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.
Easily convert media to a desired format in a versatile way to save storage space, send media faster or make it compatible with online platforms or other apps
$1.99 · 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 Media Converter Flex: 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: Limited media format support
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Occasional conversion failures
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lacks advanced settings for conversions
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No cloud storage integration
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.
Easily convert media to a desired format in a versatile way to save storage space, send media faster or make it compatible with online platforms or other apps. Media Converter Flex supports converting videos, audios, images and even texts. With the built-in voice memo app, you can record audio directly to MP3 format. All features in detail: Video - Convert video from Photos app or files to MP4 format or GIF - Reduce the file size by several times - Specify whether MCF should focus on fast conversion or smaller file sizes - Limit the storage size by setting a limit that MCF should adhere to*. - Conveniently combine multiple videos with the same properties (height, width) into a single video - Automatically convert many videos one after another without doing anything else* Audio - Convert M4A or AAC files to MP3 or OGG format - Set the kbit rate to optimize file size or quality - Combine multiple audio files into a single MP3 file - Convert an audio to MP4 video file with still image - Specify meta data such as title, artist and album*. - Automatically convert many audios one after another without doing anything else* Image - Convert images from Photos app or files to JPG or PNG format - Scale images to a desired width or height - Reduce file size by adjusting image quality - Convert one or more photos into a (multi-page) PDF file - Take one photo and save it individually or with other images as a PDF file - Automatically convert many images one after another without doing anything else* Audio recording - Record yourself directly into MCF to save the result as an MP3 file - Pause your recording easily Text - Scan text from images to copy the text or convert into high-quality audio so you can listen to the text - Have text converted to amazingly authentic-sounding audio that you can save as an MP3 file* - Optionally have the text translated into a language of your choice beforehand* Individual presets* - Save a lot of time by saving your desired settings. All parameters can be changed and saved permanently, so you don't need to change anything in future conversions, just select the files you want. - Export and import your settings to easily configure a new device with your personal preferences. * The marked features require an inexpensive Plus subscription
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.