Progress photo comparison tool
Put two check-ins next to each other, lay one over the other like a film negative, or swipe between them. Your photos stay on this device.
Photos are shrunk to 1600px and saved in your browser. Nothing is uploaded.
Opening your photo vault…
Three ways to compare progress photos
Side by side
The classic before-and-after. Good for overall shape and posture, and the format coaches expect. Use the alignment controls so both frames show you at the same size.
Ghost overlay
The after photo sits on top of the before at adjustable opacity, tinted red so the two outlines separate. A waist that has come in by two centimetres is hard to see side by side, but shows up as a clear double edge in overlay. This works best when both photos were taken from the same spot. Here’s how to do that.
Swipe
Drag the tape-measure divider across the frame to wipe from before to after. Your eye catches movement, so slowly dragging over the midsection or shoulders makes changes jump out.
Photos are only one of three signals
Photos catch what the scale misses, but lighting and a pump can flatter them. Pair them with tape measurements and a 7-day weight average. When all three point the same way, the change is real.
Questions people ask
Are my progress photos uploaded anywhere?
No. Photos are resized on your device and stored in your browser’s IndexedDB storage. They never leave your phone or computer, which is why there is no account. Clearing your browser data, or the “Delete all photos” button, removes them.
What is a ghost overlay?
The after photo is laid over the before photo at partial opacity, like an onion-skin in animation. Where your outline has changed you see a double edge, which makes small changes to the waist, shoulders or back far easier to spot than two photos next to each other.
How do I line up two photos that were taken from slightly different distances?
Open “Line up the after photo” and use zoom and nudge until fixed points, such as a door frame or your feet, match in ghost mode. For future photos, mark the floor where you stand and keep the camera at the same height.
How often should I take progress photos?
Every 2–4 weeks is enough. Visible change is slow; weekly photos mostly record lighting and water differences. Take them on the same weekday, at the same time of morning.
Can I share a before-and-after picture?
Yes. “Download comparison JPG” builds a single side-by-side image with both dates and the number of days between them, ready for a coach or social post. It is generated on your device.