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
Stridekick Activity Challenges
Compete in free, fun activity challenges with your friends and family–no matter which fitness tracker they have
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
2,306 ratings · Top 30%
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 Stridekick Activity Challenges: 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 an easier friend search and invite system.
Assumption to check: Users find it hard to connect with friends.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to create custom challenges.
Assumption to check: Limited challenge options available.
Validate with people who use this workflow before building.
Hypothesis 3
Add push notifications for challenge updates.
Assumption to check: Lack of engagement reminders.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer messaging around premium features.
Assumption to check: In-app purchases can confuse users.
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
Compete in free, fun activity challenges with your friends and family–no matter which fitness tracker they have. Sign-up for free, connect a wearable device or smartphone and get moving with others. CONNECT A VARIETY OF WEARABLE DEVICES Stridekick connects to a variety fitness trackers so you can compete with your friends no matter which device they use. Don’t have a fitness tracker? No problem. Connect using your smartphone or enter your activity manually. We connect with the following devices: Fitbit, Apple Watch, Garmin, Withings, Misfit, iPhone 5S+, Apple Health, Polar, and Xiaomi. CREATE YOUR OWN ACTIVITY CHALLENGES Choose from three challenge modes: Leaderboard, Streak, and Target. JOIN COMMUNITY ACTIVITY CHALLENGES Join bigger community challenges with other steppers on the Stridekick platform. Community challenges feature different modes of competition including Journey, Stick to it!, Teams, and even a collective Group Target! We're always adding new community challenges, so check back often. A SOCIAL COMMUNITY TO KEEP YOU MOVING Everything is more fun with others. Stay motivated with the community of Stridekick steppers. Add friends and follow each other's activity stats. Keep up with those you know best through our daily Friends Leaderboard. A VARIETY OF CHALLENGE GOALS, UNLIMITED FUN Our challenge types offer a variety of ways to compete. Whether you're seeking a highly competitive leaderboard, a daily activity goal, or a long-term step target, we’ve got you covered. Compete on steps or active minutes. TRACK YOUR PROGRESS OVER TIME View your weekly, monthly and yearly averages for steps, distance and active minutes. Keep track of your all-time best days and work to beat your personal records. Unlock activity levels as you increase your weekly activity average. Join for free to create challenges that - Last up to 7 days - Can include up to 10 people per challenge - Are public for anyone to join Upgrade your experience with a Pro subscription that includes - Longer challenges, up to 45 days - Higher participant limits - Private challenges for just your group - Priority support Terms of use: https://stridekick.com/terms-of-service
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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
Expert
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.
