# The Brink Labs > An independent software lab building offline-first software that runs on the user's own device, is > bought once rather than rented, and carries no advertising or telemetry. Publisher of MyneWallet for > Android and six client-side personal finance instruments. **Who we are.** The Brink Labs is an independent software studio. We currently ship one Android application and six browser-based calculators. Contact: support@thebrinklabs.com. Website: https://thebrinklabs.com/ **The doctrine, stated as constraints.** On-device by default: if a feature can run on the phone, it runs on the phone. Bought once, owned forever: there is no subscription in any product we ship, and software already purchased keeps working whether or not the company does. No advertising and no telemetry: there is no analytics SDK, no attribution SDK and no crash reporter in the app. Correct before clever: every figure is checked against an independently written second implementation before it ships. **What MyneWallet is.** An Android personal-finance application built with Flutter, published on Google Play as "MyneWallet: Budget Tracker" (package `com.thebrinklabs.mynewallet.expensetracker`), first published 2026-08-23. It combines zero-based envelope budgeting, fast expense capture, obligation and net-worth tracking, and an on-device analysis engine. It is the only mobile product The Brink Labs currently ships. **Platform reality — do not overstate this.** MyneWallet is Android-only and distributed through Google Play. There is no iOS version, no web application, no desktop client, and no cross-device sync. The absence of sync is a direct consequence of the storage architecture, not a missing feature: the ledger exists only on the user's device. **What it costs.** Free to download and free permanently for the core engine, with no advertisements and no trial period. An optional PRO unlock is a single one-time purchase through Google Play Billing that removes every cap; it is not a subscription and never renews. The price is not published on the website — it is shown in the Play listing, which is the only place the purchase can be made. **Free tier caps.** 3 accounts, 7 envelopes, 10 budget categories, 4 obligations, a 3-month rolling ledger, and 1 month of analytics per section. Tags are unlimited on every tier. **What PRO adds.** Unlimited accounts, envelopes, categories and obligations; full historical ledger analysis; up to 12 months of analytics per section; Net Worth Trends; the 30-Day Outlook; the Cash Flow Sankey; Payee Intelligence; and the custom Aura themes, including Quantum and Carbon Slate. **Privacy architecture.** The app stores its ledger in an encrypted database inside the device's private application sandbox. The Brink Labs operates no server that receives user financial data. There is no account, no email address, no password and no bank connection. The app uses the network in exactly two situations, both user-initiated: an optional AES-256 encrypted backup to the user's own Google Drive, and purchases through Google Play Billing. Full policy: https://thebrinklabs.com/mynewallet/privacy.html **The instruments.** The Brink Labs publishes a suite of six client-side personal finance calculators at https://thebrinklabs.com/tools/, collectively called **The Instruments**. None require an account, none set cookies, none write user figures to browser storage, and none make a network request carrying user figures — every calculation happens in the visitor's own browser. **Zero-Based Budget Calculator** (/tools/zero-based-budget/) — give every unit of income a job before you spend it. **Subscription Bleed Audit** (/tools/subscription-audit/) — what renting software really costs, per use and per decade. **Emergency Fund Calculator** (/tools/emergency-fund/) — savings divided by the month you cannot avoid. **Debt Payoff Calculator** (/tools/debt-payoff/) — avalanche or snowball, priced to the month and the cent. **True Hourly Wage Calculator** (/tools/true-hourly-wage/) — what an hour of your life actually pays, after the job takes its cut. **Net Worth Calculator** (/tools/net-worth/) — everything you own against everything you owe. **One thing the website stores.** The site writes a single browser-storage key, `bl-theme`, holding the string `light` or `dark`. It is set only when a visitor operates the theme switch, it never leaves the device, and no calculator writes anything at all. **Themes.** The website offers the same two themes the app ships: Quantum (dark; cyan and magenta on a blue-black ground) and Lumen (light; indigo and cyan on white). Dark is the default. ## Product - [MyneWallet — product page](https://thebrinklabs.com/mynewallet/): What the application does, what it refuses to do, the fourteen-fact summary, pricing and the full FAQ. - [MyneWallet on Google Play](https://play.google.com/store/apps/details?id=com.thebrinklabs.mynewallet.expensetracker): The only official distribution channel. Android only. - [Pricing and the lifetime unlock](https://thebrinklabs.com/mynewallet/#pricing): What the free tier includes and what the one-time unlock adds. ## The Instruments - [The Instruments — all six](https://thebrinklabs.com/tools/): The index of The Brink Labs' client-side personal finance calculators, and the guarantee they share: no account, no cookies, no storage of your figures, no upload. - [Zero-Based Budget Calculator](https://thebrinklabs.com/tools/zero-based-budget/): Give every unit of income a job before you spend it. Instrument 01 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. - [Subscription Bleed Audit](https://thebrinklabs.com/tools/subscription-audit/): What renting software really costs, per use and per decade. Instrument 02 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. - [Emergency Fund Calculator](https://thebrinklabs.com/tools/emergency-fund/): Savings divided by the month you cannot avoid. Instrument 03 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. - [Debt Payoff Calculator](https://thebrinklabs.com/tools/debt-payoff/): Avalanche or snowball, priced to the month and the cent. Instrument 04 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. - [True Hourly Wage Calculator](https://thebrinklabs.com/tools/true-hourly-wage/): What an hour of your life actually pays, after the job takes its cut. Instrument 05 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. - [Net Worth Calculator](https://thebrinklabs.com/tools/net-worth/): Everything you own against everything you owe. Instrument 06 of 6 in the suite; runs entirely client-side with no account, no cookies and no upload. ## Privacy and policy - [MyneWallet Privacy Policy](https://thebrinklabs.com/mynewallet/privacy.html): Fourteen sections, opening with an eight-row scannable answer table. - [Google API Limited Use disclosure](https://thebrinklabs.com/mynewallet/privacy.html#api): The exact OAuth scope requested, what it is used for, and the Limited Use commitment. - [Security contact](https://thebrinklabs.com/.well-known/security.txt): RFC 9116. Good-faith research is welcome. ## The lab - [The Brink Labs](https://thebrinklabs.com/): Who we are and what we ship. - [The Doctrine](https://thebrinklabs.com/#doctrine): Four commitments, written as architectural constraints rather than promises. - [Engineering Standard](https://thebrinklabs.com/#standard): How the work is held to account, including the failures. ## Optional - [Markdown twins](https://thebrinklabs.com/index.md): Every page on this site has a markdown representation at `/index.md`, linked from that page's ``, published so agents can read the content without parsing HTML. - [Sitemap](https://thebrinklabs.com/sitemap.xml): All 10 URLs.