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
Pacer: Hourly Step Tracker
Most step counters tell you you're behind at 10pm
$3.99
PRICE
$3.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Pacer: Hourly Step Tracker: 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 gamification elements, like achievements and challenges.
Assumption to check: Users often find step tracking apps lack motivation features.
Validate with people who use this workflow before building.
Hypothesis 2
Offer comprehensive analytics and personalized recommendations.
Assumption to check: Many apps do not provide detailed insights into user activity.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a streamlined logging process with quick-add features.
Assumption to check: Users report difficulty in logging activities quickly.
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
Most step counters tell you you're behind at 10pm. Pacer tells you at 10am. Pacer spreads your daily step goal across your active hours and shows whether you're ahead or behind pace right now, on every glance. A 10,000-step goal isn't a midnight cliff. By 3pm you can know if you're on track. WHAT YOU GET • A live ahead/behind number on your wrist — "+420" or "-180", not a percentage. • Three watch-face complications: rectangular (steps + delta + pace bar), Pacer Steps (circular), and Pacer Delta (circular). • Custom active hours. Active from 10am? Winding down by 6pm? Set it once. • Gentle behind-pace nudges if you slip off pace PRIVACY Pacer collects nothing. HealthKit step counts stay on your watch — no servers, no accounts, no analytics, no third-party SDKs. DESIGNED FOR APPLE WATCH Built with SwiftUI and Swift 6 for smooth, battery-friendly performance. HOW IT WORKS Set a daily goal and an active window (default 9am–8pm). Every minute Pacer computes your on-pace target, a moving line from 0 at your start time to your goal at your end time. The delta between your actual steps and that target is your dashboard, your complication, your nudge. PERFECT FOR • Walkers who want nudges, not alarms • Shift workers with non-standard hours • Anyone trying to get their steps in for the day, every day
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
Victory Native
React Navigation
Zustand
Axios
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.
