How to schedule a text on iPhone Follow
Here's how to schedule a text on an iPhone if you’ve got a message you need to plan to send.
The Messages app does not include a built-in scheduling feature but there is an easy workaround with the Shortcuts app, which comes pre-installed on all iPhones.
Open Shortcuts and tap Automation > Create Personal Automation. Then select the time of day when you would like to send the message and tap Next. Select Send Message and then enter the recipient to whom you are texting and the message you need to send. Tap Done and that’s it. All scheduled.
Another option is to draft a text in the Notes app so that it’s all typed, proof-read, and ready to send when you need it. If you need a reminder, you can schedule an alarm in the Clock app.