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
Brain Tool Kit
Brain Tool Kit: Visual, Vestibular & Cognitive Training for Neuroperformance
$17.99 · In-app purchases
PRICE
$17.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
6 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 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 Brain Tool Kit: map the core Health & Fitness 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
Incorporate more diverse and engaging exercise types.
Assumption to check: Limited variety of exercises leading to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Offer a freemium model with more free content.
Assumption to check: High subscription cost for premium features.
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing and challenge features to foster community.
Assumption to check: Lack of social features for user engagement.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance progress tracking with more metrics and visualizations.
Assumption to check: Insufficient progress tracking options.
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
Brain Tool Kit: Visual, Vestibular & Cognitive Training for Neuroperformance Brain Tool Kit is an interactive digital training platform designed to support sport vision performance, concussion rehabilitation, vestibular rehabilitation, and cognitive-motor training. It is many apps all in one easy to use place. Using customizable visual stimuli, eye movement exercises, memory challenges, and cognitive tasks, Brain Tool Kit helps practitioners and users train the systems involved in attention, visual processing, reaction speed, working memory, and sensorimotor integration. Features include: Visual & Vestibular Training • Gaze fixation and gaze stability exercises • Smooth pursuits • Saccades and anti-saccades • Optokinetic (OPK) stimulation • Hemifield stimulation • Eye movement combinations and progression-based exercises Cognitive & Neuroperformance Training • Interactive Stroop tasks requiring responses to incongruent visual information • Random letter and shape tasks for attention, processing speed, and verbal fluency training • Memory tasks including recall and working memory challenges • Customizable colour, speed, duration, and difficulty settings Brain Tool Kit allows practitioners to customize activities based on individual goals and use the app as part of structured rehabilitation, sports performance as well as many other neuroperformance areas. Designed for use alongside professional guidance, Brain Tool Kit can support: • Concussion recovery programs • Vestibular rehabilitation • Vision therapy programs • Sports vision and neuroperformance training • Cognitive-motor rehabilitation Brain Tool Kit targets key performance systems including: • Attention and concentration • Processing speed • Working memory • Visual processing • Eye movement control • Cognitive flexibility • Balance and sensorimotor integration Assessment modules include: • Balance • Reaction time • Subjective visual vertical • Symptom scale *To be interpreted by clinician or used for general information. No diagnostic information is provided. Whether used for rehabilitation or performance enhancement, Brain Tool Kit is an easy to use tool with lots of functionality. PLEASE NOTE: The minimum requirement for app installation is iOS 15
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
Redux
axios
react-native-chart-kit
@react-navigation/native
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.
