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
One Diary!
"One Diary!" lets you record your day in the easiest way.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
2 ratings · Top 15%
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 One Diary!: map the core Lifestyle 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
Add features like mood tracking and reminders.
Assumption to check: Limited functionality compared to full-featured diary apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement themes and font options for user personalization.
Assumption to check: Lack of customization options for entries
Validate with people who use this workflow before building.
Hypothesis 3
Provide users with insights about their writing patterns.
Assumption to check: No analytics on 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
"One Diary!" lets you record your day in the easiest way. Are you busy with work or study every day? Do you have time to stop and review some of the beauty that happened today? Do you remember how you spent last year today? It's time to cultivate the habit of keeping a diary, record good things, and record a bit - in the simplest way. Write a daily diary, each diary is summarized with a picture and a few words. Writing a diary is no longer your burden. Open "One Diary!" every night, in the best way, let us help you form the habit! ---------- - One Diary currently has 5 beautiful diary format templates to choose from, so your diary is no longer monotonous. - One Diary does not only keep your diary locally, but also last time to the far end. Don't worry about your device being lost if you change your device. - Each journal can generate beautiful cards, save them to albums, or share them where you want to share. - You can set up a reminder to remind you to write a diary at a fixed time every day to develop a good habit of recording every day. - Are you worried about your diary when you use your phone? You can lock your diary and keep your privacy safe. - When editing a diary, you can selectively publish your diary and share your wonderful life with partners around the world. - Add friends and keep a journal with your partner. - Support PDF export diary, don't worry about the diary lost. --- Contact me --- If you have any questions, please contact us. Perhaps your suggestion will appear in future versions, let us make progress together! email : [email protected] QQ group : 686237990 WeChat: ganlan0415
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
TypeScript
Supabase
React Navigation
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.
