For every action...
Digital Sentry monitors your system for specific events, and then can perform a vast array of unique actions in response. Use it to automatically cleanse internet history when closing a browser, automate redundant computer tasks, perform covert surveillance, or even protect your sensitive data during unauthorized access or theft!
Monitor numerous system events
Watch for such system events as waking from sleep, program launches, closes, or switches, file modifications, incorrect password attempts, mouse and keyboard input, and many more. Then, perform any number of tasks like sending an e-mail, shutting down the computer, starting a simulated self-destruct, pinging a web URL, taking a web cam shot, taking a screenshot, playing a multimedia file, speaking some text, executing a shell script... the list goes on!
Anti-theft protection
Curious who's been using your computer while you make a quick trip out of the room? Turn on the 'incorrect password' attempt monitor, and have Digital Sentry take a picture of them with a web cam, e-mail it to you, and then sending you a notification by text message to your cell phone! Ideal for catching a thief in the event your laptop has been stolen.
Countless uses
Alternatively, use Digital Sentry to organize your life by performing a task such as speaking a line of text on an interval to remind you to get up from the computer and stretch, or to perform a system backup. In the case of a backup, then even get Digital Sentry to do it for you by executing a shell script.
Comprehensive feature-set
Event Monitors
- An application was launched
- An application was been put foremost
- An application was closed
- A file was modified, renamed, or deleted
- An incorrect password was entered at the login prompt
- Some key was pressed
- The mouse was clicked or moved
- The mouse wheel was moved
- The system is about to go to sleep
- The power source was changed
- The computer woke from sleep
- Digital Sentry was opened or closed
- The computer was dropped, shaken, or moved
- Fast user switching (user activated/deactivated)
- An amount of time has passed
Actions
- Execute a shell script
- Display a fake security alert
- Record a note to a log
- Logout the current user
- Open a file, folder, or application
- Ping a URL with information
- Play a multimedia file
- Restart the computer
- Begin a stoppable or unstoppable self-destruct
- Send an e-mail (with web cam shot and/or screenshot)
- Send a text message to a cell phone
- Shutdown the computer
- Put the computer to sleep
- Display a system alert
- Speak some text
- Take a screenshot
- Take a web cam shot
Other Features
- Keystroke logging
- Internal program event logging
- Automatic startup on login
- Program password protection
Licenses to suit your needs

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Single-user or One Computer
- Price: US$19.95
- Intended Use: 1 User/1 Computer
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Student
- Price: US$9.95 (must provide valid Student ID)
- Intended Use: 1 User/1 Computer
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Family Pack
- Price: US$49.95
- Intended Use: 5 Users/5 Computers
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Educational Institution
- Price: US$79.00
- Intended Use: 90 Users/90 Computers
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Business
- Price: US$99.00
- Intended Use: 150 Users/150 Computers
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World
- Price: US$295.00
- Intended Use: 300 Users/300 Computers
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| More details on license types can be found on our License FAQ. |
User Reviews
"Excellent app! I use it to lock my computer whenever I leave it unattended and don't want anyone screwing around with it. Very handy feature. (iAlertU is similar but I've found it freezes up when I try to disarm my computer if it's been locked for an extended period of time, so then I'm just stuck with a very loud locked computer until I can manage to force shut the whole thing off. Absolutely no fun!)" — Daisy Keller
"I feel so much safer since installing this app. No one can get away with anything on my computer without me knowing about it. I can put monitors on anything I want! So go ahead. Just try and screw around. I dare you." — Pete Stucco
"I feel like I have a digital guard dog living inside my computer now. It's really a great feeling to know that all your data is protected, even under the worst of circumstances. This app seriously needs to be more widely recognized. In my opinion, everyone should own a copy." — Jim Hoffstadt
"I like how you can not only assign monitors and trackers to every part of your computer, but additionally you can also password-protect the actual app itself. That's double the security. You can't even force quit the app without needing to enter a password! This whole app has been very well-thought out and perfectly executed. 10/10." — Peter Trim
"I've never ever seen another application do what this app can do. Some features have been covered here and there, but never all in the same place. If you're looking for the app that does everything in one go, this is the one for you. And even if you're not, then whatever you're looking for is bound to be here anyway." — Mark Bookman
"I love the self-destruct feature. You can use it to either bluff a self-destruct or set it to do the real thing in case someone is about to gain access to an important file or folder in your computer that is for your eyes only. Clever and effective feature, indeed." — Jeffrey Cann
"Straightforward and easy to figure out, yet extremely effective in every way possible. Anyone can figure this app out, unless of course you're an intruder - and you're hooped if you're on that side of the coin. Well played. I recommend this one to every Mac user out there, hands down." — Jennifer Keimig
"Incredible. There's a lot of complex programming at work here behind every simple click of a button. I'm surprised this app only costs $20 for all the work that must have been put into it. Extremely cost-effective, especially when you consider security of this level to be absolutely priceless. I know I do." — Charlie Gunther
"Growing up, my dad used to tell me that "an ounce of prevention is worth a pound of cure." I always took that to heart, and Digital Sentry is like the embodiment of that saying in the modern computer world. Best of its kind. Well done, Koingo. If my dad was around today, I'm sure he'd be proud." — Jack Forest
"Endless possibilities here. Such a quiet little application that runs in the background - delightfully deceitful considering how powerful the app actually is." — Cynthia Sellars
Detailed list of changes
Version 1.3.4
- This version is designed for Mac OS X 10.6 or later only. Versions for older systems can be downloaded on our web site.
- Version 1.3.4 — March 13, 2013
- Bug Fix: Fixes potential crash on launch on some sytems.
- Version 1.3.3 — March 12, 2013
- Bug Fix: Fixes determining the power source changed.
- Version 1.3.2 — January 18, 2013
- Bug Fix: Fixed crash during the self-destruct window and fixed the enter key when entering the password.
- Version 1.3.1 — December 28, 2012
- Bug Fix: Fixed issues displaying on Retina Macs.
- Version 1.3 — December 4, 2012
- Bug Fix: Fixed issues displaying on Retina Macs.
- Version 1.2.9 — October 23, 2012
- Modification: Signed properly on Mountain Lion.
- Version 1.2.8 — October 9, 2012
- Bug Fix: Fixed the option to hide the menubar on startup.
- Version 1.2.7 — February 10, 2012
- Modification: Updated to the latest set of Koingo Software core classes for overall stability improvements.
- Release notes truncated to 2012 only.
Older versions for legacy users