# LocalEngine: Think Tank — Private on-device AI runtime > Private on-device AI runtime (iPhone/iPad app by GUOYU WANG.) - Source: https://appshunter.io/ios/app/localengine-think-tank/id6779024828 (this page in markdown: same URL + `.md`) - Developer: [GUOYU WANG](https://appshunter.io/developer/1873302677) - Category: Productivity, Developer Tools - Price: Free with in-app purchases - Age rating: 12+ - Requires: iOS 17.0 · 37 MB - Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2026-06-25 - Data updated: 2026-09-04 - User reviews in markdown: https://appshunter.io/ios/app/localengine-think-tank/id6779024828/reviews.md ## What is LocalEngine? 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. 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. WHAT YOU CAN DO • 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. • 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. • 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. • Tune generation — Adjust the response length (max tokens) and the temperature to shape how the model replies. • Unlock larger models — LocalEngine is free to use with starter models. A one-time Pro upgrade unlocks larger catalog downloads on iPhone and iPad. CURATED MODELS 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: • Qwen3.5 — 0.8B and 2B free, with 4B available through Pro • Gemma 4 — E2B free, with E4B available through Pro 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. PRIVATE BY DESIGN • 100% on-device inference — no cloud, no telemetry, no analytics. • No account and no sign-in required. • Runs fully offline once a model is downloaded. • Built to App Store privacy and security standards. REQUIREMENTS • iOS / iPadOS 17.0 or later • A recent iPhone or iPad is recommended, especially for the larger models • Free storage space for the models you choose to download LocalEngine puts the power of modern AI — text and vision — in your pocket, without giving up your privacy. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Professional | $9.99 | one-time | | Local Engine Pro | $2.99 | one-time | | LocalEngine Pro | $4.99 | one-time | ## Version history (last 5 releases) ### 0.5.0 — 2026-08-26 • Now in 10 languages — the entire interface is available in English, Spanish, French, German, Brazilian Portuguese, Japanese, Korean, Simplified Chinese, Traditional Chinese, and Italian. • Choose your language in the app — Settings ▸ Language lets you pick a language or follow your device's setting. The change applies the next time you open LocalEngine. • Fully translated, not just the labels — onboarding, model downloads, chat, projects, and error messages are all localized. Everything still runs 100% on-device — no account, no cloud, no telemetry. ### 0.4.20 — 2026-08-17 • New free LFM2.5 2.6B model — download Liquid AI's LFM2.5 2.6B Q4_K_M GGUF model for on-device text generation and tool use. • Native LFM prompting — when you select an LFM model, LocalEngine now automatically uses the model's built-in chat and tool-call template for more reliable responses. • Better tool calls — LFM's native tool-call output is recognized and passed into LocalEngine's on-device tool workflow. Everything still runs 100% on-device — no account, no cloud, no telemetry. ### 0.4.18 — 2026-08-12 • New free LFM2.5 2.6B model — download Liquid AI's LFM2.5 2.6B Q4_K_M GGUF model for on-device text generation and tool use. • Native LFM prompting — when you select an LFM model, LocalEngine now automatically uses the model's built-in chat and tool-call template for more reliable responses. • Better tool calls — LFM's native tool-call output is recognized and passed into LocalEngine's on-device tool workflow. Everything still runs 100% on-device — no account, no cloud, no telemetry. ### 0.4.16 — 2026-07-30 Local embeddings — select a dedicated GGUF embedding model independently from your chat model, ready for private semantic search and retrieval. • New embedding models — download all-MiniLM-L6-v2, BGE Small EN v1.5, or Qwen3 Embedding 0.6B directly on iPhone and iPad. • Better multilingual retrieval — Qwen3 Embedding 0.6B is recommended for Chinese and other multilingual content. • Clearer model management — chat and embedding models are now shown separately, so choosing embeddings never interrupts an active chat model. Everything still runs 100% on-device — no account, no cloud, no telemetry. ### 0.4.15 — 2026-07-23 • Projects & chat history — a new Projects tab organizes your conversations into projects. Browse, search, rename, and reopen past chats anytime. • Collapsible projects — expand or collapse each project to keep long histories tidy. • Quick actions — swipe or long-press a chat to rename, clear, or delete it, and start a new chat or project right from the tab. • Polish — refreshed chat UI and assorted settings refinements. ## Apps similar to LocalEngine | App | Rating | Price | Category | | --- | --- | --- | --- | | [TLDR: Text & Article Summary](https://appshunter.io/ios/app/tldr-text-and-article-summary/id6749890121) | — | Free | Productivity | | [Locally AI by LM Studio](https://appshunter.io/ios/app/locally-ai-by-lm-studio/id6741426692) | 4.7 (1,486) | Free | Productivity | | [ChatLLM: AI Chat, Bot & Agent](https://appshunter.io/ios/app/chatllm-ai-chat-bot-and-agent/id6502844681) | 4.8 (3,140) | Free | Productivity | | [Random Notification](https://appshunter.io/ios/app/random-notification/id1469763117) | 4.8 (71) | Free | Productivity | | [Immerse: Pomodoro Focus Timer](https://appshunter.io/ios/app/immerse-pomodoro-focus-timer/id6782882276) | — | Free | Productivity | | [Calendar Schedule](https://appshunter.io/ios/app/calendar-schedule/id1492905050) | — | Free | Productivity | ## More apps by GUOYU WANG - [PrivyMermaid: AI Diagram](https://appshunter.io/ios/app/privymermaid-ai-diagram/id6758518978) - [FlightLedger](https://appshunter.io/ios/app/flightledger/id6758533176) - [PrivyPDF: PDF Agent](https://appshunter.io/ios/app/privypdf-pdf-agent/id6758668283) - [PrivyFeed: News Butler](https://appshunter.io/ios/app/privyfeed-news-butler/id6758854675) - [PrivyMermaid Pro: AI Diagram](https://appshunter.io/ios/app/privymermaid-pro-ai-diagram/id6759026916) - [Tenmo](https://appshunter.io/ios/app/tenmo/id6759307802) All apps by GUOYU WANG: https://appshunter.io/developer/1873302677 ## Related topics [think tank](https://appshunter.io/ios/topics/think-tank) · [liquid apollo](https://appshunter.io/ios/topics/liquid-apollo) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*