https://localhost41.com/blog.html On-device AI, made human. Notes on building private, local-first AI apps with QVAC. en https://localhost41.com/articles/what-is-qvac.html https://localhost41.com/articles/what-is-qvac.html QVAC is Tether's open-source platform for running AI models directly on your own device, with no cloud and no account. Here's what it is and why it matters. Sun, 19 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-sdk-explained.html https://localhost41.com/articles/qvac-sdk-explained.html The QVAC SDK is the main entry point for building local-first AI apps. What it exposes, how models are loaded, and what to expect when building on it. Sat, 18 Jul 2026 00:00:00 GMT https://localhost41.com/articles/how-to-build-a-qvac-app.html https://localhost41.com/articles/how-to-build-a-qvac-app.html A practical sequence for building your first local-first AI application on the QVAC SDK, and the constraints to plan around. Mon, 13 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-agents-explained.html https://localhost41.com/articles/qvac-agents-explained.html An agent takes actions, not just generates text. Running one locally changes its risk profile entirely, because a local agent reads your files where they already are. Fri, 10 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-openai.html https://localhost41.com/articles/qvac-vs-openai.html How QVAC's on-device platform compares to OpenAI's hosted models — and the compatibility layer that lets you use both. Thu, 09 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-local-ai-use-cases.html https://localhost41.com/articles/qvac-local-ai-use-cases.html Practical applications where on-device AI outperforms the cloud — and the cases where it honestly does not. Wed, 08 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-ollama.html https://localhost41.com/articles/qvac-vs-ollama.html Ollama runs open models on your desktop. QVAC is an SDK for shipping local-first apps, including on phones. They solve different problems, and both can be the right answer. Sat, 04 Jul 2026 00:00:00 GMT https://localhost41.com/articles/qvac-workbench-guide.html https://localhost41.com/articles/qvac-workbench-guide.html QVAC Workbench is Tether's local AI app for phones and desktops. What it does, what Delegated Inference means, and how to use it to choose a model. Fri, 26 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-lm-studio.html https://localhost41.com/articles/qvac-vs-lm-studio.html LM Studio is a desktop application for downloading and chatting with local models. QVAC is a platform for building applications on them. Here is the practical difference. Tue, 23 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-health-guide.html https://localhost41.com/articles/qvac-health-guide.html QVAC Health aggregates wearable data into an encrypted offline dashboard, with on-device AI for natural-language logging and meal photo analysis. Here is how it works and why its architecture matters. Sun, 21 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-apple-intelligence.html https://localhost41.com/articles/qvac-vs-apple-intelligence.html Apple runs some AI on your iPhone and sends the harder requests to its own servers. QVAC sends nothing anywhere. The difference is where the boundary sits, and who controls it. Wed, 17 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-android-ai.html https://localhost41.com/articles/qvac-vs-android-ai.html Android's on-device AI is Google's model, on Google's terms. QVAC is open source, model-agnostic, and assumes no account. A comparison of the two approaches. Mon, 15 Jun 2026 00:00:00 GMT https://localhost41.com/articles/best-qvac-apps.html https://localhost41.com/articles/best-qvac-apps.html The applications built on QVAC, from Tether's own Workbench and Health to independent local-first tools. What each does, and how to tell a genuine local app from a marketing claim. Thu, 11 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-local-llms.html https://localhost41.com/articles/qvac-vs-local-llms.html Running a local LLM gives you text generation. A real application also needs search, document reading, and speech. QVAC provides all of it on-device through one interface. Tue, 09 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-developer-resources.html https://localhost41.com/articles/qvac-developer-resources.html Where QVAC's documentation and source live, what to read in which order, and the one thing to build before anything else. Thu, 04 Jun 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-private-ai-assistants.html https://localhost41.com/articles/qvac-vs-private-ai-assistants.html Many assistants describe themselves as private. Very few run on your device. Here is how to tell the difference. Mon, 25 May 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-cloud-ai-explained.html https://localhost41.com/articles/qvac-vs-cloud-ai-explained.html Quick, plain answers to the most common questions about QVAC vs cloud AI — is it more private, does it work offline, is it cheaper, and what's the catch. Sun, 24 May 2026 00:00:00 GMT https://localhost41.com/articles/qvac-monorepo-map.html https://localhost41.com/articles/qvac-monorepo-map.html A complete guide to QVAC's repository structure — every package in /packages, what it does, and how the SDK, addons, core libraries, and tools fit together. Wed, 06 May 2026 00:00:00 GMT https://localhost41.com/articles/is-qvac-production-ready.html https://localhost41.com/articles/is-qvac-production-ready.html We're building consumer apps on QVAC. Here's a candid evaluation of the SDK's maturity — the repo signals, what works, what doesn't, and who should and shouldn't build on it today. Sat, 02 May 2026 00:00:00 GMT https://localhost41.com/articles/private-finance-no-bank-linking.html https://localhost41.com/articles/private-finance-no-bank-linking.html Most finance apps require linking your bank through a third party like Plaid. Local Money (coming soon) won't — here's why on-device finance without a live bank connection will be more private, and how it will work. Thu, 30 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-voice-assistant.html https://localhost41.com/articles/qvac-voice-assistant.html QVAC chains transcription, text generation, and text-to-speech into a real-time voice loop that runs entirely on your device. Here's how to build a voice assistant that never sends your voice to the cloud. Wed, 29 Apr 2026 00:00:00 GMT https://localhost41.com/articles/on-device-rag-qvac-local-notes.html https://localhost41.com/articles/on-device-rag-qvac-local-notes.html A technical look at how localhost/AI is building retrieval-augmented chat over private notes using QVAC's on-device embeddings, vector search, and LLM — with nothing leaving the device. Tue, 28 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-delegated-inference.html https://localhost41.com/articles/qvac-delegated-inference.html QVAC lets a device delegate AI inference to a peer over an encrypted P2P connection — your phone offloading to your desktop, no cloud involved. Here's how delegated inference and blind relays work. Sun, 26 Apr 2026 00:00:00 GMT https://localhost41.com/articles/what-is-qvac-guide.html https://localhost41.com/articles/what-is-qvac-guide.html QVAC is Tether's open-source engine for running AI directly on your device — no cloud, no account, nothing leaving your phone. Here's what it is and why it matters, in plain English. Sat, 18 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vla-robotics.html https://localhost41.com/articles/qvac-vla-robotics.html QVAC ships vision-language-action support — turning camera frames, robot state, and natural-language instructions into robot control, entirely on-device. Here's what VLA is and why local inference is non-negotiable for robots. Wed, 15 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-bci-explained.html https://localhost41.com/articles/qvac-bci-explained.html QVAC ships brain–computer interface transcription — decoding multi-channel neural signals into text, entirely on-device. Here's what that is, why local processing matters more here than anywhere else, and where it points. Tue, 14 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-architecture.html https://localhost41.com/articles/qvac-architecture.html A technical walkthrough of QVAC's internals — the Bare worker, the singleton RPC client, lazy initialization, and the four-phase lifecycle from loadModel() to close(). Sun, 12 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-capabilities-guide.html https://localhost41.com/articles/qvac-capabilities-guide.html Every AI capability in the QVAC SDK — text generation, embeddings, RAG, fine-tuning, multimodal, image and video generation, transcription, TTS, voice assistant, translation, BCI, VLA, OCR, and image classification. All on-device. Sun, 05 Apr 2026 00:00:00 GMT https://localhost41.com/articles/qvac-vs-cloud-ai.html https://localhost41.com/articles/qvac-vs-cloud-ai.html The difference between running a model on your device and sending your data to someone else's. A structural comparison, not a feature list. Sat, 04 Apr 2026 00:00:00 GMT