Which tool to choose
It's not the same thing with different names: they're two philosophies. The built-in AI is born to be within reach of a gesture and to talk to the rest of the phone; the external app is born to be your thinking assistant, the same one on every device.
- You need speed and access to your apps (replying to a message while you walk, summarizing a notification, asking something on the fly): the built-in AI. It's already there, starts with a gesture, sees the phone's context.
- You need depth and continuity (writing a long text, reasoning through a problem, picking up a conversation started on the PC): the external app. It keeps the thread, is more capable on complex tasks, follows you between phone and computer.
- You care about privacy on a specific task: look at where the AI runs. The built-in one runs part of the computation on the device for simple tasks; external apps send almost everything to the servers. For a private note, local processing is a real advantage.
How to do it (choosing without getting it wrong)
- Define the task in one sentence. "I want to convert a measurement" is different from "I want to write a complaint letter".
- Ask yourself where the material lives. If it's inside the phone (a photo, a message, a notification), start with the built-in AI that reaches it without copy-paste. If it's an idea in your head or a document you bring yourself, the external app is perfectly fine.
- Ask yourself whether the conversation will continue. Single back-and-forth, hands busy: built-in. A dialogue that develops or that you'll resume from the computer: external.
- Check: if you find yourself manually copying a lot of things from the phone into the external app, you're using the wrong tool for that task; switch to the built-in one. If the built-in one gives you short answers and you lose the thread of the discussion, switch to the external one.
The operational syntax to test both on the same task and decide:
I'll give you a real task I often face with my phone. Tell me whether it's better to do it with the system's built-in AI or with an external AI app, and why. The task is: [describe].
If you're not sure which built-in AI your phone has, don't get lost in the menus: open the assistant with the gesture you already know and ask it "what can you do and what can't you do": it answers with its real current capabilities.
A concrete example
Same day, two tasks. In the morning, in line at the post office, a confused message arrives from a client: you hold down the assistant button, the built-in AI reads the message in context and suggests a reply in three lines. In the evening, at home, you have to write the real proposal for that client: you open the external app on your phone, pick up the project you'd started on the computer, and in half an hour of conversation you build the document. Morning: built-in, because the material was in the phone and you were in a hurry. Evening: external, because it needed continuity and depth.
When it does NOT work (and how to fix it)
If the built-in AI gives answers that are too superficial
It's made for speed, not long reasoning. When you realize the task calls for more steps, don't insist: copy the question into the external app, which is tuned for depth. Recognizing when to switch tools is half the work.
If the external app doesn't see your messages or photos
Third-party apps live in a "separate room" and don't read the rest of the phone for security reasons. Fix: you bring the material in yourself (share the photo, paste the message), or you use the built-in one precisely because it needs that bridge less.
If two AIs on the same phone confuse you
You can end up not remembering which one you used for what. Fix: assign a gesture to each (side button for the built-in, home icon for the external) and give yourself a simple rule once and for all: quick gesture for phone things, icon for thinking.
A tip from someone who really uses it
Don't choose "one forever". The built-in phone one and the external app cost little or nothing to keep together, and each wins in half the situations. The mistake is forcing the external app to do the built-in one's quick work, or expecting the built-in one to have the external one's depth. Keep both, and let the task do the choosing.
Frequently asked questions
Do I have to pay for two subscriptions to have both?
No. The built-in AI is included with the phone and many external apps have a free version that's more than enough for everyday use. You pay only if you need the higher limits or the advanced features of one of the two, not for keeping them together.
Which of the two is safer for personal data?
It depends on the task. For what stays on the device, the built-in AI that processes locally exposes your data less. For what you send to the servers anyway, what counts are the privacy settings you choose yourself in both: turn off the use of your data for training where possible.
Will the built-in AI end up making external apps useless?
It's the easy prediction, but wrong today: the two things aim at different goals. The built-in one aims to be everywhere and fast, the external one to be deep and portable across devices. As long as you want the same assistant on the PC and the phone, the external app has a role the built-in one doesn't cover.