About Asof
Asof is a timestamp camera app for Android and iPhone. It prints the date, time, GPS position and street address on every photo, says where each of those values came from, and turns the photos from one job into a single PDF report. It is made by 55DIGITS LLC, a one-person company in Miami, Florida.
Why it exists
A phone photo carries its date and location in metadata that nobody sees, that most messaging apps strip, and that anyone can edit. When a contractor, a courier, a landlord or a Turo host has to show when a photo was taken, they end up explaining file properties to someone who only wants to look at the picture. The visible stamp is the fix: the date is on the image, and the stamp says how it got there — phone clock checked against a time server, GPS fix with its accuracy, address looked up or typed, stamp added at capture or later from the file. That last part is the point. A stamp that hides its source is worth less than no stamp.
The second reason is the way these apps are sold. Most jobsite photo tools charge per user per month and keep the photos in their cloud. Asof keeps photos on the phone, needs no account, and is paid for once.
How it is paid for
Taking stamped photos, saving them and sharing them is free, with no ads and no limit. One payment, made through Google Play or the App Store, unlocks PDF reports, before-and-after reports, drawing on photos, stamping photos already in the gallery, a company logo on the stamp, and CSV, ZIP and KMZ exports. There is no subscription. The store shows the price.
What leaves your phone
Photos, reports and signatures stay on the phone. The app sends the GPS position to the phone's own address lookup service to get a street address, asks a time server what time it is, and asks the store whether your account owns the unlock. That is all. There is no account and no analytics in the app, and no cookies on this website. The full list is in the privacy policy.
What Asof does not do
Asof does not decide whether a photo is proof of anything. It prints the date, time, address and coordinates the phone reported, says where each value came from, and warns when the phone clock disagrees with the time server, when Android reports a mock location, or when the GPS fix is more than 30 seconds old. It does not detect edits made to a photo afterwards, does not add checksums or hidden marks, and does not check whether a location is "correct" beyond showing the accuracy radius. Before and after photos are placed side by side in the report; the translucent "ghost" of the earlier photo appears only in the camera, to line up the shot. The PDF lists the sources of each value, not the file's full metadata. There is no account, no cloud, no team workspace and no subscription.
Who makes it
55DIGITS LLC is a Florida company based in Miami, run by one person who builds and supports the app. Asof is the company's product; the guides on this site are written in-house, with sources listed at the bottom of each one, and are checked against the pages they cite before publishing. Mistakes get fixed when reported.
Contact
Email: [email protected]. Bug reports and questions about a report that came out wrong get answered first.
Asof on Google Play and the App Store. Facts about how Asof compares with Timemark, Timestamp Camera and CompanyCam are on the comparison page.