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DoubleCheck iPhone App

A unique idea put in practice

This unique application allows users to discover the mobile operator of each contact in their address book, store the information for every contact and provide a seamless on-screen integration of the valuable info while placing or receiving a call, forever!

Do you have free calls or free text messages towards numbers that belong to the same mobile operator with you? Are you sure the persons you talk or text really belong to the same operator? DoubleCheck! Save money and impress your friends by having this useful information about them in your address book!The introduction of Mobile Number Portability allows anyone to change operator by keeping the same mobile number. Due to this fact, just looking at the phone number of your contacts is not enough to know which mobile operator they belong to.


Using DoubleCheck’s easy and friendly interface, you identify the current mobile operator of your contacts and mark it in your address book. With just a glance on your iPhone screen, this information is available everytime you place a call. DoubleCheck will also help you cleanup your address book from numbers that are no longer valid. Start using DoubleCheck today. Have fun finding out if your friends have switched mobile operators or if their number is still valid. Reduce your costs by knowing if the person you are contacting belongs to your free time/text plan.

DoubleCheck features:
  • Identify the mobile operator of a contact in your address book. DoubleCheck your entire address book or part of it, at once !
  • Mark the retrieved information in your address book with just a touch !
  • The mobile operator is always available when you make a call or text your contacts
  • Identify the mobile operator of a mobile number not in your address book.
  • Add the unknown number and the retrieved information to an existing contact or create a new one contact in your address book
  • All operators in 202 countries are supported (check the list below)
  • Identify invalid numbers in your address book. Easily re-check or edit/delete the contact from inside the app.
What' s New in Version 3:
  • Get FREE checks from your facebook friends !
  • New design and logo.
  • Ability to sort checks by date/name.

DoubleCheck comes with 10 free checks.

Almost anyone in the world can benefit from DoubleCheck since it covers all mobile operators in 202 countries:

Afghanistan, Albania, Algeria, Andorra, Angola, Anguilla, Antigua and Barbuda, Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Cayman Islands, Chad, Chile, China, Colombia, Comoros, Congo DR of the, Congo Republic of the, Cook Islands, Costa Rica, Croatia, Cuba, Cyprus, Czech Republic, Denmark, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia, Faroe Islands, Fiji, Finland, France, French Guiana, French Polynesia, French West Indies, Gabonese Republic, Gambia, Georgia, Germany, Ghana, Gibraltar, Greece, Greenland, Grenada, Guam, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hong Kong, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Ivory Coast, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Korea, South, Kuwait, Kyrgyzstan, Laos, Latvia, Lebanon, Lesotho, Liberia, Libyan Arab Jamahiriya, Liechtenstein, Lithuania, Luxembourg, Macau, Macedonia, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Mauritania, Mauritius, Mayotte and Reunion, Mexico, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Namibia, Nepal, Netherlands, Netherlands Antilles, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Norway, Oman, Pakistan, Palestine, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Poland, Portugal, Puerto Rico, Qatar, Romania, Russian Federation, Rwanda, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, South Africa, Spain, Sri Lanka, Sudan, Suriname, Swaziland, Sweden, Switzerland, Syria, Taiwan, Tajikistan, Tanzania, Thailand, Togo, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Uganda, Ukraine, United Arab Emirates, United Kingdom, United States of America, Uruguay, Uzbekistan, Vanuatu, Venezuela, Viet Nam, Virgin Islands, Yemen, Zambia, Zimbabwe