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
TotLock
TotLock turns any YouTube video into a tap-proof, swipe-resistant fullscreen experience built for one job: keeping a tiny human happy while a grown-up gets thirty seconds to themselves.
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 TotLock: map the core Photo & Video 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
Include advanced editing tools like AI filters and batch editing.
Assumption to check: Limited editing features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Enhance sharing capabilities with social media integration.
Assumption to check: Lack of sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud backup for photos and edits.
Assumption to check: No cloud backup
Validate with people who use this workflow before building.
Hypothesis 4
Add layer support for non-destructive editing.
Assumption to check: No support for layered edits
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
TotLock turns any YouTube video into a tap-proof, swipe-resistant fullscreen experience built for one job: keeping a tiny human happy while a grown-up gets thirty seconds to themselves. Hand the phone to a baby. Walk away. The video keeps playing. WHAT IT DOES • Tap-proof video. Touches on the player are absorbed. No accidental pause, no skip, no jumps to suggested videos or the channel page. • Hand-it-over confidence. The home indicator is hidden, the status bar is hidden, and the screen stays awake while a video is playing. • Stickier than the home gesture. iOS swipe-down for Notification Center and Control Center is deferred so they need a deliberate second pull. Random palm-swipes don't escape. • Secret unlock combo. Triple-tap the bottom-left corner, then triple-tap the bottom-right corner within 5 seconds. Easy for an adult, almost impossible for tiny fingers to do at random. The corners glow softly when you tap the screen, reminding you where to aim. • Share from YouTube. In the YouTube app, tap Share, then "Open in TotLock". The video opens here, locked and playing. One tap. • Auto-resume. Phone call interrupted you? Screen locked? When you come back to TotLock, the video automatically resumes. • Paste-from-clipboard fallback. If you'd rather copy the link from anywhere, TotLock detects URLs on your clipboard and surfaces a one-tap Paste card. FOR THE STRICTEST MODE: GUIDED ACCESS iOS Guided Access pairs perfectly with TotLock. Settings → Accessibility → Guided Access → toggle on and set a passcode. Then, after starting playback in TotLock, triple-click the side button. iOS will pin the app on screen until you triple-click again and enter your passcode. This is the most foolproof setup for handing the phone to a small child. WHAT IT IS NOT TotLock is not a curated video service. It plays whatever video link you hand it. We don't pre-screen content for age-appropriateness. You are responsible for what your child watches. If a video has been published with embedding disabled by its uploader, TotLock will show the standard "watch on YouTube" placeholder. Pick a different video. REQUIREMENTS • iPhone (this app is iPhone-only) • iOS 16.0 or later TotLock is built with one parent in mind: the one who needs both hands free for thirty seconds.
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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
Zustand
react-navigation
expo-image-picker
expo-media-library
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.
