Leaf vs AI Agent Builder
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Leaf
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Private, offline AI chat that lives entirely on your iPhone. Leaf pairs a calm, botanical interface with Appleβs on-device Foundation Model so you can brainstorm, write, summarize notes, and work through codeβeven in Airplane Mode. No cloud servers. No accounts. No subscriptions. WHY LEAF IS DIFFERENT β’ 100% On-Device & Offline β Every prompt and response is generated locally on your iPhone using Apple Intelligence. Zero data leaves your device, and zero water or cloud data-center energy is used. β’ 4-Layer Context & Memory Engine β Inspired by modern LLM memory systems, Leaf combines session context, long-term user memories, recent chat summaries, and a smart token-based sliding window so it remembers who you are across conversations. β’ Transparent, Editable Memory β Leaf automatically learns your preferences, skills, and goals as you chatβor you can add, edit, and delete memories anytime in the built-in Memory & Context Inspector. β’ Smart Cross-Chat Summaries β When you switch topics, Leaf summarizes past threads on-device so you can pick up right where you left off. β’ No Account & No Subscription β Open Leaf and start chatting immediately. No sign-up, no email, no token paywalls, and no recurring fees. BUILT FOR REAL WORK & EVERYDAY THINKING β’ Summarize rough meeting or lecture notes into crisp checklists β’ Draft warm, concise replies and emails without filler β’ Debug code, compare architectures, and brainstorm weekend projects β’ Pin important threads and inspect real-time token capacity at a glance YOUR WORDS STAY YOURS In a world of cloud AI that harvests conversations for training, Leaf takes a quieter, local-first approach. Your thoughts stay on your phoneβwe canβt read them, and we never will.
AI Agent Builder
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This app turns your iPhone and iPad into a complete workshop for building, customizing, and running your own AI agents. Design an agent's personality, connect it to tools, chain multi-step workflows, and chat with it in real time β all without writing a single line of code. NEW IN VERSION 2.0 Template Gallery β Skip the blank page. This app now includes a dedicated Templates tab with ten professionally designed, ready-to-use agents: Research Assistant, Code Reviewer, Content Writer, Data Analyst, Travel Planner, Study Tutor, and more. Add any template to your library in a single tap, or open it in the builder to customize. Redesigned Dashboard β The home screen is now a dashboard. See your agent stats at a glance, jump into common actions instantly, and browse featured templates the moment this app opens. Demo Mode β Explore every feature with realistic sample data, with no API key required. BUILD AGENTS YOUR WAY A 12-step guided builder walks you through every part of your agent Choose from multiple AI providers: Claude, GPT, Gemini, and Groq Add your own OpenAI-compatible providers such as Ollama, Together AI, Mistral, and DeepSeek 20 built-in tools including web search, calculator, weather, translation, email, and file operations Connect Model Context Protocol (MCP) servers for extended tool access Create sub-agents that your main agent can delegate to Design visual workflows with conditions, loops, and branching Fine-tune temperature, token limits, and streaming behavior CHAT AND ITERATE Test your agents in a live chat with real-time tool execution Export agents as JSON to back up, reuse, or share Edit any agent at any time in the builder PRIVACY FIRST Your API keys are stored locally on your device and are only ever sent to the AI provider you choose. This app does not collect or transmit your data to any third party. NOTE: This app requires your own API key from an AI provider. Groq offers a free tier, so you can get started at no extra cost. Demo Mode lets you preview this app with no key at all.
Screenshots
Verdict
The clearest difference is price: Leaf at Free against AI Agent Builder's $2.99. AI Agent Builder's advantage is update cadence (every 10 days vs every 3 months) and iOS requirement (17.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Leaf is free to download; AI Agent Builder costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Leaf ships an update every 3 months, AI Agent Builder every 10 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | Leaf | AI Agent Builder |
|---|---|---|
| Price | Free β better | $2.99 |
| Update frequency | Every 3 months | Every 10 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPad β better |
| Requires iOS | 26.0 | 17.0 β better |
| Further details β not scored | ||
| Size | 7 MB | 6 MB |
| Age rating | 17+ | 4+ |
| Developer | Big Numbers, Inc. | Yuhsiu Lai |
In-app purchases
Leaf
No in-app purchases
AI Agent Builder
No in-app purchases









