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.
Introducing Dual Messenger & Duo Web, an advanced message backup app designed to protect your precious conversations and memories in the safest and most seamless way
Free · 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 Dual Messenger & Duo Web: map the core Social Networking 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 messaging features compared to standalone apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulties in managing multiple accounts
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Slow performance when syncing messages
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of customization options
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.
Introducing Dual Messenger & Duo Web, an advanced message backup app designed to protect your precious conversations and memories in the safest and most seamless way. With the user in mind, we designed an intuitive solution to backup messages in the WhatsApp chat app, ensuring you never lose any important chats. You can rest assured that your text messages, including messages containing important details, emotional exchanges or critical business information, as well as precious pictures, videos or files are safely stored on the device of your choice. Features that make us different: View your backed up chat messages: After you accidentally delete photos, videos or text chats, you can still view the backed up message history in the original chat style in our app. Dual Accounts: Manage multiple WhatsApp accounts on the same phone without frequent logout and login, saving time and energy. For example, business people can set up one account dedicated to work communication and another account for private communication, effectively distinguishing work and life information and reducing information confusion. Quick Search: Use our search function to quickly search chat records for specific words to save your time. Password Protection: Set an unbreakable password for your message backup to safely protect your chat backup messages, media, and important files. Secure Encryption: Rest assured that your message backup files and data are encrypted using industry-leading standards to protect your privacy and secure your conversations from unauthorized access. Minimum Battery and Data Usage: Our app is optimized for efficiency, minimizing the impact on your device's battery life and data usage, ensuring that backups run smoothly without interrupting your daily life. Say goodbye to the worry of losing important messages forever. Download Dual Messenger & Duo Web now and enjoy the freedom of always having your conversations at your fingertips. Dual Messenger & Duo Web is an unofficial tool for WhatsApp. Dual Messenger & Duo Web is developed by an independent developer. We are not associated, affiliated, authorized, endorsed, or officially connected with WhatsApp LLC or any of its subsidiaries or affiliates. Use of this app falls within the "fair use" guidelines. Note: Subscription services require additional purchase. After purchasing a subscription, you will unlock the WhatsApp message backup feature, picture cleanup feature, and picture editing feature. If you subscribe through Apple, payment will be charged to App Store Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal at the selected plan's rate within 24 hours prior to the end of the current period. Subscriptions and auto-renewal can be managed by going to your App Store Account Settings after purchase. Privacy Policy: https://sites.google.com/view/dualpp Terms: https://sites.google.com/view/dualterms
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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.