App Overview

Moving Mass icon

Moving Mass

Bruce Jaouen · Health & Fitness

Moving Mass is for people who would rather train than manage a fitness app

$2.99

PRICE
$2.99
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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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.

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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

Moving Mass is for people who would rather train than manage a fitness app. Build a repeatable week, log the work, and see whether you are actually progressing—without creating an account or handing over your training data. BUILD A WEEK YOU CAN REPEAT Choose your training days and priorities, then start with a ready-made strength, cardio, hybrid, or power plan. Moving Mass favors stable staple movements you can practice and improve instead of reshuffling your exercises every week. AN EXERCISE LIBRARY MADE TO BE USED Browse an illustrated library by body part, search for what you need, or create your own exercises and workouts. Everything can be adjusted around your equipment and the way you train. LESS TAPPING. MORE TRAINING. Training Now keeps the current exercise, set, repetitions, load, and rest timer where you need them. Swipe to adjust values, swap an exercise when equipment is busy, and check the workout map without rebuilding your saved program. QUICK WHEN YOU WANT IT Quick Set starts a single exercise immediately. Workout Roulette lets you choose the number of exercises and sets, deals a random non-cardio workout, and gives you a reroll before you begin. PROGRESSIVE OVERLOAD WITH CONTEXT Moving Mass remembers working loads and completed repetitions. Record reps in reserve (RIR), compare the last session, and review progression suggestions grounded in work you actually completed. STRENGTH AND CONDITIONING, TOGETHER Track barbell, dumbbell, machine, cable, bodyweight, running, cycling, and swimming sessions in one calm record. Plan hybrid weeks without squeezing cardio into a strength-only template. YOUR TRAINING, IN NUMBERS Review workout history, volume, consistency, exercise progress, personal records, and useful trends across one month, six months, or a year—all calculated on your device. PRIVATE MEANS PRIVATE No account. No email. No ads. No analytics. No backend. Your profile, programs, history, and training data stay on your device. Moving Mass has no server copy and cannot see or collect them. Apple Health export is optional, write-only, and happens only when you choose to save a completed workout. Moving Mass never reads your Health data.

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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.