App Overview

The Stack System icon

The Stack System

The Stack System, LP · Health & Fitness

The Award-Winning App for golf enthusiasts is now even better

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.9
6,255 ratings · Top 5%

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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Build Kit

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

First kit free with a verified email

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Combine features and design from your favorite apps.

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What's included18 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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Free quick prompt For a smaller starting point

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 The Stack System: 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

Include more exercises and routines.

Assumption to check: Limited workout variety

Validate with people who use this workflow before building.

Hypothesis 2

Add social challenges or community sharing.

Assumption to check: No social features

Validate with people who use this workflow before building.

Hypothesis 3

Enhance nutrition tracking with barcode scanning.

Assumption to check: Basic nutrition tracking

Validate with people who use this workflow before building.

Hypothesis 4

Implement personalized workout plans based on user goals.

Assumption to check: Lack of personalized plans

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

The Award-Winning App for golf enthusiasts is now even better. Stack your most important golf skills and enjoy longer drives, closer wedges, and fewer putts. TheStack App has 3 main modes: Speed Training, Wedging, and Putting. STACK SPEED TRAINING ($99/year) powers distance gains through customized, variable inertia speed training - the most efficient way for a golfer to increase their clubhead speed. Includes full access to all app features: Stack Putting, Wedging, and the Learning Library. TheStack hardware is required. STACK WEDGING (30-day free trial, $59/year) delivers a science-based approach to improving your distance control from 140 yards and in. Practice sessions automatically adapt to your skill level for maximum effectiveness. The Stack Radar is required for this feature. STACK PUTTING (30-day free trial, $59/year) is like having a Tour putting coach in your pocket. Gamified sessions and deep analytics help you make more putts. **STACK WEDGING OVERVIEW** Stack Wedging uses a science-based approach to sharpen distance control from 140 yards and in. After a Baseline session, the app creates personalized, gamified practice. In Premier Mode, the App calls out distances and scores you in real-time using our proprietary scoring system based on Strokes Gained data. See how your wedges Stack up with 35 increasingly difficult challenge levels and dozens of valuable insights to help you start wedging it closer. Creative Mode lets you design your own wedge combines, customize clubs, targets, rounds, and challenge friends in real-time with the Compete feature. **STACK PUTTING OVERVIEW** Stop wasting time on the putting green. With focused 15-minute putting sessions, Premier Mode guides you through 18 realistic holes. Enter data easily via Voice or Pocket Mode. Track performance with spider charts, shot plots, and bar graphs. Compare against peers by handicap and get insights into your putting strengths and weaknesses. Creative Mode lets you build your own putting combines or choose from popular presets. Ideal for indoor greens or focusing on specific putting skills. On Course Mode provides detailed putting analytics from real play. Record Aimpoint data and more with better granularity than ShotLink. **STACK SPEED TRAINING** Over 55,000 golfers of all skill levels and handicaps have enjoyed customized variable inertia speed training, which is the most efficient way for a golfer to increase their clubhead speed. Speed training algorithms power customized dynamic programming borne from years of research by leading sport scientist, Dr. Sasho MacKenzie. To being, you’ll need TheStack hardware and a compatible Speed Radar. Payment is charged to your iTunes Account after purchase or trial. Subscriptions auto-renew unless canceled at least 24 hours before renewal. Manage auto-renewal in Account Settings. Unused trial time is forfeited upon purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Written user reviews are not shown here. Check current App Store reviews >

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.

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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.