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.
Subscriptions are easy to start—and even easier to forget.
$2.99 · 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.
Rork plan preview for Zentry: Subscription Tracker: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Subscriptions are easy to start—and even easier to forget. A free trial becomes a paid plan. A yearly renewal arrives without warning. A shared subscription continues long after everyone forgets who owes what. Zentry is a private subscription tracker, bill reminder, and budget planner that helps you organize recurring payments, monitor upcoming renewals, and understand your true spending. Track everything clearly. Get reminded before you are charged. Decide which subscriptions are still worth keeping. PRIVATE BY DESIGN. NO ACCOUNT REQUIRED. Your financial information should stay yours. • No account, email, or registration required • Your subscription data is stored locally on your device • No advertisements or personal-data harvesting • Protect your dashboard with Face ID or Touch ID • Open the app and start tracking immediately NEVER MISS ANOTHER RENEWAL See exactly when your next payment is due and receive reminders before money leaves your account. • Track subscriptions, memberships, bills, and free trials • Set reminders 1, 3, 5, or 7 days before renewal • View upcoming payments in one organized timeline • Monitor monthly, yearly, and custom billing cycles • Catch free trials before they become paid subscriptions UNDERSTAND YOUR REAL SPENDING Zentry helps you see how recurring payments affect your budget. • View your total monthly and yearly subscription costs • Identify services you may no longer use • Organize payments by category • Track personal and shared expenses accurately • See upcoming costs before they affect your budget SPLIT SHARED PLANS FAIRLY Sharing a family plan, streaming service, cloud storage, or software subscription? Zentry calculates your actual share so your spending totals remain accurate. • Split costs equally • Set custom percentages • Assign the full payment to another person • Track exactly how much you personally pay IMPORT SUBSCRIPTIONS FASTER Build your dashboard without entering everything manually. • Scan or upload receipts to capture subscription details • Import multiple subscriptions using CSV files • Import data exported from spreadsheets such as Google Sheets • Review imported information before saving it CALENDAR, CURRENCY, AND WIDGETS Keep important renewal information visible wherever you need it. • Sync upcoming renewals with Apple Calendar • Convert costs across 16 supported currencies • Track international software, services, and travel subscriptions • Add Home Screen widgets for quick renewal updates • See your next payment without opening the app PAY ONCE. OWN IT FOREVER. Zentry has no recurring app fee, advertisements, hidden paywalls, or additional in-app purchases. One purchase gives you: • Unlimited subscription tracking • Full access to every available feature • Receipt and CSV importing • Renewal reminders and calendar sync • Currency conversion and shared-plan calculations • Home Screen widgets • Future improvements included Take control of your recurring expenses with a subscription manager built for clarity, privacy, and peace of mind. Download Zentry today and never let another renewal surprise you.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Users often forget about upcoming subscription payments.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in managing multiple subscriptions at once.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of visualization for spending trends.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited customization for subscription details.
Validate with people who use this workflow before building.
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.