App Overview

Nordics icon

Nordics

Carlos Balsalobre · Sports

***Improve your hamstring prevention protocol with Nordics!***

$14.99 · In-app purchases

PRICE
$14.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
2 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 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.

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 Nordics: 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

Offer personalized workout recommendations based on user preferences.

Assumption to check: Limited workout variety

Validate with people who use this workflow before building.

Hypothesis 2

Integrate social features for users to share progress and tips.

Assumption to check: No community features

Validate with people who use this workflow before building.

Hypothesis 3

Provide video analysis and feedback from professional trainers.

Assumption to check: Lack of real-time coaching

Validate with people who use this workflow before building.

Hypothesis 4

Introduce a free tier with basic features to attract more users.

Assumption to check: High subscription cost

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

***Improve your hamstring prevention protocol with Nordics!*** From the designer of hits like My Jump 2, My Lift or Runmatic, Nordics is the first app specifically designed to monitor your performance in the nordic hamstring exercise (NHE). The app measures with high accuracy the breakpoint angle achieved on the NHE, based on recent research that shows that this angle is highly related to hamstring eccentric strength. Moreover, based on that angle and using some cool biomechanics, it also measures an important metric, the torque (rotational force) at that point! For this, and taking into account the well-known benefits of the NHE for the prevention of hamstring injuries, Nordics can help you monitor your athletes to improve your prevention protocols and get the most out of your athletes! Nordics is very simple to use but includes advanced features that can help you monitor the performance of your athletes in the NHE in a professional way such as: -Measures the torque and breakpoint angle on the NHE using accurate video-analysis -Measures your leg asymmetry with the unilateral test -Organize your athletes in teams, and create as many teams and athletes as you want. Unlimited data base! -Export your whole database to a CSV file to work in Excel or other spreadsheet apps -Save as many tests as you want for each athlete and check his/her evolution over the season -Get warnings when your athlete significantly decreases his/her performance so you can readjust your training program Nordics, measure your NHE performance and prevent hamstrings injuries with your iPhone, iPad or Mac!

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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
Zustand
Chart.js
React Navigation
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.