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Code Your Own Bill Splitter in Python (Tutorial)

So you want a bill splitter that actually fits how you and your friends handle a check — not a generic app with ads and features you’ll never touch. This walkthrough covers the Python route, then shows a faster path: building your own in Auto.

The classic Python project

If you’re learning to code, writing a bill splitter is a great early project. The logic is simple enough to reason about but real enough to be useful. A basic version prompts for the total, the tip percentage, and the number of people, then prints each person’s share:

total = float(input("Total: "))
tip_pct = float(input("Tip %: "))
people = int(input("Split how many ways? "))

grand_total = total * (1 + tip_pct / 100)
per_person = grand_total / people

print(f"Each person pays: ${per_person:.2f}")

Tutorials from freeCodeCamp (build a bill splitter in Python) and Hyperskill’s bill splitter project take this further — creating a bill split and tip calculator using Python that handles uneven splits, rounding, and validation. Working through one is genuinely worth it if your goal is to learn Python.

But if your real goal is a tool you’ll use — one that reads receipts, remembers past bills, and assigns items to specific people — a command-line script gets tedious fast. That’s where building your own in Auto comes in.

Building your own in Auto

Auto is camera-first: you describe what you want and snap a photo, and it builds you a personal mini-app (a “Frame”) around it. For a bill splitter, that means:

  1. Describe it. Tell Auto you want to scan receipts, calculate tips, and split totals with friends. Mention your situation — recurring dinners, roommates, a group trip.
  2. Snap a receipt. Auto uses the photo to shape how your Frame reads and structures real bills.
  3. Refine it. Ask for exactly the split logic you want — even splits, per-item assignment, tax handling.

You get an app tailored to your people and your habits, in minutes, with no code and no app store. People have already built ones like Bill Splitter — proof this pattern works.

How someone built theirs

One real Auto user started narrow. Their first prompt asked for a Frame called “Receipt Scanner” that pulled structured data out of receipt photos — merchant, date, itemized lines, subtotal, tax, tip, and total — storing each scan as history with a monthly spend banner and a clean card layout.

Once scanning worked (after fixing one build error along the way), they expanded it: they added a way, right on each receipt’s detail page, to calculate tip and split the check — either evenly or by assigning items to individual people. Then they refined the split so it correctly handled tax and tip too, not just the raw subtotal.

Finally they updated the name and description to match the new, broader functionality. What began as a scanner became a full bill splitter — shaped step by step around exactly what they needed.

FAQ

Do I need to know Python to build this in Auto? No. Coding it yourself is a great learning exercise, but Auto builds your Frame from plain descriptions.

Can it split by item, not just evenly? Yes — you can ask for per-item assignment, and include tax and tip in each person’s share.

Can I change it later? Yes. Like the user above, you can start simple and keep refining your Frame as your needs change.