Is there a Free App for Taking Timed Snapshots in Windows?

I’ve got an app that I need to document runtime on.
It’s a Windows app, and it has to be manually operated to begin a lookup sequence.
I’d like to know how long this is taking, but I don’t want to sit around for 10-45 minutes staring at the Windows Clock.
I want a tool to take a snapshot every 30 seconds, so I can just run the app with the Windows Clock on the screen, and scroll through the snapshots to figure out when my app finished its run.

I can’t find an app that is:
Free
and
Will Do Automatic Timed Snapshots

Is there such an app?

I recall reading about some software that parents can use to check on what the kids are doing, by taking screen snapshots exactly as you describe. No idea what the names or companies are, but try that category.

A program called ScreenHunter seems to have a feature like you want:

http://www.wisdom-soft.com/sh/sh_step.htm#auto-capture

It looks like ScreenHunter first has the timed capture in version 5 Plus at $19.95, not in the free one.

http://www.wisdom-soft.com/sh/index.htm

There’s a shareware/free screen-cap at http://www.etrusoft.com/. I have no idea if it’s good, but it showed up early on a Google search.

You could record a macro with AutoHotkey.

IrfanView can do it.

Thanks for the suggestions.
I also found “Timesnapper” last night.
It’s very, very nice, but I’ll check out your other suggestions.

Really?
I’ve got that on my work PC and never even realized IrfanView could do that. Must be hidden in the UI.

Yep, Options/Capture Screenshot…/Capture Method/Automatic - timer delay . ISTR it’s a bit weird because it’s not obvious how to stop the auto-capturing - in fact you have to go back to the menu option.