iPhone Screenshots


"I've been in law enforcement for 20 years and I have found a lot of apps that helped me do my job. However this one surpasses them all. Best law enforcement app yet." - NC Police Officer

"Top 15 Mobile & Tablet Police Apps" - CriminalJusticePursuit

10-21 (radio code for "make a phone call") is a Police App for making free* calls to citizens that GET ANSWERED. Calls are made from local (not blocked) numbers without revealing your personal number. Stop getting sent to voicemail!

For example, if you call a citizen in Miami area code (305), they will receive an incoming call from a local (305) number, regardless of where you are. They are more likely to answer that call on your first try.

If the citizen calls back, rather than bugging you off-duty, they will be prompted to "Press 1 to Request a Call Back" (via Push Notification) or "Press 0 to Reach a Dispatcher" (connects to a non-emergency number that you provide).

When citizens request a call back, you receive a Push Notification on your phone rather than a phone call. At your convenience, simply tap the notification to initiate a call back out to the citizen.

*Calls are made over a VoIP data connection and do not use your cellular minutes. While the data used is minimal, data usage fees from your provider may apply.

What’s New

Version 1.16.2

New password policy and bug fixes.

Ratings and Reviews

4.3 out of 5
72 Ratings

72 Ratings

Trooper_6 ,

Great app with great intention.

I did love the app. Worked great when I had data service, however had to stop using it. We are on a 2gb plan for 3 people in my family and unfortunately the app used enough data to get my wife’s attention. Yes I did use it for work related purposes, however I’m the one paying the cell phone bill. If the app used my normal cell service which is 1. Unlimited and 2. Normally still available in low data service areas....then I would still be using it today. Love the idea behind it, but can’t use it.

PD Sergeant TX ,

Almost perfect

This app is great for basic patrol needs and especially for new CI’s. I would rate the app 5 stars if I was able to receive push notifications more consistently. I find myself having to check the app frequently while working and expecting a call back. Probably a user error but I’ve gone through all the notification settings and can’t seem to make it work! Fix that and I will have zero complaints. I’d love to see a text option or chat feature incorporated in the future.

SkipedLegDay ,

Works well, I wish it did more.

This has been a great app to use at work.
However, I wish it allowed people to leave voicemails instead of just a notification of a callback.
Also, I want an option of NOT informing the caller that I’m a Police Officer.
Update these things and it’s well worth 5 stars.


Callyo 2009 Corp.
26.6 MB

Requires iOS 9.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2015 Callyo 2009 Corp.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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