After an accident.
When it’s safe, photograph the damage and surrounding details.
FactLockCam · For your phone
What if the file everyone trusts isn't the original?
Be able to prove later whether a file has changed.Be able to prove later whether a file has changed.FactLock it.
Proof of the exact photo or video you FactLocked, at the time of the public transaction that recorded it. Anyone you share it with can check that proof free at https://factlockcam.com/open/. For larger files, use the Free Mac Proof Utility.
Saving or sending a file is not proof that a later copy still matches. FactLock it, and you have proof you can check.
Try FactLockCam free. Sign in and get 5 FactLocks at no cost (5 in total, shown as “seals” in the app). If you like it, Plus is $5.99 a month or $49.99 a year.
Renews automatically. Cancel anytime in your store account.
Paid plans are billed through the App Store or Google Play.
Download on the App Store or Google Play. In-app purchases available.
Illustrative scene FactLock record MATCH
Fingerprint · SHA-2569f2c 81ab … 0d7e 41c3
File type · sizeimage/jpeg · 2.4 MB
Capture time · device-reported2026-11-02 09:14 UTC
SignatureValid
File checkMatches its record
Illustrative readout · not a customer record
The world has spent decades protecting files from being stolen. Now we need to protect our ability to prove what those files originally contained. FactLockIt — Preserve. Protect. Prove.
A match means the checked file still matches its FactLock record. It does not tell you whether a claim or photo is true.
Everyday moments · illustrative, not customers
Record the details now. Show them later.
Before you move out.
Photograph each room before you hand back the keys.
When damage needs documenting.
Take the photos while the details are still in front of you.
How it works
How it works
01
FactLock it.
You get proof of that exact file, at the time of the public transaction that recorded it.
02
Share the file and its proof.
03
Check the proof free online at https://factlockcam.com/open/.
For larger files, use the Free Mac Proof Utility. A free Windows utility for larger files is not available yet.
The Free Mac Proof Utility is the Free FactLockFile Viewer for Mac.
The check runs on your device. The file is not uploaded. Only the proof’s record ID is looked up online.
The check
One changed detail can change the story.
A move-out photo. Water damage. A repair photo. Changes can be accidental or deliberate. Compare a shared capture with its FactLock record to check whether the file bytes match.
Change the file. The match breaks.
Original · FactLocked
SHA-256
Checking the served file…
Changed copy
SHA-256
Checking the served file…
A match means the checked file’s fingerprint matches the fingerprint in the record. It does not establish who created the file, whether the scene is true, or when or where it was captured. The comparison does not explain who made a change or why, establish an uninterrupted custody history, prevent intrusion, or replace backups and other supporting records.
Illustrative readout · not a customer record
Check
Protect what matters. Prove what hasn't changed.
Received a file? Check the proof free online at https://factlockcam.com/open/. For larger files, use the Free Mac Proof Utility.
Your Archive
Your captures. Your Archive.
Your files are yours. Keep your own backups.
FactLockCam sends fingerprints and record details—including capture time, file type, size, signatures when available, and account-linked identifiers—to its servers. Sending requires the original capture and its device key. Offline records may be incomplete.
Shared proof files may include an unencrypted, readable certificate with a title, description and location. Review what you share. Anyone with the encrypted .flcproof package and its required password or unlock key can open it.
Captures stay on your phone
FactLockCam keeps captured photos and videos on your phone rather than uploading them to its servers.
Your files are yours
If your subscription ends, captures already in your Archive stay on your phone. Your plan sets how many new FactLocks you can make.
Send Proof from your Archive
Open a capture in your Archive and use Send Proof to prepare a package for sharing.
Pricing
Start free. Upgrade in the app.
Subscribe in the FactLockCam app. Billed through the App Store or Google Play.
Free
$0
5 FactLocks, lifetime
Start freeDownload on the App Store or Google Play
Standard
$2.99/month
$29.99/year
10 FactLocks per month
Subscribe in the appBilled through the App Store or Google Play
Plus Recommended
$5.99/month
$49.99/year
20 FactLocks per month
Subscribe in the appBilled through the App Store or Google Play
Pro
$12.99/month
$129.99/year
See current in-app plan terms
Subscribe in the appBilled through the App Store or Google Play
See all plans, yearly prices and the Incident Pack
Prices in USD; local prices may vary.
FAQ
Questions, answered plainly.
What does a match mean?
The checked file’s fingerprint matches the fingerprint in the record. This does not establish whether the scene is true.
Can a photo timestamp be faked?
Yes. Photo timestamp metadata can be changed. A file check compares a file with its FactLock record; it does not establish capture time or whether the scene is true.
Get FactLockCam.
Download on the App Store or Google Play. In-app purchases available.