#1 AeroBusiness, #2 Starship Lander, #3 MeasureGeo, #4 Improv, #5 NDVI Scope, article Finding pilots without emitting RF -- Combat Search and Rescue (CSAR) RF flashlight from space, on X https://apps.apple.com/us/app/sentinel-2-clear-days/id6819667305 If you like seeing change detection, made a cool app now available on iOS ($2 one time) for anyone doing #OSINT to create Sentinel 2 (multispectral) timelapses/change detection. Helps you see before you spend money from higher resolution commercial vendors. Many thanks to @SoarAtlas for the inspiration. Will be rolling out more improvements over the next week or two. CC: @bradyafr @tom_bike @GeoConfirmed @zarGEOINT @Nrg8000 @planet @vantortech @umbraspace @iceye_global @Osinttechnical @RALee85 @FaytuksNetwork @thewarzonewire @elonmusk Made with the help of @bot @grok and @cursor_ai

#1 AeroBusiness#2 Starship Lander#3 MeasureGeo#4 Improv#5 NDVI ScopeArticle Finding pilots without emitting RF -- Combat Search a...On X https://apps.apple.com/us/app/sentinel-2-clear-days/id681...
Marshall Frith

iOS · Live on the App Store

Sentinel-2 Clear Days

A Sentinel-2 clear-day timeline viewer that runs on your device. Pick an area, scan for low-cloud dates, build a scrubbable stack, and export a film. No account, ads, analytics, or Marshall Frith backend.

Get it on the App Store
Marshall Tyler Frith

Sentinel-2 Clear Days (engineering product S2Inlay) helps you find clear Sentinel-2 days over a place you care about, scrub the timeline, and export a short film with optional burn-in captions.

This page is the App Store Support page. The write-up is When Did This Ground Change?.

What it does

  • Draw or load an area on the map (presets such as Starbase / Colossus / Cape are included).
  • Scan public Sentinel-2 L2A imagery for clear dates in your range.
  • Build a timeline, play it at 1–12 frames per second, and export a film that matches that preview speed.
  • Optional inlay box/circle for a fixed footprint across dates; MGRS or lat/long burn-in on export.

Privacy

Privacy Policy — no account, sign-in, ads, or analytics SDK. Scans and map lookups leave your device toward public imagery and geocode services; Marshall Frith does not run a Sentinel-2 Clear Days backend that stores your areas or films.

Support

Questions, bug reports, or App Store review contact go through the contact form. Messages reach Marshall Frith directly. There is no in-app chat or ticket system.

Requirements

iPhone, iOS 18 or later. An internet connection is required to search and download Sentinel-2 imagery and to geocode place names. Saved areas and built timelines stay on your device until you delete them or the App.

App Store

Price $1.99 · iPhone · Bundle com.marshallfrith.prototype.s2inlay

Sentinel-2 Clear Days on the App Store