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
DataMan - Data Usage Widget
DataMan is the simplest and clearest app to track your data usage
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
691 ratings · Top 30%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
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 DataMan - Data Usage Widget: map the core Finance 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
Implement an intuitive wizard for setting data limits based on usage patterns.
Assumption to check: Users often find it difficult to set data limits accurately
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize notification thresholds for data usage.
Assumption to check: The app lacks customization options for notifications
Validate with people who use this workflow before building.
Hypothesis 3
Improve data fetching and updating mechanisms to ensure real-time accuracy.
Assumption to check: Users report inaccuracies in data tracking
Validate with people who use this workflow before building.
Hypothesis 4
Introduce detailed analytics and insights on data usage trends.
Assumption to check: Limited historical data analysis
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
DataMan is the simplest and clearest app to track your data usage. In just a glance, you can know if you're safe from busting your data cap. Never worry about overage again. REAL-TIME TRACKING Track cellular and WiFi in real-time directly on iOS. No more waiting for your carrier to update. SMART FORECAST Intelligent usage forecast predicts if you'll stay within your data cap. So you can take precautions. DATAMAN WIDGET Instantly check your usage at a glance. Just swipe on your Home or Lock screen to view. CUSTOM USAGE ALERTS Alerts warn you before you hit your data cap. Four custom alert thresholds. DATA PLANS Auto reset on your monthly bill cycle date. Support all billing periods and rollover data with DataMan Pro. SIRI SHORTCUT Get data usage forecast just by asking Siri. An easier, faster way to track your usage with voice. APPLE WATCH Designed for your wrist to quickly show your most important stats in complication and app. BEAUTIFUL INTERFACE Get the key statistics you need most in a beautiful, intuitive interface. It's so easy to track your data usage. "Simplest and clearest" NYTimes "The widget you should be using" Business Insider "We like the easy-to-use DataMan" TIME "Download this great app right now" BGR "Superpretty, superuseful" Cult of Mac "Handy money-saver with colorful alerts" Guardian Featured on USAToday, Macworld, 9to5Mac, AppAdvice, SlashGear and many more. DATAMAN PRO Access extra features with PRO subscription • Free trial 7 days • Daily usage history • Push usage alerts • Manage multiple plans • App icon badge • Custom billing periods • Rollover data • Map usage locations • Export statistics • Widget styles • Themes and more PRIVATE AND SECURE No VPN, no login. Your data is important and private. That's why we take your privacy seriously. Our privacy policy: https://xvision.me/privacy Subscription Information. Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Privacy Policy - https://xvision.me/privacy Terms of Use - https://xvision.me/eula
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
Victory Native
Axios
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.
