Over a decade of solo app development has taught me that when AI tooling multiplies month after month, the real skill isn't picking the best tool—it's knowing when each tool fits best.
As of April 2026, app developers have four genuinely usable options. Each excels in different phases and carries different cost profiles. Rather than picking one, smart developers combine all four strategically. This approach cuts both token spend and development time.
The Four Real Options (Not Hype)
GitHub Copilot remains the most deployed, though the pricing tiers deserve close attention. Free Inline Suggestions work, but professional-grade development requires Pro (US$10/month) or Pro+ (US$39/month). The Pro+ value proposition is Copilot Agent, which auto-converts GitHub Issues into pull requests. Copilot CLI went GA in February, making terminal-first workflows possible for the first time.
Claude Code is Anthropic's web-based IDE. Complete app development happens in the browser. For Node.js, Python, and React Native, it's production-ready. iOS/Android native development? Not designed for it. Token-metered pricing means big projects accumulate costs fast—expect 500K tokens for a medium app (roughly JPY 3,000).
Rork is an AI-driven React Native app builder laser-focused on mobile. UI sketches, screen logic, and implementation come from AI prompts. For solo developers chasing App Store / Google Play, it's the shortest path. The tradeoff: generated code sometimes needs manual refinement for edge cases.
Local LLMs (Gemma 4 on MLX, for instance) run inference on-device. No API bills. Measured throughput is 41 tokens/sec—plenty for real work. Privacy is maximized. Long-term ROI beats cloud APIs if you build the infrastructure once.
Task-by-Task Breakdown
| Task | Copilot | Claude Code | Rork | Local LLM |
|---|---|---|---|---|
| Spec & architecture docs | Strong | Strong | Weak | Weak |
| UI/UX wireframes | Weak | Strong | Strong | Weak |
| Standard boilerplate (API calls, DB) | Strong | Strong | Strong | Strong |
| Test automation | Strong | Medium | Weak | Medium |
| Debug & root-cause | Strong | Strong | Medium | Strong |
| Refactor legacy code | Strong | Strong | Medium | Strong |
The pattern: when intent is crystal clear, multiple tools work. When UI design is the blocker, Rork dominates. When modifying existing code, Copilot or Claude Code give finer control.
Real Cost Numbers
Copilot Pro+ runs US$39/month with ~1,500 requests/month. Overage is ~US$0.003 per request. Reasonable if you hit 50/day.
Claude Code: measured token burn for a medium app is ~500K tokens, roughly JPY 3,000/month. Scale to three simultaneous projects and that becomes a line item.
Rork pricing varies by app complexity. Flat monthly fee means per-app cost drops as you ship more.
Local LLM: US$500–2,000 hardware setup, then electricity (~JPY 500/month). Break-even at 4–6 months.
My Actual Workflow (April 2026)
Rook: Days 1–3, sketch to polished UI and working scaffolding. Claude Code: Days 4–10, business logic deep work. Copilot CLI: Days 11–14, test automation and App Store prep. Local LLM: Backup tool for offline work or code search; not yet primary.
Monthly spend: Copilot Pro (US$10) + Claude Code (JPY 3,000 typical) + Rork (per-app tier) = sustainable for solo play.
What Actually Matters
Pick one tool. Use it for one week. Compare notes to online reviews. Your week beats internet opinion every time.
Start with Rork if building from scratch. Switch to Claude Code once screens lock down. Polish with Copilot before submission. Done.