AstroSol is a solar calculator for iOS that computes solar noon, sunrise, sunset, and elevation using offline-capable geometric algorithms.
The App DNA
What makes this app unique?
It removes the dependency on cellular connectivity for field-based planning, allowing users to calculate solar positions in remote locations where standard weather apps fail.
For Users requiring precise, offline-capable solar data for educational, photography, or field-based planning.
What does it look like?
Key features
Bundled city and time-zone database enables location-based solar calculations without internet connectivity.
Implements Jean Meeus-style algorithms and NOAA rounding conventions for solar noon, sunrise, sunset, and elevation.
How much does it cost?
AstroSol is distributed as a free utility with no observed monetization, ads, or subscription gates.
Velocity
Dormant developmentUX improvementsinternationalizationShow more...
AstroSol has been inactive for 307 days, placing it firmly in the zombie category. The latest release, which introduced geometric elevation calculations and minor UI refinements, remains the only version in the observed window. There is no evidence of ongoing development or operational support for the application.
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 AstroSol
How's the Weather market?
AstroSol operates as a specialized utility within the Weather category, relying on scientific accuracy rather than social features. The lack of recent updates and review volume suggests a low-visibility position compared to broader, ad-supported weather platforms.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for AstroSol
Where is it heading?
The weather and utility market is consolidating around apps with high-frequency update cycles and social integration. AstroSol's current trajectory is stagnant, which will likely lead to a loss of visibility unless the developer resumes a regular update cadence to signal active support to the store algorithms.
- The 10-month development silence suggests a maintenance-only posture, which limits the ability to respond to user feedback or evolving platform requirements.
- The offline-first architecture remains a defensible differentiator for field-based users, provided the underlying solar algorithms remain accurate and compatible with current iOS frameworks.
The SWOT
- Offline-first architecture via bundled gazetteer removes connectivity dependencies for field-based solar planning.
- Scientific accuracy derived from Jean Meeus-style algorithms and NOAA rounding conventions builds trust for professional use.
- Integration of augmented reality (AR) overlays for solar path visualization could differentiate AstroSol from static calculator rivals.
Next best moves
Audit current solar math engine against latest NOAA standards because the app has been silent for 10 months → maintain scientific accuracy
The counter-intuitive read
The lack of updates is a feature, not a bug…
Read the full takeSince the last report: The competitive outlook shifted from stable to mixed as the 10-month development silence is now explicitly framed as a threat to long-term market relevance. No functional changes were made to the feature set or pricing model.
Bottom line
AstroSol provides a reliable offline utility, but the 10-month development silence risks its relevance in a category that rewards frequent updates. Maintaining the math engine's accuracy is the only way to defend its niche position against more active competitors.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Does AstroSol work without an internet connection?
Is AstroSol suitable for professional photography planning?
Does AstroSol contain ads or in-app purchases?
Sources
- [1] App Store, source
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