Messenger : All-in-one enables you to reach popular messenger apps with a one, light-weight shortcut application ! Download now and delete your shortcuts

Messenger: All-in-one app also has Apple Watch version for you to control messenger apps with your smartwatch !

Also, you can see statistics of your messenger usage, which one you are using at most?

This app makes life easier for you, that is a 3rd party app which is not owned by any of these messenger platforms!

Messenger & Call : All-in-one application has an Unlimited Accessible version with the subscription option:
This is an auto-renewable subscription. Subscription periods is weekly. Payment is charged to App Store account at confirmation. Subscription is renewed unless turned off 24hour before the period ends. In this case, the account will be charged for renewal as well. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication where applicable.

Terms & Conditions: https://bit.ly/2QfVBMk