LatentChat vs Synapse

Try different generative language models with LatentChat, a fully offline, on-device private AI chatbot. LatentChat is ready to use right out of the box. Ask questions, brainstorm, reason, transcribe speech, add your own models and create with your customized chat companion from anywhere, even without an internet connection. - Local chat Try models like Llama, Gemma, Qwen and Mistral or use your own local LLMs by selecting your preferred open-source language models stored on your device. Reasoning models are supported, too. - Remote chat LatentChat can be used as a client to connect to any OpenAI-compatible and Anthropic-compatible API endpoint, whether it is running on your own private servers like Ollama, LM Studio or on cloud services OpenRouter (Bring your own API Key). - Retrieval-Augmented Generation (RAG) Create your knowledge center from text or files (PDF, TXT, JSON, HTML) and retrieve your documents while you chat to ask related questions or summarize. A RAG system can also help the model reduce hallucinations by referencing the knowledge you added. - Vision capabilities Try multimodal models like Qwen 3 VL, InternVL and LFM2.5 with vision capabilities, to analyze images or extract text. - Transcription and Voice (STT and TTS) Transcribe recordings or audio files with Whisper and read messages aloud with different voice styles. Multiple languages are supported. - System Prompts Use System Prompts to personalize your conversations by providing custom instructions that can modify the behavior or personality of the AI. Features: == Completely offline and on-device processing == Your prompts remain private and are never shared == Model catalog: a selection of LLMs downloadable from HuggingFace == Bring your AI models: download and choose your favorite LLMs (.gguf) == Connect to servers like Ollama or LM Studio for more powerful models == Local RAG: Integrate your own knowledge from text == Vision capabilities with multimodal models to process images == Text to speech: read messages aloud (English, Spanish, French, Portuguese) == Multilingual transcription (STT) using Whisper == Customize system instructions and parameters == Shortcuts integration == No subscriptions, buy once and get any update Read the terms and privacy policy before using this app, available on latentlake.com/termspolicy/chat-policy-terms

Speak, and Synapse turns what you say into an organized note with a title, a summary, key points and a list of action items. Everything happens on your iPhone: your voice is never sent to a server. Built for people who handle sensitive information, like lawyers, doctors, journalists and executives, and for anyone who would rather keep their ideas in their pocket. TRULY PRIVATE • Transcription and AI run on your device. No servers, no cloud, no account. • Works in Airplane Mode, on the subway or in the mountains. • We collect no data: no analytics, no ads. HOW IT WORKS • Tap and talk: a quick idea or a whole meeting. You see the text as you speak. • When you stop, your device's AI reads the whole transcript, however long: it adds a title, writes a summary, sorts the key points into sections and pulls out the action items. • The note keeps what you said, word for word, split into paragraphs where you pause. • Check off tasks, copy the note as Markdown or send it to Obsidian. KNOWS WHO SAID WHAT • Record a meeting or a conversation and each person gets their own turns in the note. • Tap a name to rename it: the change reaches the title, the summary and the action items too. IN 25 LANGUAGES • Transcribes 25 European languages, including English, Spanish, French, German, Italian and Portuguese. • It detects the language you speak, or you choose the language of the note. TURN VOICE MESSAGES INTO NOTES • Got a long voice message on WhatsApp or Telegram, or a recording in Files? Share it to Synapse and get a transcript, a summary and action items. • On iPad, drag one or several audio files onto Synapse and each becomes a note. • The audio is processed on your device and is never uploaded. FOR EVERY MOMENT • Apple Watch: capture an idea from your wrist. • CarPlay: dictate an idea from your car's screen and see your recent notes. • iPad: review and organize your notes on a bigger screen. NO SIGN-UP • No email, no password, no credit card. • No note limit: only your device's storage. UPFRONT ABOUT HOW IT WORKS • On first launch, Synapse asks before downloading its speech models: Parakeet, an open speech recognition model based on NVIDIA's work, and a small model that tells speakers apart (about 800 MB in total). They download once; after that everything works offline. • Titles, summaries and action items come from Apple Intelligence, built into the system. Synapse requires a device that supports Apple Intelligence (iPhone 15 Pro or later, or an iPad with Apple Intelligence) with Apple Intelligence turned on. From a thought to an organized note, without anyone else reading it.