Can someone recommend a free mobile app that can make free calls/text in the USA for iOS users?

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Can someone recommend a FREE mobile app that can make free calls/text in the USA for iOS users? I tried the following apps na since it was recommended by others but they are either limited to Android or no longer in the appstore. Thank you in advance for the suggestions.

2ndline is only available at Playstore. Textnow is no longer in the Appstore.