#1 Improv, #2 Morse, #3 Kompressed, #4 Ship Finder, #5 High Altitude Balloon Path, article When Satellites Go Quiet, People Notice, on X Watch Agadez grow (be built), then handed back, to now. Northern Niger. Keep on eye on it!

#1 Improv#2 Morse#3 Kompressed#4 Ship Finder#5 High Altitude Balloon PathArticle When Satellites Go Quiet, People NoticeOn X Watch Agadez grow (be built), then handed back, to now. N...

Marshall Frith

ChangeLens Earth

iOS app for fast, honest before-and-after comparisons of any place on Earth, built on free Copernicus Sentinel imagery. Version 1.0.1, live on the App Store.

Oct 28, 2026SatelliteiOSApp Store

Get ChangeLens Earth on the App Store — iOS, version 1.0.1. Seller Marshall Tyler Frith.

Try the Grok Bot version.

ChangeLens Earth makes fast, honest before-and-after comparisons of any place on Earth. Pick a place and two dates, and see what changed side by side. The imagery is free Copernicus Sentinel satellite data.

ChangeLens Earth before-and-after Sentinel-2 comparison near Buqayq

Tell me what you think. If a comparison looks off, or you have an idea for it, send it through the contact form. I read every one.

Looking for the code?

It is not published. These are personal builds, and what is here is the write-up rather than the repository.

The iOS app is live on the App Store.

If you want to read the source or run the full desktop tool, ask. Say what you are doing with it and I will usually send it over.

Ask for the code

A blue furry token monster eating tokens spilled from a Mac Studio

Tips appreciated to feed the token monster of Grok / Claude / Cursor

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