Build a custom workout app for a partner with Claude Code and Cursor

Custom workout Start screen from @RubeBuilds's post

@RubeBuilds's wife liked the Strong app but wanted different features plus routines pulled from Reddit. @RubeBuilds built their wife a workout app with Claude Code, plus some Cursor and Codex. The author says their wife uses it every session; screenshot of the Start workout templates (Day A/B/C) is in the post.

Try it yourself

What you get

A personal workout app with the templates and Reddit-sourced routines you approve, used in real sessions.

Tools

Time / cost: Not stated; the author says their wife uses it every session

Steps

  1. Write the feature gap versus the current app.
  2. Scaffold start/history/exercises first.
  3. Curate any imported routines before they appear as templates.
  4. Have the real user run a week of sessions and note friction.

Copy-ready prompt

Build a simple workout app for [NAME] who currently uses Strong but wants [FEATURES] and templates inspired by these Reddit routines: [LINKS]. Include Start workout, templates, history and exercises. Keep it offline-friendly. Do not invent medical advice.

Prompt written by AgentPlays, based on @RubeBuilds’s post. Check the output yourself and approve before anything is sent or bought.

Watch out: Not medical advice. Curate imported workout content yourself.

Proof / source

Self-reported Author's public X post with app screenshot (Oct 12, 2026). Self-reported.

In their words

Example: my wife loves the Strong app but wanted different features, plus workout routines pulled straight from Reddit. So I built her one with Claude Code, plus a bit of Cursor and Codex. She uses it every session.

— @RubeBuilds on X

Read the original source ↗

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