10 Useful Apps You Can Build with AI in 5 Minutes
People underestimate what you can build in an afternoon with an AI and no technical background. Not toy demos. Not throwaway experiments. Genuinely useful things that save time, reduce confusion, and solve specific problems — the kind of tools that, a few years ago, would have required hiring a developer or settling for a spreadsheet that almost does the job.
Every app on this list was built in under 5 minutes and put online in under 10 seconds. No developer needed.
If you have Claude or ChatGPT, you can build any of these today. And if you add the Deplixo connector to your AI first — instructions for Claude or instructions for ChatGPT — you can get a live, shareable link without ever leaving the conversation.
1. PTO Calculator
What it does: You enter your accrual rate, days already taken, and remaining days in the year, and it tells you exactly how many vacation days you have left — and how many you’ll have by any date you pick.
The prompt:
Build me a PTO calculator. I should be able to enter my accrual rate (days per month), how many days I’ve already taken, and today’s date. Show me how many days I have now and how many I’ll have by any date I choose. Put it online with Deplixo.
Why it’s useful: HR software shows you a number somewhere buried in a portal. This shows you what you actually want to know: “Can I take that week off in October?”
2. Meeting Cost Timer
What it does: You enter the number of people in the meeting and their rough hourly rates, hit start, and watch a real-time counter tick up showing exactly what this meeting is costing by the second.
The prompt:
Build a meeting cost calculator. I enter the number of attendees and an average hourly rate, then hit Start. Show a live timer counting up in dollars as the meeting runs. Make it a little dramatic. Put it online with Deplixo.
Why it’s useful: Nothing changes meeting culture faster than a running dollar counter on the screen. One team used this to cut their weekly standup from 45 minutes to 12.
3. Grocery List with Calorie Tracking
What it does: A simple list where you type grocery items and the app looks up approximate calories, showing a running total for the week’s haul.
The prompt:
Build a grocery list app. I type an item, and the app estimates its calories (rough average is fine). Show a running total. Let me check things off as I shop. Make sure the list saves between sessions. Put it online with Deplixo.
Why it’s useful: Calorie-tracking apps are either overwhelming or require a subscription. This is just a list that also does math.
4. Flashcard Quiz Maker
What it does: You paste in a list of terms and definitions (or a block of notes), and the app turns them into a flashcard quiz — show front, flip to back, mark it known or unknown, track progress.
The prompt:
Build a flashcard quiz maker. I paste in terms and definitions, separated by a colon on each line. Turn them into flashcards I can flip through. Track which ones I’ve marked as “got it” vs. “still learning.” Put it online with Deplixo.
Why it’s useful: Every student or professional preparing for a certification, interview, or exam has made flashcards in a suboptimal way. This is a better way, built in the time it takes to describe what you want.
5. Habit Tracker
What it does: A daily checklist of habits you want to build — drink water, exercise, read, whatever — with a streak counter and a simple week-view calendar showing your completion history.
The prompt:
Build a habit tracker. I can add habits with custom names. Each day I check off which habits I completed. Show a streak count and a 7-day calendar view. The data should save between sessions so I don’t lose my streaks. Put it online with Deplixo.
Why it’s useful: Habit apps in the App Store cost money, require accounts, and are full of features you don’t want. This one does exactly what you describe and nothing else.
6. Invoice Generator
What it does: You fill in your name, your client’s name, a list of line items with quantities and rates, and it generates a clean, printable invoice with a calculated total, tax line, and invoice number.
The prompt:
Build an invoice generator. I enter my business name, client name, line items (description, quantity, rate), and a tax rate. Generate a clean, professional invoice with a calculated total. Let me print it or save it as a PDF. Put it online with Deplixo.
Why it’s useful: Freelancers send invoices constantly. Most invoice tools are overkill. This is a form that produces a document — nothing more, nothing less.
7. Color Palette Picker
What it does: You describe a mood, brand, or aesthetic in plain English (“calm and professional,” “bold tech startup,” “warm bakery”), and the app generates a five-color palette with hex codes you can copy.
The prompt:
Build a color palette generator. I type a description of a mood or brand vibe, and the app generates a harmonious 5-color palette. Show each color as a swatch with the hex code. Let me click a hex code to copy it. Put it online with Deplixo.
Why it’s useful: Designers use expensive tools for this. Non-designers use this tool. Same result, zero subscription.
8. Unit Converter
What it does: A clean multi-category unit converter — length, weight, temperature, volume — where you type a number, pick units, and see the conversion update instantly without hitting a button.
The prompt:
Build a unit converter covering length, weight, temperature, and volume. I pick a category, type a value, select the input unit and output unit, and see the result instantly as I type. Clean, minimal design. Put it online with Deplixo.
Why it’s useful: The built-in calculator app does unit conversion, but nobody remembers that. A dedicated tool you can share with a link is more useful than a buried feature.
9. Tip Calculator
What it does: Enter a bill total, choose a tip percentage (or type a custom one), and see the tip amount, the total, and the per-person split if you enter a number of diners.
The prompt:
Build a tip calculator. Enter the bill amount, choose a tip percentage with preset buttons (15%, 18%, 20%, 25%) or type a custom one. Show the tip amount, total, and the split per person if I enter a group size. Put it online with Deplixo.
Why it’s useful: Yes, phones have calculators. But a dedicated tip calculator with a split feature, on a link you can pull up at the table and pass around, is more useful than explaining arithmetic to your dinner companions.
10. Random Team Assigner
What it does: You paste in a list of names, enter how many teams you want, and the app randomly divides them into balanced groups — with a button to reshuffle if nobody likes the first draw.
The prompt:
Build a random team assigner. I paste in a list of names (one per line), enter the number of teams I want, and click Assign. Show the teams clearly. Add a Reshuffle button to randomize again. Put it online with Deplixo.
Why it’s useful: Teachers, coaches, workshop facilitators, trivia hosts — anyone who has to divide a group into teams has done this manually on a whiteboard or in their head. This takes two seconds and looks fair because it is.
How to build any of these right now
Pick an app from the list above. Copy the prompt. Open Claude or ChatGPT. Paste it in.
If you’ve set up the Deplixo connector, your AI will build the app and put it online automatically — you’ll get a live URL and a claim link in the same response. No extra steps. The full setup guide for Claude is at /guides/deploy-from-claude/ and for ChatGPT at /guides/deploy-from-chatgpt/.
If you haven’t set up the connector yet, ask your AI to build the app (leave out the “put it online with Deplixo” part), then copy the code it gives you and paste it at deplixo.com/launch. You’ll have a live URL in a few seconds with no account required.
Either way, you end up with a real working app at a real link you can share with anyone. They don’t need a Deplixo account or an AI account to use it. They just click the link.
Your app, your changes
Once an app is live, you’re not done. Stay in the conversation with your AI and keep improving it:
“Can you add a dark mode?”
“Can you make the font bigger and the buttons easier to tap on mobile?”
“Can you add a way to export the data?”
Every change gets published to the same URL. Anyone who has the link sees the updated version immediately. You’re not managing files or worrying about versions — you’re just having a conversation.
This is what building software looks like when the barrier to entry is a sentence instead of a computer science degree.
If you want to go deeper on how any of this works, How to Put Your AI App Online Without Knowing How to Code covers the full picture. And if you’re building something for your whole team to use, How to Build Internal Tools for Your Team with AI shows how the same approach scales to shared tools everyone can access.
Pick one app from this list. Build it today. It takes five minutes — and getting it online takes ten seconds.
Go to deplixo.com/launch — or just tell your AI to put it online. No account needed.