App Overview

Set the clock icon

Set the clock

Frank Guchelaar · Education

* Listed in the top 3 of educational apps in the Dutch App Store!

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.5
959 ratings · Top 15%

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 included17 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 Set the clock: map the core Education 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

Introduce gamification elements like rewards and levels.

Assumption to check: Limited interactivity and user engagement

Validate with people who use this workflow before building.

Hypothesis 2

Add immediate feedback and explanations for wrong answers.

Assumption to check: Lack of feedback for incorrect answers

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to customize clock styles and backgrounds.

Assumption to check: Minimal customization options

Validate with people who use this workflow before building.

Hypothesis 4

Integrate sharing options for users to share progress or challenges.

Assumption to check: No social or sharing features

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

* Listed in the top 3 of educational apps in the Dutch App Store! ‘Set the clock’ can help your child to learn to tell time and revives old times by reintroducing the wooden clock on the iPad, iPhone or iPod Touch! You can practice together with your child, or let him/her perform assignments on his/her own using the nine game types in the App: "Set the clock’, ‘Tell the time’, ‘Adjust the clock’ and more. The assignments are clearly pronounced in English. Besides English, it is also possible to have the assignments spoken in Dutch, German, French, Spanish and even Chinese. This makes that "Set the clock" can provide enough challenge even for older children. Each game type, has five levels of difficulty. When enough correct answers are given, you are rewarded with a bronze, silver or gold medal! The app is fully usable even without the Multiple Profiles option. Features: - Beautifully designed wooden clock. - Earn medals and shows that you are a real time telling champion! - Multiple game modes (nine in total; analog and digital): > Learn to set the clock to the correct time. > Choose which clock displays the correct time. > Learn to set the clock ahead or back. - Tap the clock’s digits to hear what number it is. - English spoken, so your child can practice independently. - Different levels: hours, half hours, per quarter and per 5 minutes. - Also suitable for older children / pupils, because of the ability to tell time in other languages. In short: a great educational app for both young and old. Learn telling time is just as fun as ever!

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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
Zustand
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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.