Diana is a lunar phase and celestial event tracker for iOS that uses GPS or manual location data to display moon cycles and sunrise/sunset times.
The App DNA
What makes this app unique?
Users track lunar cycles for astronomy or personal scheduling, and they prefer Diana for its alignment with official observatory data over less precise alternatives.
For Astronomy enthusiasts and users requiring location-based celestial data for calendar tracking.
What does it look like?
Key features
Graphical display of waxing and waning phases based on location data.
Calculates precise rising and setting times for the Sun and Moon.
How much does it cost?
Diana operates as a free utility with ad-supported monetization, despite persistent user requests for a paid ad-free tier.
Velocity
Dormant developmentplatform expansionperformanceShow more...
Diana has reached a zombie state, with no updates or feature releases in the last 1,286 days. The development cycle has been completely inactive for over three years, indicating the project is no longer receiving maintenance or support. The final recorded update focused on basic platform compatibility and library maintenance, with no subsequent activity observed.
Who built it?
sorakaze
9 apps tracked · Weather
そら案内
ThumbCamera - gesture camera
ColorBalls - Simple Puzzle
WeatherJapan
そら気温
そらレーダー
月読君
そらコーデUser Sentiment
What do users think recently?
Fresh user feedback skews mixed. Users appreciate the simple and clean interface provides a fast way to view sun and moon cycles and precise astronomical calculations provide reliable data for users checking against official observatory sources.
How are ratings & reviews evolving?
What users say, by theme
- The simple and clean interface provides a fast way to view sun and moon cycles
- Precise astronomical calculations provide reliable data for users checking against official observatory sources
- iPad specific interface layout provides a comfortable viewing experience for tablet users
- The introduction of advertisements spoils the previously clean and uncluttered user experience
23 of 23 recent reviews analyzed · moderate confidence · Mixed overall
Read the full review analysisUnlock 2 more frustration themes and 3 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Diana
How's the Weather market?
Diana maintains a 3.5-star rating across a small sample of reviews. The lack of updates for over 1,200 days places it in a maintenance-only position within the Weather category.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Diana
Where is it heading?
The celestial utility market is shifting toward feature-rich, notification-driven experiences that Diana currently lacks. Without a pivot to a paid model or a resumption of development, the app will continue to lose its competitive standing to more active rivals.
- The 1,287-day update gap suggests the app is in maintenance mode, which prevents it from addressing user requests for notification features.
- User frustration with the introduction of ads into a previously clean interface is driving negative sentiment and app deletions.
The SWOT
- Astronomical calculations match official naval observatory data
- Paid ad-free tier would monetize existing user base
Next best moves
Ship a paid ad-free tier because users explicitly request it to restore the clean experience → increase monetization
+ 1 more prioritized moveThe counter-intuitive read
The lack of updates is not just technical neglect…
Read the full takeSince the last report: The app remains in a stagnant maintenance state, with the primary change being the formalization of missing notification features as a key user-requested gap.
Bottom line
Diana's core astronomical accuracy remains a strong retention hook, but the ad-supported model without a paid alternative is actively eroding the user base. Introducing a paid tier would unlock revenue from the existing loyal audience.
Unlock 2 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Diana accurate for astronomical planning?
Can I remove the advertisements in Diana?
Does Diana provide sunrise or sunset notifications?
Sources
Report last updated