Does my purchased TXT App Now number expire, or is it valid indefinitely?

TXT App Now Number Validity:

Your TXT App Now virtual phone number remains valid indefinitely as long as your subscription is active and not interrupted. 

Here's how to check your subscription status and upcoming renewal date:

1. Open your device's Settings app.

2. Tap on your Apple ID.(This might be labeled differently depending on your iOS version)

3. Select "Subscriptions".

4. Find and tap on "TXT App Now" in your list of subscriptions.

5. Review the details on this screen. It should display your subscription status (active, upcoming renewal date, etc.).

By keeping your subscription active, your TXT App Now number will remain yours to use.