10% confidence range — no black box, no magic numbers. NO COMPROMISES • Fully offline — no cloud required, no tracking • No account, no sign-up, no email • All model assumptions openly documented • Country-specific defaults: electricity prices, load profiles, feed-in rates PREMIUM — ONE-TIME, NO SUBSCRIPTION A single purchase unlocks: • 3-page professional PDF report (vs. 1 page free) • Up to 20 saved configurations (vs. 1 free) • Multiple arrays with separate shading analysis • Detailed load profile upload (custom consumption data) WHO IS HORISOL FOR? HoriSol is for renters and homeowners who want an honest answer — not for people already convinced who just want confirmation. If the numbers don't add up, the app will tell you that too.
Screenshots
Verdict
The clearest difference is in-app purchases: SAFE FIRE at none against HoriSol's 1. On price, ads, device support and iOS requirement 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. HoriSol sells 1 one-off in-app purchase. SAFE FIRE asks for nothing beyond the download.
| Parameter | SAFE FIRE | HoriSol |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 16.0 |
| Further details — not scored | ||
| Size | 39 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | InProSens UG (haftungsbeschrankt) | Malte Schlüter |
In-app purchases
SAFE FIRE
No in-app purchases
HoriSol
- HoriSol Premium (Lifetime)$5.99









