NativeX — On-Device AI Lab

About this app

<p>NativeX is a visual playground for Apple's on-device intelligence — build prompt pipelines as a graph of cards, wire them together with variables, and run them right on your iPhone. Built for iOS engineers, prompt engineers, and the AI-curious: if you want to know<br />
what Apple's on-device model can actually do, this is the fastest way to find out.</p>
<p>FREE AND PRIVATE<br />
Every run executes on the Apple foundation model that ships with your device. No account, no API key, no server: prompts, photos, and recordings never leave your iPhone, and inference costs nothing.</p>
<p>LEARN THE REAL API<br />
Every card mirrors one Apple framework call and names the exact Swift symbol — LanguageModelSession, NLTokenizer, RecognizeTextRequest, SpeechTranscriber, etc. Configure it in the inspector, run it, read the output. What you learn transfers line-for-line to Xcode.</p>
<p>BUILD PROMPT PIPELINES<br />
• Prompt groups assemble instructions, few-shot examples, history, and the curreturn into a single transcript<br />
• Guided generation: constrain output to JSON with registered schemas, or design your own schema on the fly — no rebuild<br />
• 17 native ops: tokenize, detect language, named entities, sentiment, OCR a photo, read a barcode, transcribe speech, speak text aloud, regex, JSON extraction, and more. Wait for more!<br />
• Human-in-the-loop pauses: type or dictate an answer mid-run</p>
<p>EVALUATE LIKE A PRO — LLM OPS, ON-DEVICE<br />
NativeX brings the modern LLM-ops workflow — observability, datasets, evaluations — to the model in your pocket:<br />
• Run History logs every execution as a step-level trace — assembled prompt, output, timing, token estimates<br />
• Datasets batch-run a graph over a table of records, sequential or parallel<br />
• LLM-as-judge scoring runs on-device too<br />
• Re-run, reproduce, and compare past runs</p>
<p>REQUIREMENTS<br />
NativeX runs the Apple Intelligence on-device model. That requires an iPhone 15 Pro or newer (A17 Pro chip or later) on iOS 26 or later, with Apple Intelligence enabled in Settings.</p>