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
Jotting Journal
Most diary apps for kids ask for an account before your child writes a word
$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 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 Jotting Journal: map the core Productivity 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 a tagging system with search functionality.
Assumption to check: Users find it hard to organize entries efficiently.
Validate with people who use this workflow before building.
Hypothesis 2
Add calendar sync and reminders for entries.
Assumption to check: Lack of integrations with calendars or reminders.
Validate with people who use this workflow before building.
Hypothesis 3
Provide insights on writing frequency and trends.
Assumption to check: No analytics on journal entries or writing habits.
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
Most diary apps for kids ask for an account before your child writes a word. Jotting Journal doesn't. Set it up once, on the device, and it's done: no sign-up, no cloud sync, no subscription to manage. A private, offline diary with a notes section too. TWO WAYS TO WRITE Diary entries come with an optional mood and decorative stamp, for whatever happened that day. Notes are separate, for anything that isn't a dated entry. Both sort into custom categories, and the calendar pulls up any day at a glance. Five themes let your child make it feel like their own. ONE THING TO KNOW A PIN keeps the journal private inside the app. It does not encrypt the data stored on the device, so if someone has full access to the device's files, the PIN won't stop them. That's the same model most diary apps in this category use. Jotting Journal's real difference is what it doesn't ask for: no account, no cloud, no repeat billing. WHAT JOTTING JOURNAL DOES NOT DO Jotting Journal doesn't connect to the internet, show ads, or send data anywhere. There's no AI, no streak counter, and no reminders pushing your child to write. It's a one-time purchase, not a subscription.
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
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Zustand
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.
