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.
App Overview
Sheiko - Workout Routines
- OFFICIAL SHEIKO TRAINING APP
$19.99 · In-app purchases
PRICE
$19.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
147 ratings · Top 15%
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.
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What's included16 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.
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
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Sheiko - Workout Routines: 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 a broader range of exercises and custom routines
Assumption to check: Limited exercise variety in workout routines
Validate with people who use this workflow before building.
Hypothesis 2
Add social features to share routines and progress with friends
Assumption to check: Lack of social features for workout sharing
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with Apple Watch/Google Fit for real-time tracking
Assumption to check: No integration with wearables for tracking
Validate with people who use this workflow before building.
Hypothesis 4
Implement a free trial to attract more users
Assumption to check: High upfront price without trial
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
- OFFICIAL SHEIKO TRAINING APP Is this you? You know how to do a squat, bench, and deadlift, you have been lifting for at least 3 months and you want to get much, much stronger. If so, this app is for you. Simply the best strength training system in the world from the man responsible for more gold medals than anyone else around. Enough said. - HIGHLIGHTS * Bench Specialization programs (in-app purchases) * Bar Tracking and Analysis * 51 training cycles * Training programs for beginner, intermediate, and advanced levels * demonstration videos for the main and supplemental lifts * plenty of progress charts * easily customizable * intra-workout note taking * complete history view with export Sheiko also supports sharing workout data with the Apple Health app. The app includes 51 training cycles designed for all skill levels ranging from total beginners to advanced athletes. What's more, they are all completely flexible and easily modified for your own needs. Excel is nice but this is far easier. Confused about one of the exercises? Watch the video. Need more help? Come visit the forum. We've got you taken care of. Now let's get started!
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.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
Axios
Chart.js
Firebase
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.
