App Overview

Prime Timed icon

Prime Timed

I Make Robots Work LLC · Health & Fitness

Prime Timed was made for those who wanted a simple interval timer app — but also love deep sound customization for rounds as well as personal training programs utilizing voice to create the workouts

$0.99

PRICE
$0.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 Prime Timed: 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.
            

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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

Prime Timed was made for those who wanted a simple interval timer app — but also love deep sound customization for rounds as well as personal training programs utilizing voice to create the workouts. Use it as plain as a stopwatch, or go as deep as you like. It can be as simple or as complex as you need. Live widget and privacy focused. START IN SECONDS Pick from a list, hit Start. Huge, readable numbers and round names you can see from across the room, with color-coded Work, Rest, and Get Ready screens. READY-MADE TIMERS INCLUDED Popular HIIT and Tabata protocols are already set up — Tabata Classic, 30/30, 40/20, 45/15, 50/10, EMOM, AMRAP, sprint intervals, and more — plus boxing rounds, Muay Thai and MMA rounds, CrossFit benchmarks (Murph, Fight Gone Bad, Fran), and a full set of jiu jitsu competition-prep timers built on standard match times for every belt, from White through Black, along with ADCC-style rounds. SOUND CUSTOMIZATION THAT GOES DEEP • A distinct sound for every moment: work start, rest, finish, beginning countdown, round countdown, and a round-ending warning — each with its own volume. • Record your own voice, or import audio, right inside the app. Every sound you add is available everywhere. • Timed Sounds: play any sound at an exact second of any round — into the round, before it ends, before it starts, even before the whole workout's countdown. Pick exactly which rounds it plays in. • Inspirational Sounds: build a pool of clips that play at random intervals during work — motivation that never gets stale. • Pause-while-playing: freeze the clock while an instruction plays, then resume automatically. Perfect for coached drills. • Music-friendly: your playlist keeps playing; Prime Timed can duck it under cues and bring it right back. DON'T LIKE THE COLOR OR FONT • Now a font selection system in the settings menu that allows you to pick from a number of fonts that change not only the system font but, the timer fonts as well. • Don't like the default color scheme then you can pick from a number of them or completely customize it to your liking MADE FOR TRAINERS Personal trainers of any kind: record your own voice giving commands at any interval, in any round. Build a coached session once — "switch sides," "last ten seconds," "water break" — and it runs itself. SHARE EVERYTHING Send a timer to anyone and it arrives complete — settings AND your custom recorded sounds travel with it. Build once, share with your whole gym.

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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

Add advanced workout analytics and types.

Assumption to check: Limited workout tracking features.

Validate with people who use this workflow before building.

Hypothesis 2

Integrate social challenges and sharing options.

Assumption to check: No community features or social sharing.

Validate with people who use this workflow before building.

Hypothesis 3

Enhance UI with themes and customizable layouts.

Assumption to check: Basic interface without personalization.

Validate with people who use this workflow before building.

Hypothesis 4

Introduce progress photos and statistics.

Assumption to check: Lack of progress tracking over time.

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
Zustand
react-navigation
expo-av
react-native-paper
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.