Local LLM: On-Device

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Productivity • Developer Tools

How to Join Local LLM: On-Device Beta on iOS

Step-by-Step Installation Guide for iOS:

Get Apple TestFlight: Download the official, free TestFlight app from the App Store on your iPhone. TestFlight is Apple's official platform for distributing pre-release software securely. Make sure your device is updated to modern system software (iOS 27+, iPadOS 27+, macOS 27+, watchOS 27+, or visionOS 27+).
Tap "Join Beta" on CodeWing: Return to this page and tap the Join Beta button above. Safari will trigger the official TestFlight invitation link. If prompted with "Open in TestFlight?", tap Open.
Accept Developer Invitation: TestFlight will launch and display the latest build notes and tester information for Local LLM: On-Device. Tap Accept to register your Apple Account into the beta testing group.
Install & Start Testing: Tap Install (or Update) to download the build directly to your device. You'll receive instant notifications inside TestFlight whenever DEPLOY FORWARD LLC pushes new builds, bug fixes, or feature updates.

Essential Beta Testing Tips:

Apple 10,000 Tester Cap: Apple limits public TestFlight groups to 10,000 active users. If slots are currently full, tap Get Slot Alerts above to be notified the second a slot opens.
100% Free Sandbox Purchases: In-app purchases, subscriptions, and pro features in TestFlight are simulated in Apple's sandbox environment at $0.00 — your Apple Account is never billed.
90-Day Build Lifespan: Each build expires after 90 days. Developers periodically push updates that reset the countdown, and your personal app data is preserved.
Revert to App Store Anytime: You can switch back to the public release at any time by redownloading Local LLM: On-Device directly from the regular App Store.

About Local LLM: On-Device

MITHRIL is a private AI assistant that runs on your iPhone and iPad. Your conversations are processed on the device and saved on the device. No account, no cloud, no tracking.

TWO KINDS OF MODELS

Apple's on-device model, built into iOS 26 on devices with Apple Intelligence. Nothing to download.
Open models from Hugging Face in GGUF format, from companies like Alibaba, Google, Meta, Microsoft, Mistral, DeepSeek and Liquid AI. Browse by company, see whether a model fits your device's memory before you download it, and switch any time.

AN ASSISTANT THAT CAN DO THINGS

It knows today's date, the time and your city from your device, and asks before it acts. Texts and emails open as drafts for you to review and send. Choose which abilities it can use:

Reminders and calendar events
Texts, email and phone calls
Look up your contacts
Directions and places nearby
Run your Shortcuts
Web search: Wikipedia, DuckDuckGo, or Brave with your own key
Search your own documents
Today's date and exact math

PRIVACY YOU CAN SEE

The Privacy map shows what runs on your device, what goes online, and exactly what is sent. A web search sends only the search words, never your conversation, and your location is only turned into a city name. A live list shows every network request MITHRIL makes.

VOICE

Dictate with Apple's speech recognition, or download NVIDIA Parakeet for more accurate on-device transcription. Hear answers in natural voices generated on the device. The floating assistant stays with you in Picture in Picture while you use other apps.

FOR THE CURIOUS

Tap the speed line under an answer for a live engine dashboard: tokens per second, time to first token, context use, cache hits and memory.

REQUIREMENTS

iOS 26. Apple's on-device model needs a device with Apple Intelligence. Open models run on any supported iPhone or iPad. Larger models need more memory, and MITHRIL shows what fits before you download.

Models are made by their publishers and downloaded from Hugging Face. MITHRIL doesn't train or host models.

DeveloperDEPLOY FORWARD LLC

PriceFree

Release Date08/30/2026

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Frequently Asked Questions

How do I join the Local LLM: On-Device TestFlight beta on iOS?

First, download Apple's official TestFlight app from the App Store on your iPhone. Then return to this page and tap the "Join Beta" button above. Your device will automatically open TestFlight and prompt you to accept the developer's beta invitation. Tap "Accept" and then "Install" to start testing Local LLM: On-Device. If it says "This beta is full", tap "Get Slot Alerts" to be notified instantly when a slot opens.

Is testing Local LLM: On-Device on TestFlight safe and free?

Yes, testing Local LLM: On-Device is 100% safe and free. Every public TestFlight build must strictly follow Apple's App Review Guidelines and passes Apple's automated and manual security checks before public invitation links can be distributed. All betas operate within Apple's secure operating system sandbox and cannot access your device data without explicit permission. The beta is developed and maintained by DEPLOY FORWARD LLC.

Do in-app purchases or subscriptions cost real money during TestFlight beta testing?

No. In TestFlight, Apple connects all transactions to its free Sandbox environment. Any in-app purchase, pro feature tier, or subscription inside Local LLM: On-Device will display "[Environment: Sandbox]" and costs $0.00. Your Apple Account or credit card will never be billed for purchases made within a TestFlight beta build.

Does Local LLM: On-Device work on iOS 27 and the latest iPhone models?

Yes, Local LLM: On-Device is fully compatible with iOS 27 and iOS 26 across modern iPhones, including iPhone 18, 17, 16, 15, and 14 series. It supports modern iOS 27 capabilities including Siri AI, Dynamic Island, Lock Screen widgets, StandBy mode, and Apple Intelligence where applicable.

What should I do if the Local LLM: On-Device TestFlight beta says "This beta is full"?

Apple enforces a strict cap of 10,000 public testers per TestFlight app. Popular betas fill up quickly, but spots reopen regularly because Apple automatically purges inactive testers, and DEPLOY FORWARD LLC frequently clears inactive seats before dropping new beta builds. Tap the "Get Slot Alerts" button on this page to receive instant Email and Telegram alerts from CodeWing the moment an open slot is detected. You can also discover trending alternatives in the Productivity category.

Will installing the beta replace my current App Store version of Local LLM: On-Device, and will I lose my data?

Installing the TestFlight beta will replace the App Store version on your iPhone, but all your local app data, documents, logins, and configurations are safely preserved. If you ever want to switch back to the stable public release, you can simply redownload Local LLM: On-Device directly from the App Store at any time without losing your data.

How long does a TestFlight beta build last before it expires?

Each TestFlight build has a maximum lifespan of 90 days from the day the developer uploaded it to Apple. You can see the countdown days directly beneath Local LLM: On-Device's title in your TestFlight app. Developers regularly release new builds with improvements, which automatically resets the 90-day timer so your testing is uninterrupted.

How do I send feedback or report bugs for Local LLM: On-Device?

You can send feedback directly to DEPLOY FORWARD LLC by taking a screenshot while using Local LLM: On-Device and tapping "Share Beta Feedback", or by opening TestFlight, tapping Local LLM: On-Device, and selecting "Send Beta Feedback". You can include notes, screenshots, and system logs to help the developer fix issues before the official App Store launch.

Local LLM: On-Device

How to Join Local LLM: On-Device Beta on iOS

About Local LLM: On-Device

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