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Simon monitors websites and alerts you of crashes and changes.

Select pages to monitor, choose your alert options, and customize your settings. Simon does the rest.

Keep a watchful eye on your favorite sites
  • Monitor any site. Want to receive an alert when a favorite blog has been updated? Or monitor activity on your personal page? If it's on the Web, Simon can watch it for you.
  • Enjoy flexible alert options. Find out about page changes via alarms, emails, or speech. Whether you're at work or at home, Simon has an alert option to match your level of

What's New

Version 4.2:
Added an Exclude Block filter
  • Added a new Exclude Block filter that outputs the text outside the block, instead of inside like the normal Block filter.
  • Enhanced the Block filter feature to support specifying whether to output the text before the Start, the Start text itself, the text between the Start and End, the End text, and/or after the End text, or any


  • OS X 10.10 or later

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Simon User Discussion

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3.9 28
Notify Now.) Added support for STARTTLS connection security and Password (PLAIN) authentication in the Email Transport panel. If the Port field is clear, or contains a standard port number for a connection security, it is changed to the typical port number when the connection security is changed. Preview improvements When the Preview page is displayed for a service, filter or notifier that supports previews (i.e. email and scripts), it displays a message "Reload to Preview", rather than automatically sending an email or running the script (resulting in unexpected placeholder emails or script actions). Click the Reload toolbar button, or the File > Notify Now menu command, to actually preview the item. Added special case support for Web content encodings specified in the source instead of the header (e.g., meta charset="gb2312" or meta http-equiv="Content-Type" content="text/html; charset=gb2312" for Chinese). Several fixes of the reports feature Fixed an issue with uploading reports to remote FTP servers. Fixed a crasher when adding a new report with the Preview pane selected. Fixed a logic error that prevented recent checks, changes, etc from being listed on the detail pages. Fixed incorrect last report date display when the report hasn't been generated yet. More convenient upgrade licensing When adding an upgrade license, now automatically looks up the original license, instead of just telling you it's needed (which can cause confusion, since it's an unusual situation). Lots more security and stability improvements Updated the Sparkle updater framework to the latest version. Added a Via SSL option to the Updates preferences, to use a secure connection to check for and download app updates. This is on by default, but can be turned off if it doesn't work for some reason. Also updated license refresh etc URLs to use TLS/SSL. Scripts are now saved as Base64-encoded text, to preserve formatting. Fixed a common crasher when editing at the Auto Pause pages. Fixed another crasher when changing pages at the bottom of the window. Fixed a cosmetic issue where the editor info background could show garbage in some situations. Fixed a couple of rare crashes with deleting items. Fixed a crash with using the Convert Domain/IP command with a large text field. Fixed a rare crash with reports. Fixed a rare crasher with the Find filter. " />


Current Version (4.x)


Downloads 34,854
Version Downloads 2,208
License Shareware
Date 23 Feb 2016
Platform Intel 64 / OS X
Price $99.00
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