Foundation Base
Production readyFinancev1.0.0 · updated Jul 2, 2026
SU

Open Source Subscription Tracker Template

Find the quiet leaks in your monthly spending.

Track every recurring charge, see your true monthly burn, and catch renewals before they catch you.

Runnable Agent-ready Install-ready Deploy-ready
foundationbase.app/demo/subscription-trackerOpen full demo →

This is the real app, not a mockup. Whatever you enter in the demo stays in your browser and belongs to nobody.

What you get

One zip. Everything to own it.

Subscription Tracker lists every recurring charge with its price, cadence, and next renewal. Yearly plans are normalized into monthly cost so the burn number is honest, and the upcoming view surfaces anything renewing soon — the moment you're most likely to finally cancel it.

  • Monthly and yearly cadences
  • True monthly burn (yearly plans normalized)
  • Upcoming renewals within 30 days
  • One-click cancel from the list
  • Mark-renewed advances the next date
subscription-tracker.zipMIT
subscription-tracker/├── app/the running Next.js app├── agent/START_HERE, PROJECT_MAP, RULES, RECIPES, TESTS, DEPLOY├── CLAUDE.mdread automatically by Claude Code├── AGENTS.mdread automatically by Codex├── .cursor/rules/loaded automatically by Cursor└── README.mdrun it, then make it yours

Inside the app

What the running app actually looks like
Subscription Tracker: The full list
The full list — Every recurring charge, sorted by cost.

Customize with AI

Your agent already knows this codebase.

Ships with CLAUDE.md, AGENTS.md, Cursor rules, and a full agent handbook — project map, safety rules, recipes, tests, and deploy notes.

Claude CodeCursorCodex

Prompts written against this app

Add custom renewal reminder windows for each subscription.
Add categories and monthly burn charts by category.
Add a cancellation notes field and export my subscription list.
Change the currency and billing cadence rules for my country.

Run it

5 min to your own copy.

  1. 01Create your editable app copy and unzip it.
  2. 02Run npm install.
  3. 03Run npm run dev and open http://localhost:3000.
  4. 04Read /agent/START_HERE.md before customizing.
  5. 05Swap the local-first storage boundary for your own backend when ready.
Full walkthrough, including deploy and install →
Where your data lives

Subscription records stay in this browser by default.

No account, backend, billing connection, or cloud sync is included in the current package.

An agent can add optional reminders or sync later while preserving local-first storage.

Honest limitation

This package is standard-ready for Create My App and AI customization.

A full app-only PWA install route is not enabled yet for this app.

Verification receiptchecked Aug 2, 2026 at c11c184 · v1.0.0
Demo renderscaptured 2026-07-26, 41 KBpassed
Package installs and buildsinstalled, typechecked and built in 191s on node v24.13.0passed
Source package complete31 files, 60 KBpassed
Agent instructions included5 handoff files presentpassed
No network calls in app sourcestatic scan clean: no network calls, eval, or secrets in app sourcepassed
License matches the packageMIT, matching the file in the packagepassed

If this isn’t quite right

All Finance foundations →
finance · 5 min setupExpense TrackerA fast expense logger with categories, a monthly budget, and a breakdown that shows exactly where the money went.finance · 5 min setupInvoice & EstimatesA billing document foundation for estimates, invoices, client approval, payment links, and clean PDF output.crm · 5 min setupPersonal CRMA private CRM foundation for people, conversations, reminders, notes, and lightweight relationship history.
How To Use Foundation BaseHow To Customize An App With AiDemo Link Vs Preview Link Vs App LinkHow To Deploy Your Own App LinkOpen Source App Templates

Take Subscription Tracker and make it yours.

Free, MIT, 5 min to running. The demo above is exactly what lands in your folder.

Create My AppTry demo
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