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
Tally: Everything Pickleball
Tally is the fastest, cleanest way to score and track pickleball.
$3.99 · In-app purchases
PRICE
$3.99
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Tally: Everything Pickleball: 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
Integrate social features to share scores and achievements.
Assumption to check: Lack of user engagement features like social sharing
Validate with people who use this workflow before building.
Hypothesis 2
Provide detailed performance analytics and insights.
Assumption to check: Limited analytics for players' performance
Validate with people who use this workflow before building.
Hypothesis 3
Simplify player management with search and filter options.
Assumption to check: Difficulties in managing player lists
Validate with people who use this workflow before building.
Hypothesis 4
Include onboarding tutorials to guide new users.
Assumption to check: No in-app tutorials or help
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
Tally is the fastest, cleanest way to score and track pickleball. Score singles or doubles in seconds. Get DUPR-ready stats, AI match insights, and a clean match history that's yours alone. Built for league nights, open play, and tournament practice — and yes, it works on Apple Watch too. PICKLEBALL, DONE PROPERLY • Singles and doubles, traditional and rally scoring • Full side-out logic, server rotation, and second-server tracking • Match formats: best-of-3 to 11, to 15, to 21, custom • Time-outs, medical time-outs, and side switches • Match recap with shot patterns, streaks, and pace DUPR-READY STATS Tally tracks the stats DUPR players actually care about: opponents, partners, score lines, win rate by side, and rally length. Export a clean match summary you can share with your league — or just keep your own quiet record. (DUPR is a registered rating system; Tally is an independent third-party scorekeeper.) AI MATCH INSIGHTS After each match, Tally surfaces the patterns you'd otherwise miss: serving streaks, scoring runs, momentum shifts, and head-to-head trends across opponents. The kind of post-match read a coach would give you, without needing one. ALSO ON APPLE WATCH If you wear Apple Watch, Tally extends to your wrist — tap to score, glance at the state of the match, and let your phone stay in your bag. Optional, not required. ALSO SUPPORTS Tally also supports tennis, padel, badminton, and table tennis with their own scoring engines — singles, doubles, deuce, ad/no-ad, and game-set-match. Your full racket-sport history, in one app. PRIVATE BY DEFAULT • On-device match storage • No login required to score • Optional iCloud sync • No ads, no tracking pixels PREMIUM UTILITY, NOT A SPORTS APP Tally is built for players who want their gear to disappear. Quiet typography, restrained color, instant haptics, and zero noise — so you can focus on the next point. Subscription: Tally Pro unlocks unlimited match history, advanced stats, and DUPR-ready exports. Free tier covers your last 5 matches forever. Privacy Policy: https://tally.fast/privacy-policy Terms of Use: https://tally.fast/terms
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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.
SUGGESTED BUILD STACK
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Expo
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.
