Take Progress Photos That Are Actually Comparable

Why a checklist rather than a camera

A progress photo is worth nothing on its own and a great deal as a series. A series only holds together if every angle is shot every time — a front shot in January and a side shot in March compare nothing.

So the flow is a checklist: front, side, back, most muscular, in order, with progress crossed off at the top as each lands.

Progress is derived from the database against a watermark taken when the screen opened, not from component state. That means re-shooting a pose reads as done, and a crash or an interruption mid-set resumes correctly rather than starting over.

The ghost overlay

The previous shot of the same pose, at 25% opacity over the live preview.

This is the feature that makes progress photos worth taking. Two photos at different distances, angles and heights cannot be compared no matter how good each one is — apparent size changes with distance, and lighting from a different direction changes everything about how a physique reads.

Line yourself up with the ghost and the series becomes a genuine record of change rather than a record of where you happened to stand.

Practical notes that matter as much as the overlay:

• Same room, same time of day, same lighting
• Same distance — the ghost handles this if you use it
• Same state — morning, before food, is the repeatable one
• Same clothing

Where to start a set

Two routes, and the second one is the one that actually builds a habit:

• Progress Photos, then New Set
• The workout summary, which offers a progress photo action after every session

The summary route exists because of timing. The moment after training is the one you reliably remember, and a habit anchored to an existing habit survives where a standalone one does not. Once photos exist for a session, the summary shows them as thumbnails and names any poses still missing.

Comparing

The compare screen locks to one pose and lets you pick two dates within it. It shows days apart and the trend weight at each shot.

An earlier version let you pair any two photos and warned when the poses did not match. Choosing the pose first makes the mismatch unreachable instead of merely discouraged, which is the better design for the same reason a stepper that cannot land on an unloadable weight is better than one that warns you.

Each individual photo also carries the two facts that make it a data point rather than a snapshot: the date, and the trend weight it was taken at. Stepping left and right from a photo stays inside its own pose.

Importing existing photos

The import flow reads each photo's EXIF date, so it is normally a glance and one confirmation. Anything without a usable date is called out explicitly rather than quietly filed under today — a photo from eight months ago silently dated today would corrupt the series it was meant to join.

You assign the pose before anything lands in the gallery.

Photos never leave the device

This is the one place Base's privacy story is stricter than the rest of the app.

Everything else — food, training, weight, health data — syncs to a private database under your account, so losing the phone does not lose your training history. Progress photos are the deliberate exception. They are never uploaded.

Because the app's own storage is destroyed when an app is deleted, photos are archived to your own photo library instead, which is what survives a reinstall. There is a dedicated backup screen showing the count out loud, because a backup whose state you cannot see is not a backup.

Full detail in what Base does with your data.

Common mistakes

Not using the ghost. Without it the series is a folder of unrelated pictures.

Shooting only the front. The front changes least and hides the most.

Different lighting each time. It changes the apparent result more than a month of training does.

Shooting at random times. Morning before food is repeatable; evening after dinner is not.

Shooting weekly. Too frequent to show change and frequent enough to be discouraging. Monthly is about right.

Assuming the app's own storage is a backup. Deleting the app destroys it. The photo-library archive is what persists.

What to do next

Shoot a full set today, even if you are not happy with where you are — it is the baseline everything afterwards is measured against, and there is no way to create it retroactively.