The most useful things to ask an AI chatbot are everyday jobs involving words: rewrite a message, explain something confusing, plan meals or a trip, brainstorm options, or turn a messy list into a clear one. Trivia and trick questions are where chatbots disappoint. Real tasks with real details are where they save you time.
Below are 40 prompts sorted by category. Copy one, swap in your details, and follow up with “shorter”, “more casual” or “give me three options” until it’s right. Nearly all of them work with an AI model running offline on your phone, which matters for the ones that involve your health, money or relationships.
Everyday writing #
Chatbots are strongest here, and even small on-device models do these well.
- “Rewrite this text message so it sounds friendly, not annoyed: [paste].”
- “Write a two-line reply declining this invitation politely: [paste].”
- “Turn these notes into a clear email to my team: [paste bullet points].”
- “Give me five subject lines for an email asking my manager for a day off.”
- “Proofread this and list every change you made: [paste].”
- “Make this paragraph half as long without losing the key facts: [paste].”
- “Write a thank-you note to a neighbor who watched our dog for a week.”
- “Help me write a firm but polite message to a contractor who’s two weeks late.”
For messages where the tone really matters, our AI tone checker guide shows how to get honest feedback before you hit send.
Explain something confusing #
- “Explain what ’escrow’ means like I’ve never bought a house.”
- “What’s the difference between a Roth IRA and a traditional IRA? Use a table.”
- “My car shows a yellow engine light that looks like a submarine. What might it mean and how urgent is it?”
- “Explain this paragraph from my lease in plain English: [paste].”
- “What questions should I ask a plumber before hiring them?”
- “Explain how a heat pump works, then tell me the three things that affect its running cost.”
Chatbots are good explainers, but for anything with legal, medical or financial stakes, use the answer to understand the terms and then confirm with a professional.
Food and home #
- “I have chicken thighs, a lemon, rice and frozen peas. Give me three dinner ideas under 40 minutes.”
- “Plan five weeknight dinners for two, vegetarian, and give me one shopping list grouped by aisle.”
- “Scale this recipe from 4 servings to 6 and convert it to grams: [paste].”
- “What can I substitute for buttermilk?”
- “Make a cleaning schedule for a two-bedroom apartment that takes 20 minutes a day.”
- “Give me a packing list for a four-day beach trip with a toddler.”
If your chatbot can read photos, you can also point the camera at the inside of your fridge and ask what to cook with what it sees.
Work and study #
- “Summarize this article in five bullets and one sentence on why it matters: [paste].”
- “Quiz me with ten questions on the causes of World War I, one at a time, and tell me when I’m wrong.”
- “Turn these meeting notes into action items with owners: [paste].”
- “Rewrite my resume bullet so it shows the result, not just the task: [paste].”
- “Help me prepare for a job interview for a junior accountant role. Ask me one question at a time.”
- “Explain this error message and what I should try first: [paste].”
- “Write an Excel formula that adds column C only where column A says ‘paid’.”
Pasting work material into a cloud chatbot can break your employer’s rules. Our guide to using AI at work without leaking data explains what’s usually allowed.
Planning and decisions #
- “Help me compare these two job offers. Ask me what matters most to me first.”
- “I’m choosing between a used Honda Civic and a used Toyota Corolla. What should I check on each?”
- “Make a 12-week plan to run a 5K, starting from walking 20 minutes.”
- “I have $300 a month to save. List five ways to split it and the trade-offs of each.”
- “Build a three-day itinerary for Lisbon for someone who hates museums.”
- “What am I forgetting? I’m moving apartments next month and I’ve done X, Y and Z.”
A trick that works for all of these: end with “Ask me any questions you need before you answer.” The plan gets much more specific.
Personal and private #
These are the questions many people hesitate to type into a cloud chatbot, because the details are sensitive.
- “My partner and I keep arguing about chores. Help me plan a calm conversation.”
- “I got this letter from my insurance company. What is it asking me to do? [paste].”
- “Help me write a message to a friend I haven’t spoken to in years.”
- “I feel stuck in my job. Ask me questions to help me figure out why.”
- “Help me draft what to say at my father’s memorial service.”
With a cloud service, these conversations sit on the company’s servers under its privacy policy. With a model that runs on your phone, they don’t leave the device. Personal LLM works that way: you download an open model such as Qwen 3.5 or Gemma 4 once, and after that the chats are computed and stored on the phone, with no account and no server. It’s a sensible home for questions 34 to 38. For more on this, see talking to AI about personal problems privately.
Just for fun #
- “Let’s play 20 questions. You think of an animal and I’ll guess.”
- “Write a short bedtime story about a turtle who’s afraid of water, for a five-year-old.”
Chatbots make surprisingly good game partners. We collected the ones that work best, and the ones that don’t, in games to play with an AI chatbot.
What not to ask an AI chatbot #
Some questions reliably produce bad answers, especially from smaller models:
- “What happened today?” A model without web search knows nothing after its training cutoff and may invent something. Offline models never have search.
- “Give me sources for this.” Chatbots can make up citations that look real. Ask for the name of the organization or document, then find it yourself.
- Exact trivia about small topics. Population of a small town, a minor celebrity’s birthday, a specific court case. The less often something appears online, the more likely the model guesses.
- Long exact arithmetic. Use a calculator, or ask the model to show its steps so you can check them.
- “Am I sick?” It can explain symptoms and help you prepare questions for a doctor. It can’t examine you.
How to get better answers from any prompt #
The same four additions improve almost every prompt above:
| Add this | Example |
|---|---|
| Who it’s for | “for my 70-year-old dad who isn’t techy” |
| The format | “as a table”, “in three bullets”, “under 100 words” |
| Your constraints | “no oven”, “budget $50”, “must finish by 6 pm” |
| A follow-up | “now make it more casual”, “cut the second option” |
On a phone, save your favorite setup as a system prompt so every new chat starts with it. In Personal LLM you can set one per chat, or a default in Settings, and switch between presets like Creative and Precise depending on the job.
Frequently asked questions #
What is the most useful thing to ask AI? #
Anything that turns your messy input into something clean: a rough message into a polite one, notes into an email, a pile of ingredients into a dinner plan, a confusing paragraph into plain English. Those tasks play to what language models do best.
What should you not ask an AI chatbot? #
Don’t rely on it for today’s news, exact citations, obscure facts or medical diagnoses. And with a cloud chatbot, don’t paste passwords, ID numbers, card details or other people’s private information.
Can I ask an AI chatbot personal questions? #
You can, but think about where the conversation is stored. Cloud chatbots keep chats on their servers and may use them for training depending on your settings. An offline app that runs the model on your phone keeps personal conversations on the device.
Do these prompts work without internet? #
Almost all of them do with an on-device model, because they only need language skills, not live information. The exceptions are anything about current events, prices or opening hours, which need a chatbot with web search.