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
E2PDF Pro (Easy Backup)
You can get PDF backup of almost everything (Contacts, Photos) and can instantly backup in email.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.6
24 ratings · Below Average
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 E2PDF Pro (Easy Backup): map the core Utilities 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
Add more PDF editing features and integrations.
Assumption to check: Limited functionality compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a modern design with improved navigation.
Assumption to check: Poor user interface and experience
Validate with people who use this workflow before building.
Hypothesis 3
Enhance stability and testing before release.
Assumption to check: Frequent crashes and bugs reported
Validate with people who use this workflow before building.
Hypothesis 4
Clarify pricing structure and offer better trial options.
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
You can get PDF backup of almost everything (Contacts, Photos) and can instantly backup in email. DISTINCT FEATURES OF APP 1- Contact Backup E2PDF is very simple but highly productive app that allows you to take backup of your full contact once and then never loose that again. All you have to do is to one-click taking backup in PDF, whole contact will be created. Generated backup file can be stored on local drive or in email and can be instantaneously shared. 2- Photo Backup Backup whole photo to one file PDF for easy to manage/storage Generated super backup file can be stored locally or in email or you can share it anywhere. contact/photo export feature is developed by using standard procedures so you can save contact/photo easily and also format of generated PDF is supported by all major pdf readers. PDF is generated using stranded writers so output file is compatible with almost all known readers including Adobe Acrobat, Nitro, Xodo PDF Reader, Sumantra , Radaee ,Preview, Foxit, PDF-XChange and many more. The output generated file can easily be shared over email, Whatsapp, WiFi-direct, Bluetooth and you can store anywhere you want.
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
Expo
React Navigation
React Native Reanimated
Expo Document Picker
Axios
Zustand
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.
