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Whistle Phone

  • Category: Social Networking
  • Released date: 09/18/2009
  • Current Version: 1.23
  • Seller: Vail Systems, Inc.
  • Recommended Age: 4+
  • Download Size: 2357059
  • Last Update: 07/22/2011
  • Requirements: All

iPhone Screenshots

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iPad Screenshots

*** As featured on Good Morning America and This Week in Tech. ***

Whistle brings free contiguous US calling to your iPhone or iPad over WiFi or 3G. Whistle works out of the box with the 4th Gen iPod Touch. For previous generations, you'll need headphones and a microphone.

Whistle provides free ad-supported 20 minute inbound and outbound calls to and from your Whistle number. Whistle notifies you of calls through Push notifications.

You can also make unlimited length, ad-free calls to continental US phone numbers for a low, per-minute rate.

FOR A LIMITED TIME, we're giving everyone the opportunity to use as many pushes as they want. After this initial offer, push with limits will be free and unlimited push will be available on a subscription basis.

Whistle also provides international calling at low rates.


✓ Has built-in integration with your iPhone, iPod Touch or iPad Contacts

✓ Includes two-line calling features, including call waiting and three way calling

✓ Forwards your Whistle calls to any phone number via our Follow Me service for a low per-minute rate

✓ Allows Whistle calls to continue in the background on speakerphone (iPhones with iOS4 only)

✓ Integrates with Apple Headphones: click the center button on your Apple headphones to answer an incoming call or disconnect a call in progress or double click the center button to switch between calls on different lines (requires iOS 4)

✓ Use Whistle as a client with any 3rd party SIP service

✓ Utilizes Apple's Bonjour technology to automatically discover and call Whistle users on your WiFi network

Please direct comments on bug fixes or feature requests to either [email protected] or to our support site at We do really want to hear from you and we've set up these forums to address your thoughts directly.

* Check out Whistle Phone for the Mac, now on the Mac App Store *

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