App Overview

Tabatach: Interval Timer icon

Tabatach: Interval Timer

EUIHYUNG JUNG · Health & Fitness

TABATACH Timer is an easy to use app for High Intensity Interval Training (HIIT).

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
54 ratings · Top 30%

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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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/
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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 Tabatach: Interval 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.
            

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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

Allow users to create and save custom timer presets.

Assumption to check: Limited customization options for timers.

Validate with people who use this workflow before building.

Hypothesis 2

Provide detailed stats and progress tracking for users.

Assumption to check: Lack of thorough workout history analytics.

Validate with people who use this workflow before building.

Hypothesis 3

Integrate with HealthKit and Google Fit for workout syncing.

Assumption to check: No integration with health platforms like HealthKit or Google Fit.

Validate with people who use this workflow before building.

Hypothesis 4

Improve transparency in subscription tiers and benefits.

Assumption to check: In-app purchase clarity issues.

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

TABATACH Timer is an easy to use app for High Intensity Interval Training (HIIT). It helps you to do Tabata, Crossfit, Kettlebell, Running, Yoga, Cycling or any interval fitness training. Define your workout intervals (work, rest, cycles ) and create unique, personalized workouts. TABATACH is loaded with different types of Whistle Sounds that help identify what part of a workout you are in, interval beeps for example tell you when a new interval has started. It will help you focus on your workout and forget about the time. • Simple and intuitive interface • Distinguishable different types of whistle sounds • The text to speech option will read out exercise names • Customize work time • Customize rest time • Adjust the number of cycles to match your pace • Easy to check the information of Exercises • Restart session where you left off if interrupted • Mute sound • Screen flashes for visual cue • Jump between intervals in the middle of a workout as needed • Pause your workouts if needed • Create your own sets and workouts + WHAT’S HIIT + High-intensity interval training (HIIT) is an enhanced form of interval training, an exercise strategy alternating periods of short intense anaerobic exercise with less-intense recovery periods. HIIT is a form of cardiovascular exercise. Usual HIIT sessions may vary from 4–30 minutes. These short, intense workouts provide improved athletic capacity and condition, improved glucose metabolism, and improved fat burning. This definition comes from wikipedia (http://en.wikipedia.org/wiki/High-intensity_interval_training) where you can find a lot more informations. It explains some very popular program, like the TABATA. HIIT is also a common practice in Crossfit trainings. Thank you for using TABATACH. Please reach out to [email protected] with any issues or suggestions. ** Stay tuned, TABATACH is getting better!

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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
Firebase
React Navigation
Redux
react-native-reanimated
BUILD KIT DIFFICULTY
Starter

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.