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Applied AI Engineering, Founder-Led

AppSimple is the applied-AI studio of Charles Feinn — a senior engineer with 12+ years of experience and an M.S. in AI/ML. I help startups and established businesses turn large language models into real, dependable products, not throwaway demos.

What I build:

  • Min project size
    $10,000+
  • Hourly rate
    $100 - $149 / hr
  • Employees
    Freelancer
  • Year founded
    Founded 2013

Service Lines
AI Agents
25%

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Pricing Snapshot

Min. project size $10,000+
Avg. hourly rate $100 - $149 /hr
Rating for cost 5 /5

Most Common Project Size

$10,000 - $49,999 based on 1 review
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

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AI Web App Development & UX/UI Design for Consulting Firm

  • AI Development UX/UI Design Web Development
  • $10,000 to $49,999
  • Oct. 2025 - Apr. 2026
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"AppSimple LLC was positive, proactive, and knowledgeable."

Jun 18, 2026
Founder, Agent Done
Benjamin Fitzgerald
Verified
  • Business services
  • Latvia
  • 1-10 Employees
  • Online Review
  • Verified

AppSimple LLC designed and developed a web-based application for a centralization consulting firm. The team's solution generated interactive financial reports using spreadsheet data and AI-written commentaries.

Showing 1-1 of 1 Reviews

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Benjamin Fitzgerald