App Overview

Fyra: Workout Timer icon

Fyra: Workout Timer

Andrew Garney · Health & Fitness

fyra is a powerful, beautifully designed interval timer built for real workouts

$1.99 · In-app purchases

PRICE
$1.99
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.

Build your own version

Build Kit

Make this idea yours

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

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

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/
Preview a sample Build Kit No email needed

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.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

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 Fyra: Workout Timer: 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.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

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

Add social sharing and workout challenges to motivate users.

Assumption to check: Lack of community engagement and social features

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to create and save custom workout routines.

Assumption to check: Limited customization options for timers

Validate with people who use this workflow before building.

Hypothesis 3

Implement a progress tracking system with history and statistics.

Assumption to check: No progress tracking features

Validate with people who use this workflow before building.

Hypothesis 4

Provide clear explanations of premium features and benefits.

Assumption to check: Monetization may not be clear

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

fyra is a powerful, beautifully designed interval timer built for real workouts. whether you're crushing hiit, flowing through circuits, or building your own custom routines, fyra keeps you on track with voice coaching, precise timing, and zero distractions. timer that never quits lock your screen, switch apps, check a message — your workout keeps running. fyra announces each exercise aloud so you never have to look at your phone. control playback right from your lock screen. 50+ pre-built workouts ready-to-go routines targeting every muscle group: • chest, back, shoulders & arms • legs, glutes & core • full body & cardio • hiit, tabata, emom, amrap & circuit formats build your own create custom workouts in seconds. set exercises, durations, rounds, and rest periods. save them, favorite them, share them. track your progress • workout history & calendar • streak tracking to keep you motivated • weekly goals with visual progress • muscle recovery suggestions • apple health integration — workouts sync automatically designed for focus • voice announcements for every exercise • countdown alerts so you're always ready • haptic feedback you can feel • clean, dark interface that's easy on the eyes privacy first no account required. no ads. no tracking. your data stays on your device. please consult your physician before beginning any exercise program. fyra is not intended to provide medical advice, diagnosis, or treatment

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

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/native
expo-av
react-native-reanimated
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.