OfflineGPT
Private, on-device AI—chat, image generation, voice, and tools for Android (Google Play).
Offline-first with optional cloud features (your API keys, optional web search). No ads. Billing via Google Play.
iPhone or iPad? Offline AI Studio — separate product page & App Store listing.
ChatGPT offline, OpenAI Alternative, offline AI, on-device LLM, Stable Diffusion mobile, Whisper offline, private AI, CodeAlp OfflineGPT
Built for Android
MNN image pipelines, Play Billing, and tool limits tuned for this build.
- Android 8.0+ (API 26+), 64-bit ARM
- Image generation: MNN diffusion (AbsoluteReality, Anything V5)
- Google Play Billing for Pro (one-time)
What OfflineGPT can do
On-device first—with honest optional online modes
Offline-first AI
Core chat, tools, and voice run on-device after you download models. Optional API mode and web search only when you turn them on.
Privacy-minded
Local chats and generations stay on your phone by default. If you use cloud providers or web search, data goes to those services under your control—not through a CodeAlp chat backend for those flows.
Whisper voice input
Dictate prompts with on-device speech-to-text. Many languages; download size depends on the voice model you install.
On-device image generation
MNN-based diffusion (AbsoluteReality, Anything V5)—tuned for Android performance and battery.
AI tools & CodeLab
Summarize, tone, grammar, posts, CodeLab, and more. Free vs Pro varies by tool—see the table below.
Thinking models
Qwen3 thinking variants and SmolLM3 can show step-by-step reasoning when you pick a compatible model.
Themes & languages
9 free + 7 Pro themes. UI in multiple languages—see the in-app list.
Custom GGUF imports
Bring compatible GGUF chat models. Pro unlocks managing many imports; free keeps one catalog model plus one custom import (replace rules in Model Manager).
How it works
Four steps
Install from Google Play
OfflineGPT targets Android 8.0+ on 64-bit ARM (arm64-v8a).
Download models
Chat, image, and voice assets—sizes from under 1 GB to several GB per model.
Chat locally
Run prompts on-device. Enable API providers or web search only if you want cloud-backed features.
Go Pro if you like
One-time Play purchase unlocks full model slots, premium themes, longer context, and Pro-gated tools.
Why OfflineGPT
Most AI apps default to the cloud. OfflineGPT defaults to your device—and stays honest when you opt in to the network.
Your keys, your device, your choice of models.
AI tools (Android)
Free vs Pro follows the current app build. Document, Email, Brainstorm, and custom tools are Pro-gated on Android.
| Tool | Access |
|---|---|
| Summarize | Free |
| Tone | Free |
| Grammar | Free |
| Explain | Free |
| Post / social | Free |
| CodeLab | Free |
| Document & OCR | Pro |
| Email writer | Pro |
| Brainstorm | Pro |
| Custom tools (create / manage) | Pro |
On-device models (catalog)
Approximate download sizes. Rocket-3B is Android-only in this lineup.
Chat models
LFM2.5 1.2B
LiquidAI
Llama-3.2-1B
Meta
Gemma-2B
Qwen2.5-3B
Alibaba
Rocket-3B
Community
Thinking models
Qwen3 0.6B Thinking
Alibaba
SmolLM3-3B
Hugging Face / ggml-org
Qwen3 1.7B Thinking
Alibaba
Qwen3 4B Thinking
Alibaba
Image generation (MNN)
AbsoluteReality
Photorealistic (MNN)
Anything V5
Anime-style (MNN)
Voice
Whisper (voice input)
OpenAI Whisper weights
Pro: import additional GGUF chat models from compatible sources (subject to RAM and validation).
Free vs Pro (Android)
Current Google Play build
| Feature | Free | Pro |
|---|---|---|
| On-device text/chat models | 1 catalog model (replace to switch) + 1 custom GGUF import | Install and switch between many models from the manager |
| On-device image models at once | 1 (replace to switch) | Unlimited installed |
| Local chat context (typical max) | Up to 2,048 tokens | Up to 32,768 tokens (local); API limits follow provider |
| System prompt editing | Presets visible; editing Pro | Full edit + custom saved prompts |
| User prompt templates | Max. 5 custom | Unlimited |
| Premium themes | 7 Pro-only themes locked | Every theme |
| Cloud API providers & web search | Pro only | Add keys for OpenAI, Gemini, Groq, etc.; optional web search when enabled |
| Ads | None | None |
| Purchase type | — | One-time Pro (no subscription) |
One-time Pro purchase on Google Play—price shown in the store.
Frequently asked questions
Do I need the internet?
You need a connection to download models and app updates. After that, core on-device features work offline. Optional API mode and web search need internet when you use them.
Is OfflineGPT free?
Yes. Free tier includes on-device use with limited model slots and tool locks—see the tables. Pro is a one-time Google Play purchase.
Is there an iPhone or iPad version?
Yes. On the App Store the app is listed as Offline AI Studio—the same product philosophy, built for iOS with Core ML. See the dedicated page. Offline AI Studio product page.
Which chat models are available?
GGUF catalog (LFM2.5, Llama 3.2, Gemma 2B, Qwen2.5-3B, Rocket-3B, Qwen3 thinking family, SmolLM3). Exact filenames match the in-app downloader.
How does voice input work?
Download Whisper assets, grant microphone access, then dictate. Audio is processed for transcription; default stays on-device unless you route through a cloud provider.
What are the AI tools?
Shortcut flows for summarize, grammar, tone, posts, code help, documents, and more. Document, Email, Brainstorm, and custom tool authoring follow the Free/Pro table.
How does privacy work?
Default local use keeps prompts and history on your device. Full details:codealp.ch/privacy-offlinegpt.
What devices are supported?
Android 8.0+ on 64-bit ARM (arm64-v8a). Pick models that fit your RAM.