PureMarkdown vs Aitopus

Features： 1.Cross-device Sync Sync across iPhone / iPad / Mac with no device limits and real-time updates 2.Privacy & Security Notes are stored only in your iCloud. No external servers or background data collection 3.Efficient Writing Support for note templates and custom templates for quick creation; keyboard shortcuts available on Mac 4.Multiple Export Formats Export notes as images, PDFs, or mind maps for easy sharing, archiving, and structuring 5.Data Migration Batch import and export of Markdown notes for easy backup and migration 6.Organization Manage notes with notebooks and tags to keep your content well-structured If you are looking for a simple, privacy-focused note-taking app that works seamlessly across devices, PureMarkdown is a great choice. This app does not collect user data. All content is stored only in the user’s iCloud account.

Powerful AI without giving up your data. Aitopus is a private AI workspace where you chat with state of the art models, running entirely on your device or through your own accounts with leading AI providers, while every conversation, file, and setting stays local. NO ACCOUNT. NO TRACKING. NO CLOUD SYNC. No sign up, no telemetry, no Aitopus servers. Your chats and documents live in a local database on your device, and nothing leaves it unless you explicitly connect a cloud provider. RUN AI FULLY ON YOUR DEVICE - Download open models like Gemma, Qwen, OpenAI's gpt-oss, and Phi from a curated catalog that picks the right size for your hardware - Fast local inference with Metal acceleration, tuned for Apple silicon - Works completely offline: on a plane, in the field, or anywhere privacy matters OR BRING YOUR OWN CLOUD MODELS - Connect your own API keys for OpenAI, Anthropic, Google, Mistral, Z.AI, and xAI - Keys are stored on your device and used only to call the provider you choose - Switch between local and cloud models without leaving your conversation CHAT WITH YOUR DOCUMENTS, PRIVATELY - Attach PDFs, Word, Excel, and PowerPoint files, text, and source code - Local retrieval (RAG): documents are indexed on your device, never uploaded to any cloud index - Ask questions, summarize, extract, and compare across files A SERIOUS CHAT WORKSPACE - Multiple sessions with full history, message editing, and conversation branching - Markdown, code highlighting, and math rendering - Reasoning effort and context window controls for power users - Export and import conversations as portable backups, so your data is never locked in - Available in English, French, German, Spanish, Italian, Portuguese, Greek, and Turkish BUILT FOR APPLE SILICON Aitopus is a native app designed for M series Macs and modern iPhones and iPads. The model catalog only offers you models your hardware can actually run well, so local AI stays fast and responsive. FREE, WITH NOTHING TO UNLOCK Aitopus is free, and its core will stay free forever. No subscription, no ads, no data harvesting. YOUR DATA, YOUR RULES With local models, your prompts never leave the device. With a cloud provider and your own key, messages go directly to that provider under your own agreement with them. Aitopus never sits in the middle. Note: Local model availability depends on device memory. Cloud providers require your own API key and may charge for usage under their terms. AI generated content can be inaccurate, so verify important information.