Joel Farthing

Joel Farthing

Practical Tools for the Data-Driven
#95085882 followers8 following
#24,027Last month
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About

Building practical AI tools, Apple/watchOS apps, and models for local inference.

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Tastemaker
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Maker History

  • RHRSpark
    RHRSparkYour resting heart rate. Raw. Beautiful. On your wrist.
    Apr 2026
  • HRVSpark
    HRVSparkYour HRV. Raw. Beautiful. On your wrist.
    Mar 2026
    • 🎉
    Joined Product HuntMarch 3rd, 2026

Forums

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3h ago

Codex Process Jobs - Codex Plugin: Durable detached local process jobs for Codex

A free, open-source Codex plugin for long local builds, tests, benchmarks, inference runs, and repairs. CPJ detaches the process, releases the conversation, records bounded output, and returns completion to Codex for inspection.
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3mo ago

RHRSpark - Your resting heart rate. Raw. Beautiful. On your wrist.

RHRSpark is a transparent resting heart rate app for Apple Watch that displays sedentary HR and Apple's daily RHR as live sparkline complications. Ten watch face complications. No scores, no interpretation. $2.99 one-time Pro unlock. No subscription. From the maker of HRVSpark.
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5mo ago

HRVSpark - Your HRV. Raw. Beautiful. On your wrist.

The usual HRV app flow: data → algorithm → verdict → user. HRVSpark reverses it: data → user → intuition. Raw SDNN sparklines and gauges on your Apple Watch face, across four time windows. Complication-first — always visible, never buried in an app. Works alongside analysis suites like Athlytic or HRV4Training, or stands alone as your only HRV tool. $2.99 one-time. No subscription. No account.
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