Agent Lab: Learn AI Agents
See how your agent thinks
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Run open-source models on-device — no API key — or connect a cloud model. See every agent step: prompts, tool calls, tokens, latency. Understand how agents really work.
Agent Lab is a learning and experimentation playground for AI agents, built for AI learners, agent developers, and product managers. It doesn't just run agents — it makes every step of an agent's execution visible, so you can finally understand how agents actually work.
Unlike an ordinary AI chat app, Agent Lab is about learning, experimenting, debugging, and visualization. On every run you can see the prompts, tool calls, retrieval, tokens, and latency — nothing is hidden.
Get started fast
· On-device local models: download a small Qwen model on first use (Wi-Fi recommended), then run it fully offline — no API key and no second machine required. Cost is always 0, and tokens and latency are shown for real.
· Download on demand: grab other open-source models your device can actually run, with capability gating based on your chip and memory.
· Cloud models: works with Chat Completions-compatible APIs (DeepSeek, Moonshot, OpenRouter, and more) and Anthropic Claude — just enter your key, base URL, and model.
Three built-in demos
· Customer Support Agent — demonstrates tool calling and workflow with a built-in mock order system, no real backend needed.
· RAG Knowledge Base — comes with curated reference docs (LangGraph, MCP, LLM APIs, Python) and lets you upload your own PDF / Markdown / TXT, then inspect the retrieved chunks, similarity scores, and final answer.
· Research Agent — shows how an agent plans on its own: Planner → Search → Read → Summarize → Answer.
Unified visual debugging
Every demo offers three views:
· Timeline — the full step-by-step sequence of LLM and tool calls
· Graph — the workflow graph, highlighting the active node as it runs
· Console — expand any step to see System / User / Assistant prompts, the complete LLM request and response JSON, tool requests and responses, tokens, estimated cost, latency, and errors
Security and privacy
· API keys are stored encrypted on-device via the system Keychain — local only, never uploaded to any server.
· Uploaded knowledge-base files and the vector indexes built from them stay on your device and can be deleted anytime.
· On-device inference runs fully offline; your data never leaves the device.
No sign-up, no login — open it and go. Make every step an agent takes visible.
Ratings & Reviews
Minor update: the custom endpoint preset has a clearer name, and one built-in reference document has been renamed. Your saved models and API keys are unaffected.
The developer, 燚 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 燚 张
- Size
- 29.9 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- A meal $3.99
- Coffee $1.99
- Cola $0.99
- AgentLab Pro $2.99
- Copyright
- © 2026 Durian