Why this is useful
When your iPhone is often on silent, every alert feels the same: it vibrates, you check the screen, and only then do you know whether it mattered. Custom vibration patterns change that. You can recognize important people by the rhythm and decide whether to respond immediately or leave the phone alone.
This is useful for family, childcare, work, on-call duties, or any contact where missing a call would actually matter. Instead of turning on more sounds, you use the haptics your iPhone already provides.
How to set it up
Open the Contacts app and choose the person who should get a custom pattern. Tap Edit, then open either Ringtone for calls or Text Tone for messages. Choose Haptics, then tap Create New Vibration.
Now tap the pattern directly on the screen. Short taps create short pulses, and longer presses create longer vibrations. Save the pattern with a clear name, such as "Family short-short-long" or "Urgent long-long". After that, the pattern applies only to that contact and only to the alert type you changed.
Make the pattern recognizable
Keep the rhythm simple. Two short pulses followed by one long pulse is much easier to recognize than a complicated sequence with many pauses. For truly important contacts, choose a pattern that feels clearly different from the default vibration.
Do not create a unique rhythm for everyone. If ten people have ten different patterns, you will stop recognizing them. A better setup is two to four clear groups: family, work, urgent, and maybe one person who always gets priority.
Quick quality check
Test the pattern after saving it. Put the iPhone on a table or in your pocket, because vibrations feel different there than they do in your hand. If you cannot recognize the rhythm immediately, make it simpler or more distinct.
Also check calls and messages separately. Ringtone affects calls, while Text Tone affects messages. If you only change one of them, the custom vibration only works there. That can be exactly what you want, but it should be intentional.