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Napkin-to-App Studio AI

DAY 002 / 100 Interactive Fair Bill Splitter

Adjust the receipt, tip %, non-drinker toggles, or extra appetizers below — math & Venmo text update live

Total Dinner Receipt (+Tip)
$240.00 ($200 + $40 Tip)
Compiled from Napkin Box #1 & #2
🧾
Non-Drinker Fair Share
$49.00 Saves $11 vs Even Split
Never pays for other people's cocktails
🥗
Group Split Status
100% Balanced to the Penny
Ready to paste into iMessage / Venmo
📲
STEP 1 Hand-Drawn Napkin Sketch
4 Scribbled Boxes
✏️ Dinner Bill Splitter Idea
1. Receipt Subtotal: $200.00
Shared DrinksPool: $48 | Extra Appetizer: $24
2. Tip % Buttons:
[ 15% ] [ 18% ] [ ✓ 20% ] [ 25% ]
3. Friends & Fair Split Toggles:
  • • Alex — [ Shared Drinks ✓ ]
  • • Sarah — [ 🚫 No Alcohol Toggle! ]
  • • Mike — [ + Extra Nachos ($24) ]
  • • You — [ Shared Drinks ✓ ]
4. [ Button: Copy Venmo Group Text → ]
STEP 2 Live Working Calculator
Click Toggles to Test
Select Tip %:
STEP 3 1-Click Group Chat / Venmo Text
Ready to Send
📱 Paste Straight Into iMessage / WhatsApp / Venmo:
📦 BUILD IT YOURSELF • DAY 002 INSTRUCTIONAL SHIP KIT

Want to Build, Customize & Host Your Own Napkin-to-App Studio AI (Fair Dinner Bill Splitter)?

Copy the free 1-Shot Master Prompt below to start in any AI tool, or grab the complete Build-Your-Own Ship Kit (.zip) with the exact plain-English prompts, step-by-step build instructions, required AI tools checklist, and 60-second free hosting blueprint.

📦 Buy Day 2 Build-Your-Own Kit — $13
🚀 Free 1-Shot Master Build Prompt Paste into Claude, ChatGPT, or Antigravity 
Build a complete, single-file interactive web app called Napkin-to-App Studio AI (Fair Dinner Bill Splitter) that solves: Turning a messy napkin drawing into a real group dinner bill-splitter that handles non-drinkers & extra appetizers + writes a 1-click Venmo group text.

Step 1 (Layout & Counters): Build a split-screen workspace with my rough hand-drawn napkin sketch on the left, a live working app preview in the middle, and a 1-click group text summary on the right.

Step 2 (Core AI Logic & Scanner): Read the four scribbled boxes from my drawing — total receipt, tip percentage buttons, friend list, and fair-split toggles — and wire them up so toggling No Alcohol or Extra Appetizer automatically recalculates everyone's exact share down to the penny.

Step 3 (1-Click Action & Export): Generate a clean, friendly group text breakdown showing everyone's exact share with a 1-click Copy button at the bottom.

Design Requirements: Clean dark-mode UI (#0A0D14 background, slate-900 cards, cyan/amber/emerald highlights, Inter + JetBrains Mono typography), pre-loaded realistic sample data so it works in 1 click, and a 1-click Copy/Export button at the bottom.
Single Build Kit Day 2
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