Like many I am not a huge fan of telemarketing. I know there exist applications that automatically reject call from telemarketers based on some blacklists. This is quite convenient but it doesn't go far enough for my taste.

I am looking for Android and iPhone applications to make them waste as much time as possible. The application would - instead of simply rejecting the telemarketer's call - pick up the phone and imitate a human voice, with the goal of confusing or making the telemarketer wait.

For example, the application could:

  • say "Please hold the line, I'll be right back / in two minutes"
  • repeat "Sorry I cannot hear you" with some long pauses between.
  • etc.

Anything creative to make the telemarketer stay longer on the line is good.

Free is better, but I am willing to pay for it. It's ok if the phone needs to be rooted/jailbroken.

  • 4
    Just connect them to an instance of Eliza. Commented Aug 17, 2014 at 22:47
  • "Excuse me, there's someone at the door" set your phone down beside a radio. Commented Mar 14, 2015 at 3:18
  • 10
    IMO this is a tad evil. Telemarketers are people too and need to make as many calls as possible a day to bring home the butter. Simply politely stating you don't want to be called back and/or blocking the number should be sufficient.
    – Huey
    Commented Apr 14, 2015 at 13:14
  • 7
    @Huey: Leeches also need to make a living, and they can only do it by sucking your blood, otherwise they starve to death. Unlike telemarketers, who presumably have free will, for leeches it isn't even a choice. I assume if you want to be nice to telemarketers, you also want to be nice to leeches? (Remember, even leeches have mothers).
    – Ira Baxter
    Commented Apr 24, 2015 at 3:50
  • 1
    Nomorobo is a free black-listing service. It's reduced, but far from eliminated, robocalls. Don't expect telemarketers to be fooled for long, by Eliza... they hang up quickly if they're not making progress. Commented Apr 27, 2015 at 2:38

1 Answer 1


Hellooo, this is Lenny!

Unfortunately, the original site (www.itslenny.com) is down, but you can find lots of videos, and imitators, on Youtube and elsewhere.

A brief Google search turned up this repo: https://github.com/lgaetz/freepbx-Its_Lenny

This seems like exactly what you want, though perhaps not the most user friendly.


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