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 Counters
Tally Counters is a personal counter to let you easily track unlimited things in your life
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
2,876 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 included17 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 Counters: map the core Utilities 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
Allow users to customize counter appearance and settings more extensively
Assumption to check: Limited customization options for counters
Validate with people who use this workflow before building.
Hypothesis 2
Implement iCloud sync or export/import functionality
Assumption to check: No data backup options
Validate with people who use this workflow before building.
Hypothesis 3
Provide visual graphs/charts for counts over time
Assumption to check: Lack of detailed analytics on counts
Validate with people who use this workflow before building.
Hypothesis 4
Add easy sharing functionality via social media or messaging apps
Assumption to check: Limited sharing options for counts
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 Counters is a personal counter to let you easily track unlimited things in your life USE IT FOR EVERYTHING: • How many hours did i paid for? • How many cupcakes did i eat this month? • How many cigarettes did i have? • How many times did i hit the gym? • How many days left for my big event? • How many coins in my precious collection? • How many money do i have in my bank account? Anything else you can think of…. PRODUCTIVITY - Large buttons to increase and decrease counters - Set STEP UP, STEP DOWN and RESET values - Option to turn on/off sound effects - No limit to counter value INTUITIVE DESIGN • Tally Counters app was designed with simplicity and functionality • Stunning graphics make capturing values easy and awesome • Two amazing themes: dark and light • Set background image for each counter iCLOUD SYNC Sync your counters on all your devices, signed in with the same iCloud account, automatically. You don’t have to do any setup!!! RED BADGE ICON • Use the red badge icon of the app to show the value of a counter WIDGET ON TODAY OF NOTIFICATION CENTER • See your counters on notification center at a glance • Count up, down and reset • Navigate through your counters • Open the app from the widget SHARE • Share your counters from inside the app (mail, social networks, messages, copy to clipboard,…) • Create counter pics, set backgrounds, filters and share them on social networks: Instagram, Facebook, Twitter,… MORE FEATURES • Instant counter search • Sort your counters manually • Full landscape support • Ability to take screenshot of counters list • Auto-lock enable/disable • Master Reset Button: reset all counters at once LOVED BY USERS: ——————————————— Perfect!!! This app is perfect!! Simple, practical, elegant, and not needlessly complicated!! Blah2, 2014 A simple, east to use counter. Works flawlessly. If you're looking for a simple tool to count, this app works. Exactly what I wanted Tried many others. This has the best, most simple interface for my needs. Very straight forward tallying. Love it! Perfect! This was exactly what I was looking for - an app that let's you tick off numbers of things you need to do, but where the things themselves can't be differentiated, e.g. Papers you need to read, exercises you need to do. Thank you! Really useful app!!! It is very simple and easy to use. It's not like most other apps in which the apps are extremely complex and hard to use. I recommend this app for your counting jobs
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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
Starter
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.
