What's in Sunline.

The full list. Free covers the complete real-time globe; Premium adds live cloud imagery, monthly seasonal textures, per-country time zones, and the simulation shuttle.

Free vs Premium.

Every row here corresponds to a real feature in the app. There's nothing aspirational on this list — if it's here, you can use it.

Feature Free Premium
The map
Real-time Sunline (day-night terminator)
Flat map and 3D globe views
Night-side darkness and NASA Black Marble city lights
Bundled cloud cover layer
Sub-solar and sub-lunar markers
Location marker and city/country label
Geographic (15°) time zone bands
Object-size slider for overlays
Cloud Land Alpha (one Cloud Tuning slider)
Zoom and pan in both flat and globe views
Live cloud cover from recent satellite imagery
Seasonal Earth textures (monthly NASA Blue Marble)
Political (per-country, IANA) time zone boundaries
Full Cloud Tuning panel (opacity, ambient, luminance)
Time
Real-time mode
Simulation mode (1900–2100, log-scale speed)
Speed presets (1m, 5m, 10m, 30m, 1h, 3h, 6h, 12h, 1d)
On-map Simulation Player — play / pause
On-map Simulation Player — drag-to-scrub shuttle
Natural shuttle direction
Seasonal textures while scrubbing in sim mode
Display, performance, support
Movable, sizeable clock with local + UTC time
Smooth time-lapse animation with automatic frame-rate pacing
Time-lapse timer (auto-return to Live after 5 min – 1 hr)
Battery warning on mobile while a time-lapse runs
Long-press the map to set your location
GPS auto-detect (mobile, with your permission)
Snap window to map aspect (desktop, flat map)
Fullscreen mode (F11 / Ctrl-⌘-F / Esc)
Reset map cache

Where Sunline runs.

Same app, same features, same look. A few small things are platform-specific by necessity.

iOS & iPadOS

Premium available through the App Store. Restore Purchases must be user-initiated (Apple's rule), so press the Restore button after reinstalling on a new device.

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Android

Premium available through Google Play. The app quietly reconciles entitlements in the background, so you usually don't need to press Restore manually.

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macOS, Windows, Linux

The complete free experience runs on desktop. Premium isn't currently sold through desktop builds; pair the same Apple or Google account on a mobile device if you want Premium today.