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.
Capture the moments between tasks.
$2.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Interstitial Journal App: 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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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
Assumption to check: Users often find it hard to stay consistent with journaling.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in searching previous entries.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited customization options for entries.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of integrations with other apps.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Capture the moments between tasks. Interstitial Journal is a small, private notebook for the gaps in your day — before you start, when you switch, when you get stuck, when you finish. Type a line or speak it; it's timestamped automatically and it's entirely yours. THE IDEA The transitions between tasks are where focus leaks away. A quick note — what you just did, what's next, how you feel — helps you land in the next thing instead of carrying the last one with you. Interstitial Journal makes that note effortless. HOW IT WORKS - Open a blank note and write a line, or tap the keyboard mic and say it - Add a tag, and optionally how you're feeling - There's no Save button — it's kept the moment you're done - Your day reads back as a running timeline, newest first WHAT'S INSIDE - Type or speak (system dictation to text; no audio is stored) - Automatic timestamps on every entry - Editable tags — five to start (Work, Personal, Idea, Mood, Health); rename, recolor, reorder, or add your own - Start a task to see it live on your Lock Screen, Dynamic Island, widgets, and the Mac menu bar; finishing logs the time - On-device insights: entries per day, focus time, and patterns by tag and mood - Export everything to JSON or Markdown anytime PRIVATE BY DESIGN - No account and no subscription - Your entries live in your own iCloud (a private CloudKit database) and on your devices - There's no server we control and nothing we can read - Turn on Apple's Advanced Data Protection for full end-to-end encryption A NOTE ON THE SCIENCE Built on research into attention, reflection, and habit. Interstitial journaling itself hasn't been formally trialed, and this app is for reflection, not treatment. Requires iPhone or iPad on iOS 17 or later. From comun.ai, a London studio.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.