NativeX← One Jellie
The NativeX Playground home screen: a neon runner sprite over a halftone grid above a list of prompt graphs.

One Jellie · iOS + macOS

NativeX

The on-device Apple Intelligence playground.

nativex — zsh
❯ nativex is on-device, free, forever, available with native Swift APIs, for iOS AND macOS, offline, fully private, zero token cost

Author prompt graphs, wire them with {{var}}, and run Apple's foundation model right on your iPhone. No account, no API key, no server.

Download on the App StorePrivacy

Free on the App Store · Apple Intelligence devices

Watch a graph think.

This is what NativeX does, doing it. Each card is one real Apple API; the signal walks the wires, the output lands below — and every step is a reason this app exists.

receipt-ocr.graph
❯ run receipt-ocr.graph
[1/4] input receipt.jpg · 2.4 MB
[2/4] vision RecognizeTextRequest → 14 lines
[3/4] model LanguageModelSession · 41 tok
[4/4] output { total: "$23.40", date: "2026-07-07" }
✓ done · 86 ms · on-device · 0 network calls
  1. 01

    Graphs, not chat.

    Author prompt pipelines as visual node graphs — 11 node kinds, wired together with {{var}}. LLM-ops, not a chatbot.

  2. 02

    Every node is a real Apple API.

    RecognizeTextRequest is a look-up-able Swift symbol — 17 native ops from Vision, Speech, and Natural Language.

  3. 03

    There is no cloud.

    Apple's foundation model runs on your iPhone or Mac — offline, zero token cost, zero network calls. The privacy label reads: Data Not Collected.

  4. 04

    Trace every step. Judge every run.

    Step-level traces, batch datasets, and an on-device judge — the whole eval loop, closed on the phone.

The bench, in your pocket

The NativeX Playground canvas: node cards over a blueprint grid, wired with variable chips.
Wire nodes with {{var}}
A NativeX node inspector bottom sheet editing an Instruction block.
Tune any node in a sheet
A NativeX dataset of interview candidate records with a Run-over-graph button.
Batch-run a dataset
A NativeX run trace showing per-step input, output, and provenance.
Replay every step

Built for Apple Intelligence.

The hardware floor isn't a limitation — it's the product. NativeX drives the same on-device foundation model Apple Intelligence runs on, so the compatibility list is exactly Apple's:

iPhone
15 Pro or later
Mac
Apple silicon — M1 or later
OS
iOS 26 · macOS 26
Price
Free — no account, no API key

On any other device the app stays fully navigable and explains exactly why, with a re-check.

privacy: data not collected →