Offline AI writing apps for iPhone need a compatible model. This list separates app features from developer projects.
We checked the linked vendor sources on October 14, 2026. This post reports no comparative product test.
Compare Private LLM, Apple Writing Tools, MLC Chat and LLMFarm
- Use the same short document for each option.
- Check facts, tone, and the required format.
- Check export and offline access before you rely on the app.
PocketLLM is pre-launch. Private, on-device AI, starting on iPhone, with more platforms planned. No account required, no in-app tracking, and chat processing stays on your device. Join the waitlist.
Private LLM, Apple Writing Tools, MLC Chat and LLMFarm features
1. Private LLM
The Private LLM developer site documents offline use on iPhone after a model download. Check a sample draft with the model you select.
2. Apple Intelligence Writing Tools
Apple documents text edits and summaries in Writing Tools. Apple Intelligence can also use Private Cloud Compute. Check the exact feature offline on a supported device.
3. MLC Chat source build
The MLC iOS guide describes an Xcode source build with model libraries and model files. Treat this as a developer project.
4. LLMFarm source project
The LLMFarm repository states that the app is temporarily unavailable through TestFlight and the App Store. Treat the source project as a separate developer option.
Private LLM, Apple Writing Tools, MLC Chat and LLMFarm: offline checks
| Option | Check before use |
|---|---|
| 1. Private LLM | Check the model download and the draft. |
| 2. Apple Intelligence Writing Tools | Check device support and cloud use. |
| 3. MLC Chat source build | Check the build and model requirements. |
| 4. LLMFarm source project | Do not plan an App Store installation. |
Before a private draft
Local inference keeps prompts on the device during inference when the selected model runs there. For a local-only workflow, select no cloud model. Disable chat sync and cloud backup. Check the app telemetry policy. Disable optional network features. Review extensions, exports, and local storage access.
Frequently asked questions
What does Private LLM require for offline use?
The Private LLM developer site documents offline use on iPhone after a model download.
Can Apple Intelligence use a cloud service?
Apple Intelligence can use Private Cloud Compute. See the Apple privacy guide.
What does the MLC Chat source build require?
The MLC iOS guide describes an Xcode source build with model libraries and model files.
PocketLLM is pre-launch, with a waitlist for the iPhone launch. More platforms are planned. See the PocketLLM model catalog for its separate model list.