Grok BotLife adminHealthAI score · 71/100AI-assisted edit · no obvious prompt-injection riskX

Build a Replacement Timer with Grok Bot Mid-Workout

Free timer suddenly starts charging → describe needs to Grok Bot and iterate → get a working replacement on the fly

BeginnerStepsTip
Who
Users whose free timer app suddenly switched to paid
You get
Generate a functional replacement timer during an active workout
You need
Grok Bot

Constraints

Open Grok Bot (via X/Twitter DM or the @bot entry point) and describe in plain language that you need a replacement timer, including the features and interaction style you prefer from the original app. After receiving the first version, send 1–2 follow-up prompts based on actual use to refine it.

What they did

Author Jefflau discovered during a workout that his previously free timer had started charging. While continuing to exercise, he asked Grok Bot (@bot) to build a replacement. By the time he needed the timer, Grok Bot had already finished the first version. After two more prompts for refinement, the generated timer was virtually indistinguishable from the app he had used for months.

How it went

The author reported this was the first time he had AI generate a solution on the fly to a real-time problem. The first version was ready when needed, and after two rounds of optimization it was 'virtually indistinguishable from the app I've been using for months' (author report, not independently tested by this site).

Worth knowing

The original prompt text was not provided in the source, so verbatim reproduction is not possible. The exact output format (web page, script, or app) was not specified. The author attached 3 screenshots, but their content was not available as OCR in the snapshot. Grok Bot response quality and speed may vary depending on account access, model version, or feature updates.

Steps

  1. Describe the need and generate the first version

    Tell Grok Bot you are in the middle of a workout and your previously free timer has started charging. Describe the core features you need (e.g., interval timing, set counting, audio cues). Grok Bot will produce a first version that you can run or follow (possibly a web page, script, or step-by-step instructions).

  2. Test and iterate

    Try the first version during your workout. Send 1–2 follow-up prompts to Grok Bot based on real use, such as adjusting timing precision, layout, alert sounds, or adding features you are used to. The author reported that after 2 prompts, the result was virtually indistinguishable from the app he had used for months.

Prompt you can copy

Reference prompt · Editorial suggestion。Confirm the destination, input variables and output format before use.

This block is the prompt. Ads are never placed here.

No prompt needed — just follow the steps.

Use plain language to tell Grok Bot what timer features you need; no fixed prompt template is required.

Source

健身中途免费计时器开始收费：边练边让 Grok Bot 现做替代计时器，两轮提示后几乎一样 · Jefflau · X · 2026-10-27T06:26:08.000Z

Comments & feedback

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