Satrelle is an offline-first eclipse planning tool for photographers and observers on iOS.
The App DNA
What makes this app unique?
The app removes the connectivity dependency for eclipse timing, allowing users to plan in remote, off-grid locations where signal is unavailable.
For Eclipse observers and photographers requiring precise, offline timing and exposure planning for total solar eclipses.
What does it look like?
Key features
Calculates contact times C1-C4 using NASA Besselian elements locally without internet connectivity.
Computes Espenak exposure tables based on aperture, ISO, and filter, with live atmospheric extinction.
Provides timed voice callouts, camera-filter warnings, and haptic alerts through all four contacts.
How much does it cost?
The one-time purchase model for the Photographer's Kit serves as a direct conversion lever for professionals, avoiding subscription fatigue.
Velocity
Maintenance developmentnew contentUX improvementsShow more...
The app maintains a maintenance cadence, having shipped only one release in the last 23 days. Development is currently focused on high-precision technical features, specifically integrating NASA lunar data and site-specific elevation for eclipse timing. Given the current release frequency, the app is not currently operating on a high-velocity or live-ops model. Future updates are expected to follow this infrequent, feature-focused pattern.
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 Satrelle - Eclipse Planner
How's the Photo & Video market?
Satrelle occupies a niche in the Photo & Video category, targeting professional eclipse photographers with a one-time purchase model. The lack of a subscription requirement differentiates the app from broader utility rivals, though the current lack of user ratings limits its discovery potential.
Read the market outlookThe rivals identified
Unlock the deeper market read.
Access the full report for freeThe Analyst's Read
Key takeaways for Satrelle - Eclipse Planner
Where is it heading?
The market for specialized eclipse planning tools is highly seasonal and event-driven. Satrelle's success depends on its ability to capture professional photographers during the 2026 and 2027 eclipse windows.
- The maintenance-mode release cadence suggests the developer is focused on stability rather than rapid feature expansion.
- The offline-first architecture provides a clear value proposition for the target audience of remote eclipse observers.
The SWOT
- On-device computation enables full functionality in remote, off-grid locations.
- One-time purchase model avoids subscription fatigue for professional users.
- Specialized exposure toolkit computes Espenak tables with live atmospheric extinction.
- Expanding the Photographer's Kit to include non-eclipse astronomical events.
- Localized marketing in regions where 2026 and 2027 eclipses are visible.
Next best moves
Solicit reviews from early adopters because the lack of social proof is a primary barrier to entry → increase install velocity.
The counter-intuitive read
The lack of a subscription model is a risk: without recurring revenue…
Read the full takeSince the last report: The developer has pivoted from a pure maintenance-mode feature roadmap to a growth-oriented strategy focused on overcoming discovery friction caused by a lack of user ratings.
Bottom line
Satrelle's offline-first architecture is a defensible barrier for users in remote eclipse-viewing locations. Prioritizing social proof through user reviews would address the discovery friction currently limiting the app's growth potential.
Unlock 2 critical frictions, 2 market threats and the analyst’s take.
Access the full report for freeFAQ
Does Satrelle work without an internet connection?
Is the Photographer's Kit a subscription?
What is the difference between the free version and the Photographer's Kit?
Sources
- [1] App Store listing, source
Report last updated