App Overview

RotoGrinders Daily Fantasy icon

RotoGrinders Daily Fantasy

RotoGrinders · Sports

If you’ve ever felt lost building DFS lineups without a computer in front of you, we’ve taken all the main components to building lineups like the experts and turned it mobile – the RotoGrinders Daily Fantasy app

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.8
14,920 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 included18 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.

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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for RotoGrinders Daily Fantasy: map the core Sports 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 guided tutorials that simplify lineup creation.

Assumption to check: Complexity of lineup management can overwhelm new users.

Validate with people who use this workflow before building.

Hypothesis 2

Offer advanced stats and comparison features.

Assumption to check: Limited player analysis tools compared to competitors.

Validate with people who use this workflow before building.

Hypothesis 3

Provide more value in premium features to justify costs.

Assumption to check: Subscription pricing may deter users from upgrading.

Validate with people who use this workflow before building.

Hypothesis 4

Integrate social sharing options and community leaderboards.

Assumption to check: Lack of social features to share lineups.

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

If you’ve ever felt lost building DFS lineups without a computer in front of you, we’ve taken all the main components to building lineups like the experts and turned it mobile – the RotoGrinders Daily Fantasy app. Whether you just want to build one optimal lineup or enter 150 into a GPP, we’ve got you covered, and the best part is you can upload the lineups you create directly to DraftKings and FanDuel in seconds. Once you’ve entered lineups, stay up to the minute on all pertinent DFS breaking news, late scratches, lineup changes and weather information with the RotoGrinders Daily Fantasy app! It’s absolutely a must-have for anyone trying to turn a profit playing daily fantasy sports. Our team of dedicated daily fantasy analysts monitor a number of sources and alert you of anything you need to know to build the best possible DFS lineups each night. Not only do we post starting lineups and injury news faster than anyone in the industry, but we also tie that into analysis to help users apply that information in the most useful way. In past years you’d have to stay at a computer constantly to stay up-to-date, but our ability to send push alerts to mobile phones allows our users to manage their DFS lineups and entries on the go. Make no mistake – the RotoGrinders Daily Fantasy app does more than optimize lineups and send push notifications as soon as news is announced. To help you turn these alerts into action, all notifications contain priority and analysis from our RotoGrinders team of experts. This late-breaking news can greatly affect lineup construction on any given day, especially in daily fantasy NBA and MLB. In all, the RotoGrinders Daily Fantasy app allows you to: 
- Optimize one lineup with the help of our Expert Filter Picks – Core, Cash Plays, GPP Plays, Salary Savers and Conviction Plays - Build up to 150 different lineups using advanced settings and upload them directly to DraftKings or FanDuel through the RotoGrinders Daily Fantasy app - Manage entries and adjust to late-breaking news. - Receive push notifications when high priority news breaks (think late scratches, injury updates, game cancellations) - View our entire DFS Alerts feed in the app, including alerts and applicable DFS analysis of all priority levels, sortable by sport - Be alerted when daily lineups are released and access them (as well as that team's DFS salaries) with a single click - Manage notifications to only receive alerts for the sports or sites you want - Play Grinders Live shows in audio-only format as well as making the podcasts available after the fact 
 In-App Purchases - Combo Premium for all sites is available for $99.99/mo – Payment will be charged to iTunes Account at confirmation of purchase – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase – https://rotogrinders.com/pages/privacy-policy-3963625 – https://rotogrinders.com/pages/rotogrinders-terms-of-service-3963630 This is your one-stop lineups and news app for your daily fantasy sports games. Download now and never miss a breaking lineups alert again!

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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
React Navigation
Redux
Axios
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.