Sunplan: Solar Forecast
Sunplan is a solar energy forecasting utility for iOS that calculates production based on physical roof parameters and local weather data.
The App DNA
What makes this app unique?
Sunplan removes the need for account-based solar monitoring by performing all irradiance calculations on-device, appealing to users who prioritize data privacy over cloud-synced hardware integration.
For Homeowners with rooftop solar installations who want to plan energy self-consumption and battery usage.
What does it look like?
Key features
Calculates solar output based on roof geometry, azimuth, tilt, and sun position rather than simple weather data.
Performs all energy calculations on-device without server communication or account requirements.
Allows tracking of multiple solar installations within a single interface.
How much does it cost?
Sunplan is currently distributed as a free utility with no observed monetization, ads, or subscription gates.
Velocity
Maintenance developmentopaqueShow more...
The app is currently in a maintenance state, having shipped only a single version 29 days ago. With no further releases or feature iterations observed, the development momentum is currently stagnant. The initial release serves as the only data point, and the lack of subsequent activity suggests a focus on stability or a pause in development. Future updates will be necessary to establish a clear cadence.
Who built it?
User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Sunplan: Solar Forecast
How's the Utilities market?
Sunplan serves a specialized segment of the Utilities category, focusing on privacy-first solar forecasting. Its lack of monetization and account requirements differentiates it from cloud-dependent energy management tools.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Sunplan: Solar Forecast
Where is it heading?
The solar utility market is consolidating around platforms that offer automated grid-balancing and hardware control. Sunplan remains a stable, privacy-focused alternative, but its growth will likely plateau unless it bridges the gap between manual forecasting and automated home energy management.
- The app maintains a stable, maintenance-mode release cadence since its initial launch, suggesting a focus on core utility over rapid feature expansion.
The SWOT
- Local-first architecture removes account-based friction
- Physical irradiance model improves forecast accuracy
- Smart-home platform integration for automated scheduling
Next best moves
Ship smart-home integration because manual planning is the primary friction point → increase daily active usage
The counter-intuitive read
Users report: Sunplan's lack of cloud connectivity is its primary moat…
Read the full takeBottom line
Sunplan's privacy-first, local-only model provides a clear entry point for solar owners, but its lack of hardware connectivity limits its long-term retention. Integrating with smart-home ecosystems would unlock automated energy management, moving Sunplan from a planning tool to an active utility.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Sunplan compatible with my solar inverter?
Does Sunplan require an account to use?
What is the difference between Sunplan and a standard weather app?
Is there a paid version of Sunplan?
Sources
- [1] App Store
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