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.
Modest Gains is a notebook for movement and food
$9.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Modest Gains is a notebook for movement and food. It records what you did, and leaves the judging to you. There are no calorie targets, no macro goals, no streaks to protect, no scores, and nothing telling you that today should have looked different. Workouts • Build a session from 200 illustrated exercises, or add your own. • Track whatever suits the movement: weight and reps, reps alone, sets and effort, or time. • Group exercises into circuits and supersets. • Change the plan mid-session - swap, skip, reorder, add a set. Real days do that. Food and water • Log breakfast, lunch, dinner and snacks from a growing catalogue of over 1,300 foods - groceries, restaurant items and supplements. • Add your own foods, and save meals you eat often. • Record water, and a short note about the day if you want one. Looking back • Personal bests per exercise, kept quietly, with the date each was first reached. • Open any past workout and see what you actually did. • Entries are snapshots. Nothing is silently rewritten later. NO ACCOUNT, NO CLOUD There is no sign-up, because there is no server. Modest Gains makes no network requests during use. Your notebook lives on your device, and nobody else can read it - including us. That comes with a trade worth knowing before you buy: your notebook will not appear on your other devices, and deleting the app can take it with you. You can save a copy to keep wherever you like, any time, from Settings. PAY ONCE One purchase. No subscription, no in-app purchases, no ads, and nothing held back to unlock later. Family Sharing is supported. A NOTE ON HEALTH Modest Gains is a notebook, not medical advice, and it will not tell you what to do with your body. Talk to your doctor before starting something new, especially if you have a medical condition, are pregnant, or have any concerns. Go at your own pace, and stop if something hurts.
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.