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
BLOCKJOCKS
The premiere source for ultrasound-guided regional anesthesia educational videos
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
96 ratings · Top 5%
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 included17 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 BLOCKJOCKS: map the core Medical 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 a guided onboarding process or tutorial.
Assumption to check: Users find it difficult to navigate through the app.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize tracking fields and categories.
Assumption to check: Lack of customization options for tracking methods.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce graphical representations of tracking data.
Assumption to check: Limited data visualization features.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance clarity and make the subscription options more user-friendly.
Assumption to check: In-app purchase process is not clear.
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
The premiere source for ultrasound-guided regional anesthesia educational videos The BLOCKJOCKS app is presented by blockjocks.com, the premiere source for free and premium ultrasound-guided regional anesthesia educational videos. BLOCKJOCKS gives anesthesiologists, nurse anesthetists (CRNA), anesthesia residents, and medical students the tools they need to understand and perform simple and complex nerve block techniques to control pain and provide anesthesia and analgesia for orthopedic surgery and other surgical procedures. • Login with your existing BLOCKJOCKS account or create a new subscription within the app. Enjoy our free videos, or for complete premium video library access pay a monthly (VIP-monthly) or a yearly (VIP-annual) subscription with a 7-day free trial, auto-renewing monthly or annually. With a BLOCKJOCKS VIP subscription, you will receive: • Over 130 ultrasound-guided regional anesthesia instructional videos, including high definition procedures, webinars, and the VIP Lecture Series highlighting regional anesthesia expert block jocks from around the world. • Automatically beam videos from your phone to your Chromecast or AirPlay enabled devices • No Internet required! Download videos to watch offline, or stream videos with WiFi, 3G or 4G • "Continue Watching" feature to pick up your video where you last left off • "Add to My List" feature to keep a list of your favorite BLOCKJOCKS videos • Comment on videos with the rest of the international regional anesthesia community • Tell your colleagues about your favorite videos with Twitter, Facebook, texts, and email, right in the app BLOCKJOCKS aims to complement other excellent unaffiliated online resources for regional anaesthesia education including ASRA, ESRA Academy, Block GuRU, NYSORA, Sonosite SonoAccess, and The ABA MOCA Minute. Want to be a BLOCKJOCK too? Download the app and start your free trial today! To access all features and content you can subscribe to BLOCKJOCKS on a monthly or yearly basis with an auto-renewing subscription right inside the app.* Pricing can vary by region and will be confirmed before purchase in the app. In app subscriptions will automatically renew at the end of their cycle. * All payments will be paid through your iTunes Account and may be managed under Account Settings after the initial payment. Subscription payments will automatically renew unless deactivated at least 24-hours before the end of the current cycle. Your account will be charged for renewal at least 24-hours prior to the end of the current cycle. Any unused portion of your free trial will be forfeited upon payment. Cancellations are incurred by disabling auto-renewal. Terms of Service: https://www.blockjocks.com/tos Privacy Policy: https://www.blockjocks.com/privacy
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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
Supabase
Formik
Yup
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.
