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
Lifting Tempo
Master Every Phase of Your Lift
$2.99 · In-app purchases
PRICE
$2.99
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 Lifting Tempo: map the core Sports 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
Encourage user feedback and display ratings prominently.
Assumption to check: Lack of user reviews makes it hard to gauge effectiveness.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a feature for users to create and share custom workouts.
Assumption to check: Limited workout variety may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 3
Create a more discreet subscription model with clear value propositions.
Assumption to check: In-app purchase prompts can disrupt user experience.
Validate with people who use this workflow before building.
Hypothesis 4
Add social sharing options and community challenges.
Assumption to check: No social features for community engagement.
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
Master Every Phase of Your Lift Lifting Tempo is the ultimate tool for athletes, bodybuilders, and powerlifters who are serious about Time Under Tension (TUT). Stop guessing your speed and start training with precision. Whether you are focusing on a slow eccentric for hypertrophy or explosive power output, Lifting Tempo keeps you honest with precise audio, visual, and haptic cues. KEY FEATURES: Fully Customizable Tempos Define the exact seconds for every part of the movement: Eccentric: Control the lowering phase. Bottom: Pause in the stretch position. Concentric: Explosive or controlled lifting. Top: Squeeze at the peak. Smart Audio & Haptics You don't need to look at your screen. Hybrid Audio: Hear distinct "ticks" for longer durations and a clear "3, 2, 1" voice countdown before the phase changes. Haptic Metronome: Feel the tempo on your wrist with Apple Watch or in your hand with iPhone. Standalone Apple Watch App Leave your phone in your gym bag. Create, edit, and delete plans directly on your wrist. Beautiful, high-contrast animations that are easy to see mid-set. Syncs your plans automatically between iPhone and Watch. Deadlift & Squat Modes Most timers assume you start at the top. We don't. Top Start: For Squats and Bench Press (starts with lowering). Bottom Start: For Deadlifts, Rows, and Pull-ups (starts with lifting). HealthKit Integration Your workouts count. Lifting Tempo saves sessions as "Functional Strength Training" to the Apple Health app, contributing to your Activity Rings and tracking heart rate and calories. Privacy Focused No accounts, no tracking, no ads. Your data stays on your device and syncs securely via your personal iCloud. Download Lifting Tempo today and make every second of every rep count.
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
React Navigation
@react-navigation/native
axios
Zustand
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.
