App Overview

Moonfast icon

Moonfast

https://airussolutions.com/ · Health & Fitness

Moonfast is a quiet intermittent-fasting timer for people who would rather not

$0.99

PRICE
$0.99
No 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.

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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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

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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.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

Moonfast is a quiet intermittent-fasting timer for people who would rather not be shouted at by an app. Pick a protocol — 16:8, 18:6, 20:4, OMAD, or your own hours — and start. The ring shows how far into your fast you are, and keeps counting if you go past your goal. LIVE ON YOUR LOCK SCREEN Start a fast and it appears as a Live Activity, so the timer is there without unlocking. The Dynamic Island keeps it at a glance, and Home and Lock Screen widgets show your current fast, your streak and your longest fast so far. A GENTLE STAGE TIMELINE As the hours pass, Moonfast describes the stages people commonly associate with fasting windows. It is written to be interesting, not instructive — bodies differ, and the app says so. YOUR HISTORY, HONESTLY A calendar of the fasts you have finished, current and longest streaks, weekly averages and personal bests. When there is not enough data yet for a number to mean anything, Moonfast says that instead of inventing one. WEIGHT, SMOOTHED Log your weight, or connect Apple Health and let it come across on its own. Moonfast draws a smoothed trend line through the daily noise, because day-to-day weight moves on water alone. Connecting Apple Health is optional, and the app works fully without it. VITALS, SIDE BY SIDE If Apple Health has your resting heart rate, heart rate variability or time asleep, Moonfast charts them next to the days you fasted. It shows the readings; it does not tell you what they mean. Readings come from an Apple Watch or another app — Moonfast only reads them. HYDRATION Log water, tea or coffee while you fast. If you want a daily target you can set one — Moonfast will not pick one for you. PRIVATE BY DEFAULT No account. No servers. No analytics. Everything you log stays on your iPhone, and you can export all of it as JSON or delete every trace of it whenever you like. Moonfast is a timer and a log. It is not a medical device, and it does not give medical advice, diagnosis or treatment. Talk to a doctor before you change how you eat, especially if you take medication or have a health condition. Moonfast is not intended for anyone under 18, for anyone who is pregnant or breastfeeding, or for anyone with or recovering from an eating disorder.

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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
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.