Start with the assignment rules. Use AI only where your course permits it. This guide describes options and checks for study tasks. It makes no claim about which apps students use most.
We checked the linked vendor sources on October 14, 2026. This post reports no comparative product test.
Private LLM, Claude, ChatGPT, Copilot Chat, Duck.ai and Apple Writing Tools
1. Private LLM
The Private LLM developer site documents offline use on iPhone after a model download. Use only for tasks your course permits.
2. Claude
Claude requires phone verification for new accounts, according to its account verification guide. Check the service terms before account creation.
3. ChatGPT
The ChatGPT data controls guide explains how to exclude new chats from model training. Review the setting before use with study material.
4. Microsoft Copilot Chat
Microsoft lists Microsoft 365 A1, A3, and A5 among eligible subscriptions for Copilot Chat with a school account. Microsoft states that students aged 13 and older can use Copilot Chat. School administrators must take extra steps to enable it. See the eligibility guide.
Included web chat differs from work-based chat with a paid Copilot license. See the license guide. Ask the school administrator to confirm your access.
5. Duck.ai
The Duck.ai privacy policy describes requests to external model providers. Its default policy excludes model training on chats. Optional feedback and sync have separate data rules. Check the original sources for any answer you use.
6. 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.
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, Claude, ChatGPT, Copilot Chat, Duck.ai and Apple Writing Tools: study checks
| Option | Check before use |
|---|---|
| 1. Private LLM | Check course rules and the model. |
| 2. Claude | Check account and course requirements. |
| 3. ChatGPT | Check data controls. |
| 4. Microsoft Copilot Chat | Confirm the school license and access. |
| 5. Duck.ai | Verify the answer against course sources. |
| 6. Apple Intelligence Writing Tools | Check feature access and course rules. |
A proposed study workflow
- Ask the instructor which AI tasks the course permits.
- Use a public practice question for the initial app check.
- Verify the answer against course material.
- Record AI use as the course requires.
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.
LLMFarm source project availability
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.
Frequently asked questions
Which students can use Microsoft Copilot Chat?
Microsoft permits students aged 13 and older to use Copilot Chat with an eligible school account. School administrators must take extra steps to enable access. See the Microsoft eligibility guide.
Does Claude require phone verification for a new account?
Claude requires phone verification for new accounts. See its account verification guide.
Can Private LLM work offline on iPhone?
The Private LLM developer site documents offline use on iPhone after a model download.
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.