Number Shield 4+

Stop caller ID spoofers

Kinnaman Software LLC

    • $2.99

iPhone Screenshots


Block annoying scammers who hide behind fake phone numbers.

Do you get unwanted calls or text messages from phone numbers similar to your own? With Number Shield, block an entire group of numbers at once. Just enter a wildcard for each digit you want to block.

For example, if your number is 714-555-1234, scammers might use a number like 714-555-6789. Block all similar numbers by entering 714-555-####. Wildcards and numbers can be combined in any order you choose. Block international numbers, too!

Use the "Allow Contacts" option to make sure you don't miss calls from your family and friends.

Block numbers directly from your phone's missed calls screen. Just follow these steps:

1. Tap the “ i ” button next to the missed call.
2. Tap “Share Contact”.
3. Tap “Block Similar Numbers”. (If you don't see this action, tap “Edit Actions...“ to enable it.)
4. Now you'll see the Number Shield number entry screen. Tap “Done” to block calls from similar numbers.

Please note:

• Each number pattern can contain up to 7 wildcards, and up to 50,000,000 phone numbers can be blocked.
• Blocked calls are sent directly to voice mail.
• Blocked text messages are sent to the “Junk” filter in the Messages app.
• iMessage messages are not blocked.
• When “Do Not Disturb” is enabled on your phone, calls that should be blocked may appear in your phone's list of missed calls.

More information about caller ID spoofing in the United States is available from the FCC:

What’s New

Version 3.1.1

Fixed a problem that prevented number patterns from being formatted correctly.

Ratings and Reviews

4.5 out of 5
1.3K Ratings

1.3K Ratings

Alan8692 ,

Mostly Good, Somethings Not Good

Starting with the good: Blocks numbers of my choosing rather than a community database. Blocks up to 5 entire area codes (goodby DC). Blocks neighborhood spam numbers. And my favorite- Adds allowed numbers by wildcard (adds all numbers from a PBX, like my healthcare provider). Have not seen that anywhere else. And more - simple clean interface, no ads, no nagging to upgrade, etc.

The not so good: Very slow updating when the list is large. Just adding or removing a single number takes too much time. I get the feeling that updates are done by “starting over”.

DLW15 ,

Great App

This is still one of the best cures for robocalls. I’m surprised it doesn’t get mentioned more in the press. My original review is shown below.

This app is just what I was looking for. There are several highly rated subscription apps that handle robocalls and known scammers. However, I don’t get so many calls that I mind manually blocking these calls. What drives me nuts, however, are the calls from a range of numbers that are probably coming from the same entity. This app is perfect for this situation. I have been trying to keep the ranges down to a few thousand numbers because I think the developer said that Apple will only allow one million blocked numbers. No problem—this should do the trick. Did notice one glitch when setting up my iPhone X. The second number entered will keep the app loading. To fix this I just force quit the app, and all subsequent numbers entered fine.

Developer Response ,

Thanks for the great review.

Julio Reguero ,

The app works if you configure it properly.

The app works as advertised by the developer, but you have to first configure couple things in your iPhone Settings to make it work. Inside the Messages setting go to “Unknown & Spam” and turn on the toggle ‘Filter Unknown Senders’. Then tap on the Number Shield in order to select this app to filter your messages, otherwise the app won’t be able to block matching number patterns. Make sure to tap on “Enable” when Apple ask you to confirm your selection in a popup. That’s it. Good bye notifications from spam texts! You will find the spam messages inside the Junk folder, and from there you can block and report the numbers as Junk to Apple and your phone carrier.

App Privacy

The developer, Kinnaman Software LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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