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.
Introducing Grain by Moment.
$4.99 · 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.
First kit free with a verified email
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 Grain – Video Preset Maker: map the core Photo & Video 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: Limited preset customization options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchase confusion and lack of clarity on subscription benefits.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Performance issues with video processing on older devices.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited sharing options for edited videos.
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.
Introducing Grain by Moment. Make pro-grade video presets in minutes...all on your iPhone and iPad. It’s as simple as editing a photo, using your fingers to dial in the texture, color, grain, light leaks, borders, and overlays you want. Import, create, and export right back into your favorite editing app. Follow us @grain.app on Instagram for tips and tricks and tag #grainapp to share what you make! Make Templates Your Own – Grain comes with ready-made looks made by filmmakers, each with its own set of color adjustments, effect layers, and overlays. These templates can be modified and duplicated into your own custom looks. Color Grade in Minutes – Color grading is hard. Grain gives you all the tools you need to color grade at your fingertips. Edit brightness, contrast, highlights, shadows, whites, blacks and temperature to start - then go deeper with pro level controls like Curves and Color Wheels. Use Effects With Ease – Our libraries are filled with high quality, pro level effects like light leaks, grain, dust, prisms and more to your video. Tap to add an effect, then use gestures to adjust. Share With Friends – iMessage or Airdrop your look to a friend, or send your looks between your devices during your editing flow. You can also share looks to RTRO, our fun photo/video capture iPhone app, to start shooting with custom looks right away! Export to Your Editing App – Export your own LUTs so you can import and apply them in your favorite editing software. Whether on your phone, iPad, or Desktop...Grain makes it fast to use your looks on any videos. ––– GRAIN+ Subscribe to unlock all effects and advanced features! Your support means we can keep delivering new looks and the highest quality app experience. With Grain (Free): ‣ 1 editable template look ‣ Create unlimited looks ‣ Basic color slider tools ‣ Import clips from camera roll (up to 3 clips, 5s max) ‣ Preloaded video library with high-quality sample clips ‣ 3 color presets ‣ 3 effects (Grain, Dust, Color Shift) ‣ 1 single-frame layout preset ‣ Share looks via iMessage, Airdrop, etc. ‣ Shoot with looks in RTRO With Grain+: ‣ 3 editable template looks ‣ 9 exclusive color presets ‣ Unlimited length for clips and videos ‣ Premium color tools - sliders, curves, HSL, wheels ‣ Import and export LUTs ‣ Export effects as overlays ‣ Stocked library with pro-level effects ‣ Customizable frames and overlay presets ‣ Special overlay layers - sprockets, text, and more The Grain+ yearly subscription is $29.99/year. The Grain+ monthly subscription is $4.99/month. Pricing in other countries may vary and prices may be converted to your local currency. Your subscription will auto-renew each year. If you choose a monthly subscription your billing will start immediately and auto-renew each month unless cancelled within 24 hours before the end of your current period. Payment is charged to your Apple ID account at the confirmation of purchase. You can manage or cancel your subscription by going to your Account Settings in the App Store. Privacy Policy: https://www.shopmoment.com/privacy-policy Terms of Use: https://www.shopmoment.com/terms-of-service Thank you for your support!
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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.