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
Sweatmates: Partner Fitness
Sweatmates is a simple accountability app for people who want to stay consistent with working out.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
10,743 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.
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What's included20 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 Sweatmates: Partner Fitness: 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
Implement advanced filters and matching algorithms to improve partner search.
Assumption to check: Difficulty in finding the right workout partner based on fitness level and location
Validate with people who use this workflow before building.
Hypothesis 2
Include more comprehensive tracking features, such as integration with wearables.
Assumption to check: Limited tracking of workouts and activities
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the paywall and provide clearer benefits of premium features.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Add social elements like group challenges or community forums.
Assumption to check: Lack of 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
Sweatmates is a simple accountability app for people who want to stay consistent with working out. Instead of tracking stats or metrics, Sweatmates focuses on showing up together. How it works Set a weekly goal Choose how many days you want to work out each week. Log workouts with a photo Use SweatCam to take a quick photo when you work out. Your partner sees it instantly. Stay accountable as a team See each other’s progress throughout the week and stay motivated to hit your goal. Add light stakes If you miss your weekly goal, you owe a simple wager like buying dinner or doing a chore. Hit your goal and you are safe. Build consistency over time Sweatmates helps turn workouts into a shared habit instead of a solo chore. Why our users love Sweatmates Builds accountability without pressure Makes workouts feel shared even when apart Simple and fast with no stats or tracking required Designed for real life not perfection Whether you are just getting started or trying to stay consistent, Sweatmates helps you show up together. Sweamates has paid functionality. *WORKOUT LOGGING REQUIRES A SUBSCRIPTION Terms & Services: https://sweatmates.app/terms Privacy policy: https://sweatmates.app/privacy
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
Supabase
Zustand
react-native-gesture-handler
react-native-reanimated
BUILD KIT DIFFICULTY
Advanced
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.
