Completely changed my astrophotography
PrimeHour helps me know whether to stay up late or not by telling me if I’ll have windows of clear skies for astrophotography! Highly recommend!
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Plan photography trips with AI-powered location scoring based on sun, moon, and weather. Generate shot lists, optimize timing for golden and blue hour, and receive gear recommendations. The app works offline and provides weather alerts.
✓Multi-stop itinerary planning on map
✓AI-generated photography spots with light scores
✓Live sun & moon compass
✓Automatic daily schedule with 'set up by' times
✓AI gear & camera settings recommendations
✓Offline-first functionality
✓Weather-change alerts
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What's New in PrimeHour
1.7.0
July 29, 2026
A far smarter shot score. The engine now reads conditions through the lens of your shot: its light, its style, its subject. A breeze that ruins a macro shot no longer dents a cityscape, and the same high cirrus that kills an astro night is what makes a sunset. Scores are consistent on every screen and lock in once a shot is taken. See further ahead. Ensemble weather models and climate history now score shots well past the 10-day forecast, and tell you honestly how much to trust them. Astrophotography, properly. True astronomical darkness, moon height rather than just phase, the Milky Way core's real position, light pollution, and dew risk. UI updates and performance improvements.
MoreSubscription plans
PrimeHour Pro - Monthly
Unlock unlimited trips, full forecasts, and gear info.
$4.991 Month
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FAQ
What is PrimeHour?
PrimeHour is a photography trip planner that helps you schedule shoots by scoring locations based on sun, moon, and weather conditions. It provides shot lists, timing for optimal light, and gear recommendations.
How does PrimeHour score light?
PrimeHour scores light on a 0-100 scale by combining sun angle, cloud cover, and weather forecasts. It provides a clear, plain-language explanation for each score.
Can I use PrimeHour offline?
Yes, PrimeHour is built with offline-first functionality. Sun, moon, schedules, and scores compute on-device, ensuring usability in areas with poor or no internet connection.
What features are included in the free version of PrimeHour?
The free version allows unlimited trip planning with up to five shots per trip, light scoring based on sun, moon, and weather, and access to the live sun & moon compass and nearby spots.
What does PrimeHour Pro offer?
PrimeHour Pro unlocks AI gear & camera settings, unlimited AI-generated photo spots, the full 10-day forecast, automatic daily schedules with calendar sync, and best-window finding across your entire trip.
How much does PrimeHour Pro cost?
PrimeHour Pro is available for $4.99 per month or $39.99 per year. The annual plan includes a 7-day free trial.
How do I cancel my PrimeHour Pro subscription?
Subscriptions auto-renew unless canceled at least 24 hours before the current period ends. You can manage or cancel your subscription anytime in your App Store account settings.
What devices does PrimeHour support?
PrimeHour is supported on iPhone and iPod devices, with an age rating of 4+.