ArcaNotes vs Cinna

ArcaNotes is a different kind of note-taking app. It's designed for speed of entry ("micro-notes"), makes reviewing feel natural, streamlines sharing, and uses AI to help you organize and retrieve. ArcaNotes has a small mission and a big mission. The small mission is to make a great note-taking app that is fast, flexible, and aligned with how many of us work today. The bigger mission is for ArcaNotes to become your second brain, the place where you store all of your information. By making it effortless to retrieve, share, and review, your knowledge will be unlocked for you and others. How is ArcaNotes different? 1. It’s designed for rapid note-taking * Rather than taking long notes that cover several disparate topics, try using ArcaNotes to take “micro-notes” - short notes, each about one idea. * As soon as you have something you want to jot down, just enter it, and worry about organizing it (ie, assigning a topic) later. * The intention is for there to be nothing between your thought and the act of storing it - no friction. Capturing information is as simple as texting yourself. 2. Retrieval and review feel natural * Notes are displayed like a feed, similar to messaging apps. For many people, scrolling a feed is a more natural way to review and retrieve than clicking through nested folders. * Notes can be assigned one or more topics, and notes under that topic can be viewed, much like a channel. 3. It encourages you to share your knowledge * So much knowledge is trapped in our heads and apps. Often, we don’t share it because of the extra work required. * ArcaNotes aims to change that by making sharing and following feeds of other users’ notes easy. The intent is for a portion of your notes (the ones you want to share) to be opened up so others can quickly scan and review them. It’s a bit like how people routinely scan various message channels to catch up on other teams’ activities. 4. It leverages AI technology to help you be more productive * ArcaNotes suggests topics that best fit the content of your note, as you type. The goal is to help you work faster by doing some of the thinking about organizing for you. * Rather than searching by keyword, you can ask your notes a question. ArcaNotes will generate an answer based on the knowledge contained in your notes.

Cinna — Your AI, Your Agents Cinna is a privacy-first AI client that puts you in control. Bring your own provider keys and chat with the world's top AI models — no app subscription, no middleman. Your keys stay on your device, in the secure keychain. Orchestrate many agents and tools in one chat This is where Cinna goes beyond a simple chatbot. Combine multiple AI agents and tool servers in a single conversation and let a model conduct them for you. Ask once, and Cinna plans the work, calls each agent and tool as needed, and weaves their results into one coherent answer — every reasoning step and tool call visible, or neatly folded away. Watch delegated agents work in their own expandable sub-threads, all within the same chat. Bring your own AI Connect your own API keys for leading providers and pick the exact model you want. No lock-in, no usage markup — you pay your provider directly, and Cinna never touches your data. Unlock custom-built agents with a self-hosted Cinna server Connect your own self-hosted Cinna server to bring your custom A2A agents, MCP tool servers, and published agent bundles into the app. Browse a catalog and install agents in a tap, track their live status, and keep them up to date — all from your phone. Turn complex workflows into one-tap jobs Save an entire orchestrated process as a reusable job and run it with a single tap. A job can chain multiple MCP tools and AI agents into one automated workflow — the same multi-agent orchestration that powers your chats, captured once and repeatable on demand. Run it locally on your device or hand it off to your Cinna server as a task, and review the full run history every time. Organize jobs into folders so your most powerful workflows are always one click away. Built-in notes Keep markdown notes organized in folders and attach them straight into a chat to give your models and agents exactly the context they need. Private by design Your provider keys live in your device keychain. Your chats, notes, and jobs are stored on-device — your data stays yours. Why Cinna • Chat with any top AI model using your own keys • Orchestrated multi-agent, multi-tool conversations • One-tap jobs: complex tool-and-agent workflows, automated • A2A agents and MCP tools, including your own custom builds • Notes built in to enrich every conversation • No app subscription — pay only your provider • Privacy-first: keys and data stay yours