Try itI vibe coded my way to the Nirvana of personal finance apps.
An app you own. No more monthly subscriptions or ads cluttering your experience. Make it fully yours. Connect it to Grok and you've got a personal finance coach. A seamless experience on a platform you control.
Built with Grok, for GrokSleek design, real depth
Clean, detailed screens built by Grok 4.7, made to work with Grok.
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Modern, robust code built by Grok 4.7 from the ground up, and Grok guides you through setup. Clean screens, careful charts and real detail on every page: far more depth than the usual money app. And it’s built to work with Grok, so Grok can analyze your finances and give you personalized insight.
The whole app, live on this page
Tap around: Home, Activity, Budgets, Goals and Wealth.
The deepest page in the app: sleek charts that show where every goal stands today and project it forward, so you can see your progress over time and when you’ll get there.
Split a purchase across categories, set budgets that fit how you actually spend, and make merchant rules that file things for you. Flexible and detailed, but simple to find your way around and easy to manage.
He’s your coach inside Grok, so he can give simple coaching or deep financial analysis.
Installs on your phone like an app, straight from the browser, with a proper home-screen icon.
Three steps, guided by Grok
About half an hour, start to finish.
Buy it
One payment of $50. No subscription, no ads, ever.
Paste one message into Grok
After checkout you get one message with your private download link. Paste it into Grok: it downloads Liněn and sets it up on your own private server, on a free Vercel account, behind a password you choose. No GitHub account needed.
Add it to your phone
Save it to your home screen. When you’re ready, Grok’s native connectors link your accounts through Plaid, and your real numbers appear.
Why Grok makes it betterA money app that knows you
A coach that reads your real numbers, and a finished app that adapts to you.
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Most finance apps are the same for everyone. Set up through Grok, Liněn is yours, and it has someone to talk to.
Marcus, your coach in Grok, looks at your actual balances and spending, not averages, and tells you what matters this week.
Ask “can I afford the trip in March?” or “why was September so high?” and get a straight answer.
“Add a goal for a new car.” “Make dining its own budget.” Grok makes the change for you.
Your coaching updates weekly, so the advice keeps up with your life.
- Monthly fee or ads
- Same screens for everyone
- Your data lives on their servers
- Pay once, it's yours
- Finished, and adapts to you
- Runs on a place you control
Things you can ask GrokJust ask
Everyday questions, deeper analysis, and app customizations.
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Grok reads the app and your numbers, so you get real answers about your money. It looks; it never moves money.
What you’re gettingDeep analysis, sleek charts, and a coach
What other money apps don’t have: real analysis, clear visuals, and Marcus inside Grok.
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I spent 50+ hours and about $500 in AI token costs building Liněn. Here’s what that bought you.
Your spending, goals and wealth looked at carefully, with patterns, projections and where you’re concentrated.
That analysis shows up in polished charts and graphs, not a cluttered screen.
Grok keeps his memory of your goals and progress up to date, so his coaching gets more personal over time.
Home, Activity, Budgets, Goals and Wealth, one message to paste into Grok for your own private, password-protected server, and a phone install guide.
Features you won’t find anywhere else
Goal rings with Marcus’s notes on what to focus on, how to save, and money tips, updating as your numbers change.
Set monthly limits from last month or your 3-month, 6-month or 1-year average, and add your own categories.
One Rules page lists your merchant rules, this-charge edits and splits; change a rule’s category, apply it to past charges or only from today on, or remove any of them.
Recategorize just one charge, this and future charges from a merchant, or all of them past and future, or split one charge across categories.
Short tips for new users, off with one switch.
Where your net worth, each goal and each account are headed, plus What if rows showing how saving more changes the outcome.
Spending detail, recurring charges, retirement and investing, and tax notes.
Concrete steps from Marcus you can check off; they reset with his next update.
A holdings chart with suggested limits on concentration and speculative picks.
Monthly or quarterly, paging back through your history.
You choose when it asks: immediately, after 5 or 15 minutes away, or off, like a bank app.
Password protected, and your data isn’t sold or shared.
Budgets and rules sync to your own server automatically; export or import a copy anytime.
Warm, clean and sleek charts, with no ads or upsells.
Simple, one time
Every screen, Marcus the coach, and guided setup with Grok.
QuestionsGood to know
Bank connections, and how setup works.
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Yes, when you’re ready. Grok’s native connectors link your accounts through Plaid, and Liněn reads your balances and transactions from there.
How does setup work?Grok walks you through it in a few steps. You paste one message into Grok, and it sets up Liněn on your own private, password-protected server, free.
For the curiousTechnical details
TypeScript 5.9, React 19, TanStack Start 1.168 (Router, Query), Vite 8 with a Nitro server build, Tailwind CSS 4, Recharts 2 and Zustand 5.
Free on your own Vercel account (the Hobby plan, which allows personal use). Grok runs the build and deploy for you, the same way mine runs. Prefer Cloudflare? It also builds for Cloudflare Pages on the free plan, protected with Cloudflare Access (free for up to 50 users).
Private and password protected: a built-in login screen runs in front of every page and file. You choose the password and type it straight into Vercel’s settings, never into the chat. Until a password is set, the site stays locked rather than public.
Your numbers are in one file, my-snapshot.ts, on your computer (git-ignored) and on your own password-protected site. Budgets, category changes and rules are saved on your phone in local storage. No analytics; the only outside request is Google Fonts for the typefaces.
Grok’s native Finance connector links your banks, cards and brokerages through Plaid. When you say “sync,” Grok reads them (read-only, it never moves money), saves the results, and an import script merges them into my-snapshot.ts, keeping your history and updating balances. Then it rebuilds and redeploys. Weekly works well; it isn’t a live feed.
Marcus’s goals, plan and weekly notes live in coaching.json. Grok rewrites it from your numbers when you ask.
An installable web app (PWA) with a manifest and home-screen icons, set up with the iPhone (Safari) and Android (Chrome) guide. There’s no service worker, so it needs a connection to open; once open, the last snapshot is kept on the phone.
After checkout you get one message to paste into Grok, with a private download link (a zip). Grok fetches it, sets it up and deploys it to your own Vercel site. No GitHub account needed; a GitHub invite is available if you’d rather work from the repository. Your copy is yours after that: changes reach your phone when Grok rebuilds and redeploys, and you close and reopen the app to see them.
45 unit tests cover splits, category rules, undo, label precedence, goals and the password login (npm test).
Back up my-snapshot.ts and the finance-import folder; those are your data. Phone-only settings stay on that phone, with no export button yet.
Personal or single-project use. Change anything you like; just don’t resell or redistribute it.
Clean money ~ clean life