Easy to use - Too easy that it won't involve any codes, html, SQL or even copy-and-paste!
   
 
Make a prelaunch page - Before the product launches, you might want to ask visitors to subscriber to be one of the early birds!
   
 Launch sales on specific date! - Now you can launch a sales on a date your have specified and it will change the page automatically on that date!
   
 
End sale on specific date - No more lying to your visitors, telling them it will end tomorrow and tomorrow never ends!
   
 Sales booster - If you have great offer that is DAMN new and hot, with the right strategy, you can prelaunch with a special price and launch it with the normal price!
   
 Flexible - Not only that you can use to automatically launch or end or launch and end your sales, but you can also use it to make your offer HOT!
   
 Can be integrated - Guess what? You can even integrate with other scripts like rollercoaster, dimesales, discount, etc! Example: during the prelaunch you run the rollercoaster script, when it launches, the offer will be at its normal price!
   

But what would happen if you dont use Auto-Launch-End maker? 
You have to keep replacing pages every time you know your offer has expire 
It might even disturb your sleep because you have to change the page on the specific time as promise
You might even forget to change the page on the specific time and date! 
During one of the replacements, you encounter some problems and thus, your new page/offer has to delay. You might lose a lot of customer if your page shows that there is no such page.
Or if you are more unfortunate, you misplace your new page or forget what its name is, then you will have to redo the new page!

Very tedious isnt it? If I were you, I would be very demoralized and just give up.

With Auto-Launch-End maker, you can forget that tiring tasks. This is because it will automatically change the page for you! Just upload and you can leave the rest of the work to the Auto-Launch-End output file.

More detailed info here