# Helios Solar Monitor — Panel Production Forecast > Panel Production Forecast (iPhone/iPad app by Mehmet Daln.) - Source: https://appshunter.io/ios/app/helios-solar-monitor/id6789564612 (this page in markdown: same URL + `.md`) - Developer: [Mehmet Daln](https://appshunter.io/developer/6789397853) - Category: Utilities, Productivity - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 18.0 · 10 MB - Languages: British English, Arabic, French (France), German (Germany), Hindi, Italian, Brazilian Portuguese, European Spanish, Turkish - Released: 2026-07-19 - Data updated: 2026-08-10 - User reviews in markdown: https://appshunter.io/ios/app/helios-solar-monitor/id6789564612/reviews.md ## What is Helios Solar Monitor? Helios Solar Monitor is a hardware-free solar planner and forecaster. Add any installation by its location and panel setup, and get accurate, physics-based production estimates — no inverter or smart device required. NOTE: All figures are estimates computed from live weather + your panel configuration (clearly labeled "estimated"). Helios Solar Monitor is a planning and forecasting tool, not a real-time inverter monitor. PLAN & FORECAST • Estimated live power (kW) and today's production (kWh), driven by sun position • Multi-day production forecast • Accurate solar geometry (Equation of Time, longitude & DST corrected) • A dynamic hero that shifts with the sun through the day FLEET, NOT JUST ONE PANEL • Manage multiple installations in one place • Per-installation tilt, azimuth, panel type, inverter limit and horizon shading • Interactive home-screen widget PROFESSIONAL ANALYSIS (Premium) • Financial analysis — ROI, IRR, NPV, LCOE, discounted payback • Agricultural / irrigation calculator (FAO-56 ET₀, crop coefficients, pump sizing) • PDF & CSV reports — daily, weekly, monthly • PVWatts-style loss breakdown (cloud, temperature, soiling, system, clipping, shading) • Environmental risk — dust/soiling, hail and wind • Historical analytics & trends • Weather hazard notifications DATA FROM EVERYWHERE Open-Meteo, NASA POWER, PVGIS and air-quality data combine for location-specific estimates. 11 LANGUAGES · PRIVATE BY DESIGN Your data stays on your device. Your location is used only to compute estimates and is never sold or used for tracking. No account, no ads. Premium subscription: monthly or yearly, with a 7-day free trial. Cancel anytime. Terms: https://app.mehmetdalgin.com/helios/kosullar/ Privacy: https://app.mehmetdalgin.com/helios/gizlilik/ ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Helios Premium Monthly | $6.99 | per month | | Helios Premium Yearly | $59.99 | per year | ## Version history (last 2 releases) ### 1.3 — 2026-08-08 Smart production notifications Helios can now tell you when production starts and ends, how much you produced today, and — before the day begins — whether dust or heavy cloud will cost you output. Everything is calculated on your device from the sun's position, so alerts arrive even if you don't open the app. Your measured production, on the chart Production you enter by hand now appears alongside the forecast, with the deviation shown per bar. An unfinished month is compared against the forecast for the days you actually measured, not the whole month. Units that match where you are Temperature and wind now follow your region (°F and mph in the US), with a manual override in Settings. Currency in the financial tools follows your region too — previously it could fall back to a generic symbol. Numbers in your language Decimal separators, thousands grouping and the percent sign now follow each language's own rules. Accurate sun math on every calendar On devices set to a non-Gregorian calendar (Hijri, Hebrew and others), sunrise, sunset and production estimates were computed for the wrong time of year. Fixed. More ways to share The impact card now has monthly and seasonal variants. ### 1.0 — 2026-07-19 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*