TamperCheck: Photo Compare

Your roommate says they didn't touch anything. Prove them wrong.

TamperCheck is a change detection camera. Take a photo of your desk, your shelf, your drawer, whatever you want to keep tabs on. Come back later, take another. The app aligns the images and shows you what's different.

It doesn't just put two pictures side by side. It actually corrects for the fact that you weren't standing in the same spot both times.

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HOW IT WORKS
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1. Take a reference photo of your space
2. Come back later, take a comparison photo
3. The app aligns them and finds what changed
4. Changed areas show up highlighted in red

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SMART ALIGNMENT
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Other "before and after" apps need you to hold your phone in the exact same position both times. Good luck with that.

TamperCheck uses the same feature-matching algorithm used in professional image analysis to find common points between your photos, then warps one to match the other's perspective. Different angle, different distance, still works.

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WHAT THE DETECTION DOES
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More than pixel comparison:

★ Diffs each color channel separately. Catches a red-to-blue swap that grayscale would miss.
★ Adapts to uneven lighting. A bright lamp in one corner won't throw off the whole result.
★ Runs the check at two scales, keeps only what shows up in both. Filters out noise.
★ Uses structural similarity (SSIM) to ignore lighting shifts where nothing actually moved.

Three sensitivity levels: Low for big changes, High for subtle ones.

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YOUR PHOTOS STAY ON YOUR PHONE
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No account. No cloud. No server on our end.

All image processing happens on your phone. We built it that way on purpose. We can't see your photos.

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WHO THIS IS FOR
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★ Shared apartments. Settle the roommate argument with evidence.
★ Your desk. Did someone go through your stuff while you were out?
★ Hotel rooms. Take a photo when you check in, check it when you get back.
★ Luggage. Take a photo of the bag before the flight, check after.
★ Insurance. Before-and-after property records.
★ Storage units. Periodic checks that nothing's been moved.

Recent changes:
Added an analytics opt-out toggle in Settings. Minor stability improvements.