Alibaba · Most capable, best for complex tasks

Qwen 3 4B on iPhone

  • Most Capable
  • Tools
  • Reasoning

Qwen 3 4B is an open model from Alibaba that runs on your iPhone through MLX. It is the most capable model in the Priobs library and the app’s top pick for complex tasks. After the 2.3 GB download it works without an internet connection.

How to install it

Free download · iPhone, iOS 26.0 or later

Specifications

Company
Alibaba
Parameters
4B
Download size
2.3 GB
Minimum RAM
2.9 GB
Category
Most Capable
Tools
Tools
Reasoning
Yes, shows its thinking
License
Apache 2.0
Format
4-bit quantized, MLX

Numbers come straight from the model catalogue inside the app. Qwen 3 4B and its licence belong to Alibaba.

About Qwen 3 4B

What is Qwen 3 4B?

Qwen 3 4B is a 4-bit quantized MLX build of Alibaba’s model, packaged to run directly on Apple silicon instead of a remote server.

Qwen 3 4B is a reasoning model. It thinks before it answers, and Priobs shows that thinking in its own section above the reply, so you can follow how it got there.

What it is good at on iPhone

  • Complex, multi-step questions
  • Writing and coding help
  • Reliable tool use

Qwen 3 4B supports Priobs tools, so it can check your calendar, add reminders or read Health data when you turn those tools on.

Trade-off: it needs more memory and battery than the compact models, so it is slower on older iPhones.

Device fit

Qwen 3 4B needs at least 2.9 GB of memory. Priobs checks your iPhone, hides models it does not have the memory for, and warns you if a model is close to the limit and may be unstable.

Setup

How to get it in Priobs.

One download over Wi-Fi and you are offline-ready for good.

  1. Open Priobs and go to the Model Library.

  2. Find Qwen 3 4B and tap Download (2.3 GB).

  3. Select it as your active model. Chats now work offline.

FAQ

Qwen 3 4B, answered.

General Priobs questions

Does Qwen 3 4B work without internet?

Yes. Once downloaded, Qwen 3 4B answers on your iPhone and works in airplane mode. Optional features like web search need a connection when you turn them on.

How much memory does Qwen 3 4B need?

At least 2.9 GB. Priobs hides models your iPhone does not have the memory for and warns you about ones that may be unstable.

Does Qwen 3 4B support tools?

Yes. Qwen 3 4B can use Priobs tools like calendar, reminders and Health. Each tool stays off until you turn it on.

Does Qwen 3 4B send prompts to Alibaba?

No. Qwen 3 4B generates every answer on your iPhone. Your prompts never go to Alibaba or to us. Something leaves your phone only if you turn on an optional connected feature like web search, and Priobs asks first.

Other models

You can keep several installed at once.

Switching models takes one tap. A common setup: a small, fast model for quick questions and a bigger one for anything that needs more depth.

Compare every modelBest local LLMs for iPhone in 2026How to run an LLM on iPhone

Run Qwen 3 4B on your own iPhone.

Priobs is free to download with a free trial. Pick a model, and every answer is generated on your iPhone.

Free download · iPhone, iOS 26.0 or later · Cancel any time in App Store settings