Building a Full App with Lovable + Claude + Gemini: A Case Study
A software engineer with no fullstack/frontend experience built Earnest — a free app that helps users track bank account bonuses (open account, meet requirements, collect bonus, close it, repeat). The stack combined Lovable, Claude, and Gemini to produce a working product with over 100 real users.
Stack & Surprising Findings
- Lovable handled UI and scaffolding — got the developer from zero to a real app "embarrassingly fast."
- Claude was far better at understanding intent when the full user flow was described instead of individual features.
- Gemini served as a useful second opinion when the developer was stuck.
- The hardest part wasn't the AI itself — it was knowing what to ask for.
Results
- 19+ active promotions tracked
- $9,700+ in available bonuses tracked
- 100+ real users
- $5,000+ in bonuses earned by users so far
The app is live at earnest.lovable.app. The developer is open to sharing more about specific prompts that worked, what failed completely, and how they debugged without being able to read the code properly.
📖 Read the full source: r/ClaudeAI
👀 See Also
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Running 20 Claude Code terminal windows simultaneously with ADHD traits
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Using Claude as a Learning Mentor with Documentation Context
A developer shares a method for using Claude as a learning tool by feeding tool documentation into its context and using a specific prompt to create a task-based mentor. The approach skips traditional courses and tutorials in favor of hands-on learning with immediate feedback.