Construction photo log with date, time and location
Whoever pays for a renovation wants to follow the progress, and whoever runs the job needs to show they were there. Lymark writes the server-recorded time, the address and an issue code into every photo, and paints a verification strip into the image: the owner checks the photo they received, even if it came by message, email or social media.
When the owner doesn't trust the photo
Most of the time, the owner is nowhere near the site. What reaches them is photos: the slab poured, the plastering finished, the materials delivered. That is what each stage gets approved on, and what each payment is released against.
But an ordinary photo doesn't say when or where it was taken. The file's date comes from the phone's clock and tends to get lost on the way. A single doubt, “is this photo from another job?”, “was this really done today?”, is enough to turn the progress report into an argument.
How Lymark solves it
- Photograph each stage with Lymark. The site address comes from the device at the moment of capture, and you can adjust it before saving.
- The stamp writes the date, the time, the site address and an issue code into the image. When the photo is checked, the time that counts is the issuance time, recorded by Lymark's server, not the phone's clock.
- A verification strip, invisible to the naked eye, is painted along the longer edge of the photo and survives recompression. The photo goes to the owner by message, email or social media, and into the site log you already keep.
- The owner drops the photo into lymark.app/verificar and sees when it was issued and whether the copy is verified. No account and nothing to install, and the image never leaves the checker's device.
Strip enlarged here: in the real photo, the eye cannot see it.
What the check shows, and what it doesn't
It shows
- The stamp's code and the time at which Lymark's server recorded the issuance, independent of the phone's clock.
- Whether the photo is still the one that left Lymark: intact, when it is the exact file; verified, when it is a recompressed copy of the same scene.
- The distance between the address on the stamp and the GPS reported by the device, when the device reported its GPS.
It doesn't show
- That the work was done well, or that the scene is true. The date, time and address on the stamp are the photographer's declaration; Lymark records the issuance, not the work.
- That no pixel changed in a copy. “Verified” means the same scene within a tolerance, and a small edit can slip through. Keep the original files: only they are checked byte for byte.
- In a copy of a plain surface, such as fresh plaster, paint or a ceiling, there is little to compare, and the content may come out as “doubt”, which does not mean it was altered. It helps to get a window frame, a switch or a corner into the shot.
- Copies that are heavily reduced or cropped. Below roughly 600 px on the longer side, or without the edge that carries the strip, the copy comes out unverified, and screenshots are not guaranteed to read. Coming out unverified accuses nothing, but it confirms nothing either.
- It is not a notary and does not replace the site log. The log still belongs to whoever runs the job; Lymark provides the photos the owner checks.
Frequently asked questions
Does Lymark replace the construction daily log?
No. The daily log still belongs to whoever runs the job, in whatever format you already use. Lymark provides the photos that go into it, with the issuance time recorded by the server and a strip the owner can check. In the web app, each exported photo has a report you can print.
How does the owner know when and where the photo was taken?
The check shows the time at which Lymark's server recorded the issuance, which does not depend on the phone's clock, and the distance between the address on the stamp and the GPS reported by the device, when the device reported it. A photo issued on Monday cannot have been taken on Tuesday and backdated. The address and capture time printed on the stamp are the photographer's declaration.
Does the owner need an account or an app to check?
No. Just open lymark.app/verificar in a browser and drop in the photo. It is read on the checker's own device: the image is never uploaded.
What if I send the photo by message, email or social media?
It can still be checked. Those routes tend to recompress the image and strip its metadata, and the verification strip, painted into the pixels, survives that. The check says whether the copy matches what Lymark signed. Copies below roughly 600 px on the longer side, or cropped at the edge that carries the strip, come out unverified, which accuses nothing.
How much does it cost to start?
Nothing. The free plan has 15 captures a month, no card required. And whoever receives the photos checks them without an account.
Start free
15 captures a month, no card. Shoot the next stage of the job with a recorded time and send it to the owner however you like.