Suntain vs SunSpan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Suntain
Visualize the sun's position and trajectory based on your location and date. Get sunrise and sunset times, including when the sun appears or disappears behind terrain. Access annual data on daylight and sunshine duration.
- Sun position and trajectory visualization
- Horizon sunrise and sunset times
- Sunrise/sunset behind terrain
- Annual sunrise/sunset data
- Daylight and sunshine duration
- Sunshine duration analysis
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This application visualize position and trajectory of the sun, based on location and date. It provides: - Horizon (sea level) Sunrise and sunset time - Sunrise and sunset behind terrain/mountain: When sun appears and disappears! Annual information of the specified location is also available: sunrise and sunset along the year, daylight and sunshine duration for every day. On top of this, number of days with more (or less) than a specific amount of sunshine duration is available.
SunSpan
Visualize an entire year of daylight, sunrise, sunset, and twilight on a single, intuitive chart. Easily inspect daily solar times and phases by tapping or dragging across the visual representation. Offers detailed insights into seasonal changes and astronomical events.
- Full-year daylight chart
- Eight-stop twilight gradient
- Inspect daily solar times
- DST transitions marked
- Location picker via map/GPS
- Automatic time zone resolution
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SunSpan — A Year of Daylight on One Screen SunSpan renders an entire year of sunrise, sunset, and twilight as a single chart. Each day is a vertical band shaded from astronomical night through nautical and civil twilight into full daylight, so the seasonal curve, the solstices, the equinoxes, and effects like white nights and polar day are visible at a glance. Tap or drag across the chart to select any day and see its sunrise, sunset, daylight length, and twilight phase times in a detail bubble. Features - Full-year daylight chart for any location, any year from 1900 to 2100 - Eight-stop twilight gradient: night, astronomical, nautical, civil, day - Tap or drag any day to inspect sunrise, sunset, daylight length, and twilight phase times - DST transitions marked on the chart - Location picker via satellite map, or automatic from device GPS - Time zone resolved automatically from the selected coordinates - Localized in English, Spanish, German, and Ukrainian Privacy No accounts, no analytics, no ads. Location is used only on-device to compute solar geometry and never leaves the device.
Screenshots
Verdict
The clearest difference is update cadence: SunSpan at every 2 days against Suntain's every 4 months. Suntain's advantage is iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Suntain ships an update every 4 months, SunSpan every 2 days. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.
| Parameter | Suntain | SunSpan |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 54 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Jacques DUMAREST | Mykhailo Chelnokov |
In-app purchases
Suntain
No in-app purchases
SunSpan
No in-app purchases









