What can you actually automate with an NFC tag?
Nothing on its own. A tag holds a few bytes and does nothing until a phone reads it, so what you can automate is whatever your phone could already do. The tag replaces the tapping and the remembering, which is a smaller claim and a real one.
A tag is a trigger, not a brain
A tag holds a small amount of content and no logic. It cannot decide, wait, check a condition or act on its own.
Everything that happens after a tap happens on the phone, using capabilities the phone already had. The tag chose the moment, and nothing else.
So the honest framing of any automation project is not what the tag can do. It is what your phone can already be told to do, and whether a tap is a better way of telling it.
What that is genuinely good for
Replacing a sequence of taps with one gesture, where the sequence is one you perform often and in the same place.
Attaching an action to a location, since a tag is fixed and a phone is not. A tag by a door means something a shortcut on a home screen does not.
Making something available to other people, such as a guest who does not have your shortcuts and will not install anything.
And removing the remembering, which is the underrated one. A tap at a place you already go beats an intention you have to hold.
The platform question comes first
Several of the most popular automations behave differently on the two platforms, and a few work on only one.
Wi-Fi credentials are the clearest case: written to a tag they configure a network on Android and are not acted on the same way by an iPhone.
So establish which phones will tap before designing anything. An automation that works for you and not for your guests has solved a different problem from the one you had.
Whether it is worth the effort
Most automations are built once, used for a fortnight, and then quietly abandoned. That is not a failure of the technology.
The ones that survive share a shape: they save a real number of steps, at a place you pass anyway, for something you do often enough to have noticed the friction.
The ones that do not are usually clever rather than useful, and they are the ones people build first.
Build the boring one first and see whether you still use it in a month. That single test saves more time than any guide.
All guides in this section
- Wi-Fi and network
- Contact and identity
- Home automation
- Phone routines
- Car and desk
- Media and entertainment
Wi-Fi and network
- How do you set up guest Wi-Fi sharing at home?
- Where should a guest Wi-Fi tag be placed?
- Is a Wi-Fi tag a security risk?
- How do you update a Wi-Fi tag after a password change?
- How do you make a Wi-Fi tag for a holiday rental?
- Can one tag hold two networks?
- Can a Wi-Fi tag work with enterprise networks?
- Can a tag connect to a hidden network?
Contact and identity
- Is an NFC tag a good way to share your contact details?
- How do you share a social profile by tap?
- How do you share a payment link by tap?
- Can a tag hold several ways to reach you?
- How do you change what your tag shares later?
- What personal data should never go on a tag?
- How do you make an emergency information tag?
- Can a tag identify a pet or a piece of luggage?
Home automation
- What can an NFC tag control at home?
- How do you link a tag to a smart home system?
- How do you make a tag turn the lights on?
- Can a tag trigger a whole scene?
- How do you make a bedtime tag?
- Where do you place tags so they get used daily?
- Does a home automation tag need the internet?
- Can several people share the same home tag?
- Can a tag arm and disarm an alarm?
- What happens to your tags if you change platform?
Phone routines
- How do you make a tag change phone settings?
- How do you build a tag driven routine on Android?
- How do you build a tag driven shortcut on iPhone?
- Can a tag turn on do not disturb?
- Can a tag start a timer or a countdown?
- Can a tag log something automatically?
- How do you make a tag send a message?
- Can a tag toggle between two states?
- How do you chain several actions to one tap?
- Which routines are actually worth automating?
- How do you test a routine before relying on it?
- Why does my routine tag not work for a guest?
- Why do routines stop working after an update?
- What survives when you change phone?
Car and desk
- What is a car mode tag, and does it help?
- Can a tag start navigation to a saved place?
- When should you not use a tag in a car?
- Can an NFC tag unlock or start your car?
- Can a tag work in a car several people drive?
- Can a tag start a video call?
- Can a tag tell others you are in a meeting?
- Can a tag open a shared board or document?
- Can a tag clock you in and out?
Media and entertainment
- Can a tag start music on a speaker?
- How do you make a tag for a playlist?
- Can a tag point to a video you filmed?
- How do you build a tag driven board game aid?
- Can tags be used in an escape game?
- How do you make a tag treasure hunt?
- Can a tag launch a podcast episode?
- What makes a good tag based gift?
- Can tags replace a physical album for children?
Frequently asked questions
Can a tag do something without a phone?
No. A tag has no power and no logic, so nothing happens until a phone reads it and acts.
Do automations work the same on iPhone and Android?
Several do not. Wi-Fi credentials in particular configure a network on Android and are not acted on the same way by an iPhone.
Do I need an app?
For anything beyond opening a web address, usually yes on both platforms. That matters most when other people will tap the tag.
Which automation should I build first?
The boring one you would use daily. Clever automations are built first and abandoned first.