Sunfollower vs Star Exposure Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sunfollower
Visualize sunrise, sunset, and sun direction for any day and location. Features an interactive AR view to calculate sun positions and provides twilight times, elevation, azimuth, and shadow ratios.
- Sunrise and sunset position tracking
- Interactive Augmented Reality view
- Civil, nautical, astronomical twilight times
- Sun elevation and azimuth
- Shadow ratio calculation
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Sunrise, sunset and sun direction for any day at any location. Key features: - Instantly see how sunrise and sunset positions change throughout the year - Interactive Augmented Reality view screen. Tap on the screen and the application will calculate when the Sun is at that position. - Civil, nautical, astronomical twilight times - Elevation and azimuth of the Sun - Shadow ratio Notes: Maps require data connection. Please ensure that Compass calibration in the System Settings on your device is switched ON. The app will work more accurately with it. The Compass accuracy can be affected by magnetic or other environmental interferences.
Star Exposure Calculator
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Star Exposure Calculator is an app that helps you calculate the right exposure settings for pin-sharp stars in astrophotography. Features: • Calculate star exposure via simple or complete NPF rule for pin-sharp stars • Calculate star exposure via 500 rule • Calculate focal ratio of your telescope • Telescope magnification calculator • Maximum telescope magnification calculator • Telescope true field of view calculator We constantly update the app to provide more features that users are looking for, so expect even more with future updates.
Screenshots
Verdict
The clearest difference is price: Star Exposure Calculator at Free against Sunfollower's $2.99. Star Exposure Calculator also leads on update cadence (every 2 weeks vs every 4 months). Sunfollower's advantage is ads (none vs shown) and iOS requirement (10.0 vs 13.0). On in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Star Exposure Calculator is free to download; Sunfollower costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sunfollower ships an update every 4 months, Star Exposure Calculator every 2 weeks. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.
| Parameter | Sunfollower | Star Exposure Calculator |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.1 (12 ratings) — better | — |
| Positive reviews | 70.3% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 22 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Evgeny Vostrikov | Dejan Boras |
In-app purchases
Sunfollower
No in-app purchases
Star Exposure Calculator
No in-app purchases
Questions
Is Sunfollower free?
Is Star Exposure Calculator free?
Do Sunfollower or Star Exposure Calculator have ads?
Which is updated more often, Sunfollower or Star Exposure Calculator?
Other comparisons
