App Overview

Holter Buddy Plus icon

Holter Buddy Plus

Eamonn Alphin · Health & Fitness

Holter monitors are itchy, uncomfortable, clunky devices, but they're the best we have right now so we're stuck with them

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.7
6 ratings · Top 50%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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A product spec, screen plans, and build steps for your coding agent.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Holter Buddy Plus: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Incorporate more detailed analytics and insights.

Assumption to check: Limited features and data analysis compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Enhance UI with modern design elements and animations.

Assumption to check: User interface is not very engaging

Validate with people who use this workflow before building.

Hypothesis 3

Simplify subscription process and provide clear information.

Assumption to check: Subscription management can be confusing

Validate with people who use this workflow before building.

Hypothesis 4

Add social features for sharing experiences and tips.

Assumption to check: Lack of social features for community support

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Holter monitors are itchy, uncomfortable, clunky devices, but they're the best we have right now so we're stuck with them. Maybe Apple will find a way to shove one in a watch one day. While wearing a holter monitor may have to be uncomfortable, noting your cardiac events doesn't have to be! Holter Buddy Plus will let you keep track of your activities and symptoms while you're wearing your monitor at the push of a button or through Siri! With Holter Buddy Plus, you can set up a "Hey Siri" shortcut (press the Add to Siri button on the Profile Tab), making recording your cardiac events even easier!*** Give your holter tracker a name, note the ID of the device (if you know it), the time you started wearing the holter, the time it is due back, and hit "Save". Then, whenever you have a symptom, or just want to record an even of interest, press the big red button! You can set the time, type in what you were doing, and what symptoms you experienced. Don't forget to fill in you profile! Share as much or as little as you want and it will be printed with the lab report! To print the report, navigate to the Holter Tab, tap the row of your tracker, then press the "print" button on the history page! A nice little report containing all your cardiac events, including your name, phone number, health number, sex, and medications will be generated for printing, you can even save the report to PDF! This app is entirely stored on your device so no data is collected. ***You'll need to set the shortcuts activity and symptoms to "ask each time", the first time you set it up.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
Victory Native
React Navigation
Async Storage
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.