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
Fast Forward Videos -Boomerang
Use Fast Forward Videos as the practical video editing app to import a video from your Camera Roll or iCloud/Files and determine the times you want it to be play backed
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
436 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 included18 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 Fast Forward Videos -Boomerang: 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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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
Offer a wider range of filters and effects.
Assumption to check: Limited filter options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Introduce features like trimming, merging, and text overlays.
Assumption to check: Lack of advanced editing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize video processing for better performance.
Assumption to check: Inconsistent performance on older devices
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the pricing structure and clarify benefits of premium features.
Assumption to check: In-app purchase confusion
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
Use Fast Forward Videos as the practical video editing app to import a video from your Camera Roll or iCloud/Files and determine the times you want it to be play backed. You can speed up and playback a video unlimited times. You can convert any video you like to a Boomerang style video, view it and share it! IMPORT AND FAST FORWARD VIDEOS This is easy to use and super practical video editing app that offers a simple way to fast forward your videos and turn them into sophisticated sequences. Import any video you want from your Camera Roll or iCloud/Files and fast forward your chosen video with ease. EASY & PRECISE CONTROL With this video app, you get a slider so you can precisely and easily choose how fast you want your video to be play backed. You are offered unlimited tries on the app to playback your video as much as you want and as long as you want to get the perfect result you are looking for. Playback a video 2x, 3x, 4x and so on. This makes the videos run faster, giving you simple editing power to play long clips into a shorter period. For example, you can play a 30-second video in 1 second if you like. VIEW AND SHARE THE VIDEOS The videos you playback with Fast Forward Videos can be viewed in full-screen viewer. Save the videos you playback using this app directly to your camera roll so you can discover them at any time and easily share the ones you like with others. FAST FORWARD VIDEOS FEATURES - Easy to use and practical way to speed up videos - Convert any video to a boomerang style videos - Slow down any video to achieve slow-motion effects - Import videos from Camera Roll or iCloud/Files - Determine the times you want the video to be played - Choose precisely how fast you want the video to be played - Unlimited tries to forward videos - View the videos in a full-screen viewer - Save the fast videos to your Camera Roll - Share the forwarded videos Use the app to forward videos as many times and as fast as you want. Download it now & start editing your videos for FREE!
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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.
SUGGESTED BUILD STACK
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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.
