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PromptCraft Series #8 – Building AI Apps: Real Use Cases

PromptCraft Series #8 – Building AI Apps: Real Use Cases

✨ PromptCraft Series #8

"Building AI Apps: Use Cases from Real Projects"

🗕️ New post every Monday

🚀 Why This Matters

Prompt engineering powers real, revenue-generating AI apps — and many of them are built by small teams or solo creators using no-code tools. In this post, we break down 5 working use cases, with real prompts and implementation tips.

🧠 1. AI Tutor App (Personalized Study Assistant)

What it does: Explains topics, asks quiz questions, tracks learning.

You are a helpful, friendly study assistant for high school students. Explain this topic in simple terms: [topic]. Then ask 3 quiz questions and wait for answers.
  • Input: Topic
  • Prompt block + chat format
  • Tracks session history with memory

Tools: Lovable + Firebase

📋 2. Invoice Summarizer (For Finance Teams)

What it does: Extracts structured data from raw invoice scans.

Extract the due date, total amount, and list of purchased items from this invoice text. Output as a JSON object.

Tools: Replit + Zapier + PDF parser API

📜 3. Blog Generator (One-Liner to Article)

What it does: Converts a topic into outline + draft content.

Act as a content writer. Expand this blog idea into an outline and write the first 3 paragraphs. Idea: [input]

Tools: Lovable + OpenAI + TinyMCE

📢 4. Complaint Responder Bot

What it does: Auto-generates professional replies to user complaints.

You are a polite customer support agent. Respond to the complaint below in a helpful, empathetic tone. Include refund info if relevant. Complaint: [complaint_text]

Tools: Glide or Lovable + Airtable

💭 5. Therapeutic Journal Bot

What it does: Reflects on user journal entries and encourages mindfulness.

You are a calm, supportive journaling assistant. Based on the following entry, reflect gently and ask 1 thought-provoking question. Entry: [user_text]

Tools: Bubble + OpenAI + Email webhook

⚙️ Common Prompt Patterns

PatternDescriptionExample
Role-basedSets identity or tone"You are a legal assistant..."
Chain-of-thoughtSequential reasoning steps"Step 1: Understand. Step 2: Generate..."
Few-shotProvides example inputs + outputs"Example 1:... Now do this one:"
Dynamic dataUses [input] placeholders"Summarize: [text]"

📈 Weekly Challenge

Pick one use case above and:

  1. Rebuild it in your favorite no-code tool
  2. Refine the prompt with your voice
  3. Add at least one bonus feature (email, image, dropdown, etc.)
  4. Post your result and tag #PromptCraft

🗓️ Coming Next Week

🔜 Blog #9 – "Multi-Agent Prompt Systems: Let Your Prompts Talk to Each Other"
Build your first multi-agent AI using coordinated prompts. Think planner bot + budget bot + feedback loop.

✅ Subscribe, Save, and Share

We’re now 8 posts in — almost to the finish line. Save this one and start building your own prompt-powered micro apps.

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