You can ask an AI chatbot to fix your resume, explain a medical test result, draft a hard email to your landlord or debug code from work. It is so helpful, and so conversational, that it is easy to forget you are typing into an online service.
That does not mean chatbots are dangerous. It means the same common sense you apply to email or cloud storage applies here too. This guide explains what actually happens to what you type, what to keep out, and how to get the same help without oversharing.
What Happens to What You Type
Details differ between providers and change over time, but most consumer AI chatbots work roughly the same way:
- Your chats are stored on the provider's servers. That is how your history syncs between devices. It also means your conversations exist somewhere other than your phone
- They may be reviewed by people. Providers often have staff or contractors review a sample of conversations to check quality and catch misuse. Reviewed chats are usually separated from your account name, but the content is read by a human
- They may be used for training. Several consumer chatbots can use conversations to improve future models, either by default or after asking you. Most let you switch this off
- They are kept for a while after you delete them. Deleting a chat usually removes it from your view immediately and from the provider's systems after a retention period, commonly around 30 days. Some data can be kept longer for legal or safety reasons
- Business plans work differently. Enterprise, team and API plans usually do not train on customer data by default and offer stricter retention. That is why many employers allow only the company account
None of this is hidden. It is in each provider's privacy policy and data controls. Most people just never read them.
The Real Risks (and the Overblown Ones)
The chatbot "remembering" you and telling someone else is not how it works. A model does not look up another user's chat and repeat it. The risk from training is subtler: models can occasionally reproduce unusual text they saw many times during training, which is one reason providers filter personal data out of training sets. For a single chat you had once, the chance of it resurfacing word for word is very low.
The realistic risks are more ordinary:
- Account access. Anyone who gets into your account, or picks up your unlocked phone, can read your whole history. Use a strong password and two-factor authentication
- Bugs and breaches. In 2023 a bug in ChatGPT briefly showed some users the titles of other people's conversations. Any online service can have incidents like this
- Sharing links. Several chatbots let you share a conversation as a public link. In 2025 some shared ChatGPT conversations that users had marked as discoverable showed up in Google search results, and the feature was removed. Anything you share publicly should be treated as public
- Workplace leaks. In 2023 Samsung restricted staff use of generative AI after engineers pasted confidential source code into ChatGPT. The problem was not hacking. It was company data leaving the company
- Wrong answers you act on. Not strictly privacy, but worth saying: chatbots can sound confident and be wrong, especially on medical, legal and financial questions. See our guide to why AI makes things up
Never Paste These Into Any AI Chatbot
- Passwords, PINs and one-time codes. No legitimate task needs them. A message asking you to paste a code into a chat is a scam
- Full card numbers, bank account numbers and online banking details
- Government ID numbers, such as a social security number, passport number or national ID
- Medical records or test results with your full name, date of birth and ID numbers attached. Asking what a cholesterol number means is fine. Uploading the entire hospital report with every identifier is not necessary
- Other people's private information, like a friend's health issue with their name, a client's address, or screenshots of private group chats
- Confidential work material your employer has not approved for AI tools: unreleased plans, client data, contracts, internal source code
- Anything you would be harmed by if it became public, if you are using the free consumer version with training switched on
How to Get the Same Help Without Oversharing
Almost every task works just as well with the identifying details removed. A few habits:
- Swap names for roles. "My manager" instead of a full name, "Client A" instead of the company
- Remove numbers that identify you. Replace account numbers, addresses and ID numbers with placeholders like [ACCOUNT] before pasting a document
- Ask about the pattern, not your file. "What does a high ALT result usually mean?" instead of uploading the full lab report
- Summarize instead of pasting. Describe the shape of a contract clause rather than pasting the whole signed contract
- Use the right account for work. If your employer provides an approved AI tool, use that for work data, not your personal app
You lose almost nothing in answer quality, and you keep control of the details that matter. For more ways to get good results from AI tools, see how to use AI for productivity.
Settings Worth Changing Today
Open the settings in whichever AI apps you use and look for:
- Training or "improve the model" toggles. Switch off if you do not want your chats used for training
- Chat history and memory. Some assistants remember facts about you across conversations. Review what is saved and delete anything you would rather they did not keep
- Temporary or incognito chats. Many apps offer a mode that is not saved to your history. Use it for one-off sensitive questions
- Shared links. Check for any public links you created and delete the ones you no longer need
- Two-factor authentication on the account itself
What About AI Apps on Your iPhone?
Many AI apps on the App Store are built on top of models from larger providers. That means your prompt can pass through two parties: the app developer and the model provider. Before you rely on any AI app for something personal, check its privacy policy for who processes your prompts, how long they are stored, and whether they are used for training. Apple's App Store privacy labels give a quick first summary on the listing page.
Generai is our AI chat and art app for iPhone, for writing, brainstorming, questions and image creation. Everything in this guide applies to it as well: it is a useful assistant, not a vault, so keep passwords, financial details and other people's private information out of your prompts. Our Generai privacy policy explains how prompts are handled. If you are comparing assistants more broadly, our roundup of the best AI chatbot apps for iPhone covers the main options.
The Short Version
- Treat an AI chatbot like any online service: what you type is stored, may be reviewed and may be used for training
- The realistic risks are account access, bugs, public share links and work data leaving the company
- Never paste passwords, codes, financial numbers, ID numbers or other people's private details
- Remove names and numbers before asking for help. The answers are just as good
- Check the training, memory and history settings in every AI app you use