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About 3sparks
What is 3sparks?
3sparks Chat is a mobile AI workspace for iOS, iPadOS, and VisionOS that lets you chat with AI models wherever they run. You can download and use private on-device GGUF models directly on your iPhone, connect to LM Studio or Ollama servers on your Mac/PC/Linux, or tap into OpenAI-compatible cloud APIs such as OpenAI, Mistral, OpenRouter, and Gemini. It also includes an AI Keyboard extension that works across apps like Messages, Mail, and Notes.
Problem it solves
Most AI chat apps require you to send everything to the cloud, raising privacy and latency concerns. 3sparks solves this by giving you the choice to run models locally on your device or via your own local servers, keeping sensitive chats private. It also provides a consistent interface whether you're using free local models or paid cloud APIs.
Who it's for
3sparks is ideal for privacy-conscious individuals, developers, and writers who want to use AI on the go without being locked into a single provider. It's great for those who already use LM Studio or Ollama at home and want mobile access. It may not be the best fit if you require a web-based or Android solution, as the app is Apple-only.
Real use cases
- Chatting with a private local model on the train, with no internet connection.
- Using the AI Keyboard to rewrite or summarize emails in Mail without switching apps.
- Connecting to your home LM Studio server to continue a conversation started on your computer.
- Analyzing images with vision-capable models, either local or remote.
Key features
- On-device GGUF models — Download and run private local models directly on your iPhone without a separate server.
- Vision support — Chat with images using vision-capable local GGUF models or cloud providers that accept image input.
- Private memory — Let chats recall useful context from past conversations and saved documents on your device.
- LM Studio and Ollama integration — Connect to your own local servers or any OpenAI-compatible endpoint.
- AI Keyboard extension — Rewrite, summarize, translate, and run saved prompts from any app without leaving your keyboard.
- File and document handling — Bring PDFs, documents, and images into chats for richer answers.
- Model catalog and downloads — Browse supported Hugging Face GGUF models, filter, and download in the background.
SaaSpartout Score
7.4
/10
Editorial score from our review methodology — not user ratings.
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3sparks Pricing
3sparks pricing: Free to download; costs vary by cloud API usage. Billing model: Free.
For comparison: the median starting price in AI Other is $19/month, measured across 206 tools we track. See the full SaaS Pricing Index →
Free tier
3sparks Chat is available as a free download from the App Store. You can use on-device GGUF models at no cost, and connect to your own local servers (LM Studio, Ollama) for free (subject to your server's resources).
Cloud API usage
If you choose to use cloud providers like OpenAI, Mistral, OpenRouter, or Gemini, you'll be charged according to each provider's pricing. There is no middleman markup; you pay the provider directly.
In-app purchases (if any)
The scraped context does not specify any paid plans or subscriptions. Pricing is likely free for core local functionality, with optional cloud APIs billed by the provider.
Frequently asked questions
Is 3sparks free?
3sparks Chat is free to download. Using on-device GGUF models and local servers (LM Studio, Ollama) is free. If you connect to cloud APIs like OpenAI or Mistral, you pay those providers' standard usage fees.
How much does 3sparks cost?
The app itself is free. There is no monthly subscription required for local or server-based AI. Azure cloud API costs vary depending on the provider and models you choose.
Who is 3sparks best for?
It's best for Apple users (iPhone, iPad, VisionOS) who want private AI chat, especially those already using local servers like Ollama or LM Studio. It's also great for writers and professionals who need quick rewriting or summarizing via the AI keyboard.
What are the top alternatives to 3sparks?
Alternatives include other mobile AI apps such as ChatGPT, Perplexity, and LocalAI clients. For local model support, you might also consider apps like Enchanted (for Ollama) or App Intents-based tools. However, 3sparks stands out for its keyboard extension and multi-provider flexibility.
Does 3sparks require an internet connection?
No. With on-device GGUF models, you can chat entirely offline. Cloud APIs and remote servers obviously require internet.
What are 3sparks key limitations?
3sparks is iOS/iPadOS-only, so no Android or web versions. It lacks a built-in vision model for local files unless you pair with a vision-capable cloud provider or GGUF model. Also, the free tier does not include any cloud provider credits.
