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
Sintra: AI Employees
Meet Sintra - Your Team of 12 AI Employees
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
1,828 ratings · Top 15%
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 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 Sintra: AI Employees: 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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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
Allow deeper customization options for task settings.
Assumption to check: Limited customization of tasks and reminders
Validate with people who use this workflow before building.
Hypothesis 2
Optimize AI processing for real-time interactions.
Assumption to check: Occasional lag in AI response times
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline task management capabilities.
Assumption to check: No offline access to tasks
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a freemium model with more features for free users.
Assumption to check: Subscription model may deter users
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
Meet Sintra - Your Team of 12 AI Employees. Transform your business with Sintra, featuring 12 specialized AI employees ready to help you grow, automate, and succeed. Trusted by over 60,000 businesses and featured in Business Insider as "Disrupting the tech space with innovative AI assistants." MEET YOUR NEW TEAM Cassie - Your Customer Support Expert Seomi - Your SEO Strategist Buddy - Your Business Development Partner Emmie - Your Email Marketing Specialist Dexter - Your Data Analyst Penn - Your Creative Copywriter Commet - Your eCommerce Manager Gigi - Your Personal Growth Coach Milli - Your Sales Expert Vizzy - Your Executive Assistant Scouty - Your HR & Recruitment Pro Soshie - Your Social Media Manager WHY CHOOSE SINTRA POWERFUL AUTOMATIONS Auto-post social media content with Soshie Auto-respond to customer comments with Cassie Get daily business summaries from Vizzy Set up once, benefit forever SMART BRAIN AI Personalized responses based on your business context Gets smarter with every interaction Maintains brand consistency across all helpers Securely stores your business information SEAMLESS INTEGRATIONS Connect your favorite platforms: Social Media: Facebook, Instagram, LinkedIn Productivity: Gmail, Outlook, Google Calendar Storage: Google Drive, Google Sheets And more! DAILY INSPIRATION 12 fresh, personalized business ideas daily One-click implementation Tailored to your industry and goals Over 1,800 fresh ready-to-use activities monthly FLEXIBLE WORKSPACES Switch between personal and business accounts Manage multiple brands effortlessly Customize each workspace's Brain AI Access from both desktop and mobile WHAT OUR USERS SAY "The most impactful investment I've made for my business this year." - Dawlish, GB "Like having a team of specialized experts right at my fingertips 24/7." - R Dunn, US FEATURES AT A GLANCE 12 specialized AI employees Smart automation tools Integrated workspace management Real-time chat assistance Custom activity library Cross-platform compatibility Regular monthly updates Enterprise-grade security GET STARTED TODAY Quick onboarding process Free 7-day trial with yearly plan Starting from $39/month SECURITY & PRIVACY No third-party data sharing Private and secure workspaces Regular security updates Download Sintra today and experience the future of business management with your own team of AI employees. Whether you're a solopreneur or small business owner, Sintra helps you work smarter, not harder. Subscription Information: Sintra X subscription starts at $39/month Annual plan available at $299/year with 7-day free trial Subscription automatically renews unless auto-renew is turned off Cancel anytime through your Account Settings Terms of Service: https://sintra.ai/terms-and-conditions Privacy Policy: https://sintra.ai/privacy-policy Get Help: https://sintra.ai/help
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
Axios
TypeScript
React Navigation
AsyncStorage
BUILD KIT DIFFICULTY
Advanced
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.
