Sentinel-2 Clear Days
Satellite timelapse films
Only for iPhone
$1.99 · Designed for iPhone. Not verified for macOS.
iPhone
New: corner inlays with leader lines, your area name beside the date, My Location, quick date presets, and named film export for your satellite timelapses.
Sentinel-2 Clear Days helps you find low-cloud Sentinel-2 days over a place you care about, build a scrubbable timeline, and export a short film.
Draw or drop an area on the map (or use presets such as Starbase, Colossus, and Cape Canaveral). Scan public Sentinel-2 L2A imagery for clear dates, review cloud/shadow/granule stats, build a timeline, play it at 1–12 frames per second, and export a film that matches that preview speed. Optional inlay box or circle and MGRS or lat/long burn-in on composed frames.
Features
• Area and inlay tools (box or circle) on Apple Maps
• Place search and km-sized drop presets
• Clear-day scan across the Sentinel-2 era (or shorter windows)
• Timeline scrub, play speed, and film export
• On-device stacks—no Marshall Frith account or backend
Network: the app queries the public Element84 Earth Search STAC API (sentinel-2-l2a) and downloads Cloud-Optimized GeoTIFF windows from the asset URLs returned; place search may use OpenStreetMap Nominatim; the basemap uses Apple MapKit.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Name the area you are filming. That name sits beside the date on the preview and in the exported film, and the timeline stays to the right of the name.
Turn the inlay on or off. When it is on, a red outline marks it on the map, the preview, and the film. Move it to any corner. Leader lines connect the source box to the enlarged inset. A longer side of 8 km holds two inlays, and 12 km holds three. One corner stays clear.
Center a timelapse on where you are. Location is used only while the app is open, one fix at a time. It is not tracked, and the app does not ask for Always.
From and To sit with the date presets: 2017 → now, Last year, and Last 45 days. Name the film you export. The default file is still s2-timeline. Rebuilding a shorter date range, including a single day, no longer crashes. Choosing a place (Starbase, Colossus, or Cape Canaveral) starts a fresh box and clears the previous inlay and area name. Selecting the inlay no longer freezes the page.
The developer, MARSHALL TYLER FRITH, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MARSHALL TYLER FRITH
- Size
- 2.5 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Loot Boxes
- Copyright
- © 2026 Marshall Frith

