How to Use a ChatGPT-Style AI Without an App
Updated: 1 day ago
Every major AI assistant ships as an app. Download it, create an account, sign in, allow notifications, update it next month. That works if you have a recent smartphone, storage to spare and a data plan you are not worried about.
It leaves out everyone who does not. We wanted to know how many people that is, so we went to the numbers.
The gap between "can text" and "can run the app"
Pew Research Center's 2025 mobile fact sheet reports two figures for US adults, from a survey of 5,022 people run from February 5 to June 18, 2025: the share who own a cellphone of any kind, and the share who own a smartphone. The difference between those two is the share who can send and receive texts but cannot install an app.
Our method is simple subtraction, done for every group Pew breaks out. Pew does not publish this gap itself. It is a floor, not a ceiling, because it only counts people with no smartphone at all. It does not count people whose smartphone is too old for the current app, or who have one but no data plan.
All US adults: 98% own a cellphone, 91% own a smartphone. Gap: 7 points.
Ages 18 to 29: 99% and 97%. Gap: 2 points.
Ages 30 to 49: 99% and 96%. Gap: 3 points.
Ages 50 to 64: 98% and 90%. Gap: 8 points.
Ages 65 and over: 95% and 78%. Gap: 17 points.
Household income under $30,000: 95% and 82%. Gap: 13 points.
Income $30,000 to $69,999: 98% and 89%. Gap: 9 points.
Income $70,000 to $99,999: 99% and 96%. Gap: 3 points.
Income $100,000 and up: 99% and 97%. Gap: 2 points.
Rural: 97% and 87%. Gap: 10 points.
Urban and suburban: 6 points each.
The pattern is clear. The people an app leaves out are older, lower income and rural, and the gap for the oldest group is more than eight times the gap for the youngest.
Put a population on the biggest one. The Census Bureau's Vintage 2024 estimates count 61.2 million Americans aged 65 and over. Seventeen percent of that is about 10.4 million older adults who carry a phone that can text but cannot install a chatbot.
The app itself is the second barrier
Even people with a smartphone have to get the app onto it. The ChatGPT listing on the App Store shows a download size of 271.7 MB and requires iOS 18.0 or later.
Compare that with a text message. One SMS carries up to 160 characters, packed into 140 bytes. Divide 271.7 million bytes by 140 and the app download weighs the same as about 1.9 million text messages. If you asked an AI one question a day by text, it would take more than 5,000 years to move as much data as the install.
That matters for people who count their data. Pew's 2025 broadband data finds 16% of US adults are smartphone-dependent, meaning they have a smartphone but no home broadband. Among households earning under $30,000 it is 34%. For them, every megabyte comes out of a mobile plan.
What an AI by text looks like
Assistant Textapp is an AI you text. You send a question to a phone number and get one short answer back, usually a single paragraph. There is nothing to install and no account to make. The exchanges look like this:
You: whats a reasonable tip on an $84 dinner
Assistant: 18 to 20%, so $15 to $17. Rounding the total to $100 is the easy move.
You: how do I politely tell my landlord the heat still isn't fixed
Assistant: Keep it short and dated: "Hi, following up on the heat. It still isn't working as of today. Can you let me know when someone can come by?" Written notice helps if it drags on.
You: tell me more
Assistant: (a longer version of the last answer, up to about four text messages worth)
That last one is the trick that makes short answers work. The first reply is brief on purpose, since texts are small and most questions do not need an essay. If you want detail, you ask for more and get it.
What you keep, and what you give up
You keep the useful parts of a chatbot. It remembers context, so if you mention your city or what you are working on, you do not have to repeat yourself in the next question. You can send a photo of a menu, a label, a form or an error screen and it reads it for you.
You give up the things that need a screen. There is no voice mode and no document upload. Answers are short unless you ask for more. For medical, legal or money questions it gives general information and tells you to check with a professional. It cannot act in the world: it will not book, pay, call or send anything on your behalf, and it says so.
For a lot of questions, that trade is a good one. Pew's 2025 ChatGPT survey found that 34% of US adults have ever used ChatGPT, and 20% have heard nothing about it at all. The number you text does not need you to have heard of anything. It needs you to be able to text.
Try it by text
Text Hi to (518) 302-2982 to start Assistant Textapp. It works on any phone that can send a text message, with no app and no account. Your first 20 messages are free. After that, one $9.99 a month subscription covers every Textapp.
Details and the full list of commands are at textapp.co/apps/assistant.
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