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
FileToHash
FileToHash – Effortless Hashing for Files & Text
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 FileToHash: map the core Developer Tools 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
Include more algorithms and provide user customization options.
Assumption to check: Limited hashing algorithms compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a history feature for users to revisit past hashes.
Assumption to check: No ability to save history of generated hashes
Validate with people who use this workflow before building.
Hypothesis 3
Integrate user notifications for success/failure states.
Assumption to check: Lack of user feedback on errors or processing
Validate with people who use this workflow before building.
Hypothesis 4
Add a sharing feature for users to easily communicate hash results.
Assumption to check: No sharing option for hash results
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
FileToHash – Effortless Hashing for Files & Text Easily create secure hashes for text and files with FileToHash! Whether you’re verifying downloads, ensuring file integrity, or securing passwords, our app makes hashing simple and straightforward. Why Choose FileToHash? > User-Friendly: Clean, intuitive design for quick and easy hashing of files and text. > Versatile Hash Generator: Choose from MD5, SHA-1, SHA-256, and SHA-512 algorithms to meet your data security needs. > Text & File Hashing: Hash any text or file with just a tap. > Large File Support: Seamlessly handle files over 5GB without a hitch. > No Unnecessary Features: Focused purely on file integrity checks and password hashing—no clutter, no distractions. Use Cases • Efficient File Integrity Checks: Verify file authenticity and detect any changes or tampering. • Secure Password Storage: Use advanced hash algorithms for safely storing and managing sensitive data. • Data Integrity Validation: Confirm that files remain unchanged during transfers. • Simple Sharing: Generate and share hashes to streamline collaborations and secure exchanges. Experience the power and simplicity of FileToHash, your go-to app for fast file hashing and secure data integrity verification. Hashing has never been this straightforward!
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
Zustand
expo-file-system
React Navigation
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.
