App Overview

Mainline: Asphalt Planner icon

Mainline: Asphalt Planner

Jon Bailey · Business

Mainline is a field-ready daily planner for asphalt paving and milling crews.

$9.99

PRICE
$9.99
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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A product spec, screen plans, and build steps for your coding agent.

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What's included

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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Mainline: Asphalt Planner: map the core Business workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

Mainline is a field-ready daily planner for asphalt paving and milling crews. Build a paving plan from station to station in either direction. Enter the paving width, desired spread rate, paver speed, truck capacity, and plant distance to calculate planned tonnage, production time, truck cycle time, and the fleet needed to keep the operation moving. See cumulative target tons at every 100-foot station. During production, enter your current station and actual tons laid to see whether the crew is above or below target. Mainline calculates the adjusted spread rate needed over the remaining run to finish on yield. For milling operations, use machine speed, cut depth, haul distance, and truck capacity to estimate reclaimed material and truck demand. At the end of the shift, enter total delivered tons and waste. Mainline creates a clear daily report with placed tons, waste percentage, gross yield, and final waste-adjusted spread rate. FEATURES - Ascending or descending stationing - 100-foot cumulative tonnage targets - Paver production and truck-cycle planning - Milling tonnage and truck planning - Live yield and spread-rate correction - End-of-day waste-adjusted reporting - Local saved plans - Shareable station plans and daily reports - Fully offline with no account or tracking Mainline provides planning estimates based on the values entered. Verify field conditions, material characteristics, haul cycles, and project requirements before making operational decisions.

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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

Competitive pricing with generous free tier

Assumption to check: Expensive subscription

Validate with people who use this workflow before building.

Hypothesis 2

Focus on most-requested features first

Assumption to check: Missing features

Validate with people who use this workflow before building.

Hypothesis 3

Optimize for 60fps, fast load times

Assumption to check: Poor performance

Validate with people who use this workflow before building.

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
RevenueCat
BUILD KIT DIFFICULTY

Not assessed in a Build Kit yet.

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.