You can use your messenger app with other iPhone or iPad.

Information About Subscription
You can cancel your subscription or free trial anytime by cancelling your subscription through your iTunes account settings, or it will automatically renew. This must be done 24 hours before the end of the free trial or any subscription period to avoid being charged. Subscription with a free trial period will automatically renew to a paid subscription. Please note: any unused portion of a free trial period (if offered) will be forfeited when you purchase a premium subscription during the free trial period.Subscription payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term. For more information, please see our Privacy Policy and Terms of Use.

Privacy Policy: https://sites.google.com/view/dual-messenger-privacy

Terms of Use: https://sites.google.com/view/dual-messenger-terms