LocalEngine: Think Tank

About this app

<p>LocalEngine runs open-source AI language models entirely on your iPhone and iPad. Everything happens on-device: your prompts, conversations, and images never leave your device and are never sent to any server.</p>
<p>Built in pure Swift with SwiftUI, LocalEngine runs models through a Metal-accelerated llama.cpp engine, so you get fast, low-latency AI completely offline — no account, no sign-in, no cloud.</p>
<p>WHAT YOU CAN DO</p>
<p>• Chat — Hold multi-turn conversations with a local model. Replies stream token-by-token in real time. Start a new chat or stop a response at any time.</p>
<p>• See images — Turn on vision in Settings, attach photos to your message, and ask about them. Images are understood entirely on-device by a vision-capable model.</p>
<p>• Download models — Browse a curated catalog of open models and download the one that fits your device. Downloads run as resumable background jobs with live progress, and the screen can stay awake while a large model downloads.</p>
<p>• Tune generation — Adjust the response length (max tokens) and the temperature to shape how the model replies.</p>
<p>• Unlock larger models — LocalEngine is free to use with starter models. A one-time Pro upgrade unlocks larger catalog downloads on iPhone and iPad.</p>
<p>CURATED MODELS</p>
<p>LocalEngine is ready to chat out of the box with a small, fast default model, and its catalog includes compact vision-language models you can grow into:</p>
<p>• Qwen3.5 — 0.8B and 2B free, with 4B available through Pro<br />
• Gemma 4 — E2B free, with E4B available through Pro</p>
<p>Smaller models are quick and light on storage; larger Pro models are more capable on newer devices. Each vision model pairs with a multimodal projector so it can understand images — all on-device.</p>
<p>PRIVATE BY DESIGN</p>
<p>• 100% on-device inference — no cloud, no telemetry, no analytics.<br />
• No account and no sign-in required.<br />
• Runs fully offline once a model is downloaded.<br />
• Built to App Store privacy and security standards.</p>
<p>REQUIREMENTS</p>
<p>• iOS / iPadOS 17.0 or later<br />
• A recent iPhone or iPad is recommended, especially for the larger models<br />
• Free storage space for the models you choose to download</p>
<p>LocalEngine puts the power of modern AI — text and vision — in your pocket, without giving up your privacy.</p>