Thunder Wallet is the free offline expense manager and budget tracker for Android. Track spending, filter entries by date and amount, import or export CSV, manage bills, and back up your data locally — no account, no cloud, no ads.
Thunder Wallet is a free, open-source offline expense manager and budget tracker for Android, built by Tejas Mane. It is designed for people who want full control of their money without creating an account or syncing personal finance data to the cloud.
With Thunder Wallet you can log income and expenses, filter transactions by date and amount, import or export CSV, set monthly and per-category budgets, track recurring bills, store payment cards in a biometric SecureStore vault, view spending analytics, export PDF reports, and back up wallet data locally — all on your device.
Thunder Wallet is not a cryptocurrency or Lightning Network wallet. It is a personal finance / expense tracking app. Download the official Thunder Wallet APK from GitHub Releases or visit the project at github.com/iamtejas23/thunder-wallet.
Thunder Wallet packs intentional finance tools into six focused screens — dashboard, activity, bills, cards, analytics, and settings — without bloat, accounts, or ads.
Every screen is dark-first, data-dense, and built for speed. No clutter, no wasted space.
Card data is protected by the same hardware security that protects your fingerprints. Not encryption you wrote — the chip you were born with.
No sign-up. No form filling. Install and start. It's that simple.
Thunder Wallet is fully open source under the MIT license. Read the code, fork it, learn from it, contribute. Built with React Native + Expo — the full stack is readable and hackable.
Everything you need to know about Thunder Wallet — the free offline expense manager for Android.
Thunder Wallet is a free offline expense manager and budget tracker for Android, built by Tejas Mane. Track daily expenses, edit recurring bills, store cards securely on-device, set budgets, and view analytics — with no account, no cloud sync, and no ads. Official site: thunder.cloudgrains.com.
Yes — Thunder Wallet is 100% free. No subscriptions, no in-app purchases, no ads, ever. It is also open source under the MIT license.
Yes. Thunder Wallet is a fully offline-first budget app. All expenses, bills, cards, and budgets are stored locally on your device using Android Keystore and AsyncStorage. No internet connection is ever required to record or view transactions.
Tap + for income or − for expense on the Home screen, pick a category (Food, Fuel, Savings, Shopping, Health, etc.), enter the amount and an optional note, then tap Save. Your running balance updates instantly. The monthly summary and category breakdown update automatically on the Analytics screen.
Yes. In Activity, combine search and income or expense filters with a date range and minimum or maximum amount. The transaction list and summary totals update to match your filters.
Yes. Export the transactions currently shown in Activity as CSV, or import a CSV with date and amount columns. Before import, Thunder Wallet previews the rows and possible duplicates. You can skip possible matches or import all rows; existing transactions are kept.
Your card numbers and CVVs are stored in SecureStore and loaded only after biometric / device-passcode unlock. Viewing, editing, or deleting a card requires authentication. Screenshots are blocked on the Cards tab, and copied details auto-clear from the clipboard. Your app PIN is also in SecureStore, with lockout after failed attempts. Nothing is ever uploaded to a server.
Yes. The Bills screen lets you add and edit recurring bills — Netflix, Jio, Rent, Electricity, and more — with brand icons. Choose monthly, quarterly, yearly, or a custom day-based cycle (e.g. every 15 days). You receive a local notification one day before and again on the due date. Tapping Pay automatically logs the expense transaction, keeping your balance accurate.
Yes. Settings exports a JSON backup of transactions, budgets, bills, goals, and savings. Restore validates and previews the file before replacing wallet data. Card details and your PIN are excluded. Save the backup somewhere you control; it contains your wallet records.
The Analytics tab includes: an interactive donut chart by category, a day-of-week spending heatmap, current month vs. last month comparison bars, a top-5 biggest expenses list, a What-If spending simulator, and a Financial Health Score from 0–100 that grades your saving and spending habits.
Yes. One tap on the PDF Export button generates a full financial report — all-time summary, current month breakdown with category bars, and the complete transaction table. You can share it or save it to your device.
Most expense trackers sync to the cloud, require account sign-up, show ads, or lock features behind a paywall. Thunder Wallet stores data on your device, requires no account, has zero ads, and includes day-based bills, local backup & restore, transaction filters, CSV import/export, a What-If simulator, savings goals, a financial health score, and PDF export — all free and open source.
Download the APK directly from GitHub Releases. Enable "Install unknown apps" in your Android settings (Settings → Apps → Special app access), open the downloaded APK, and tap Install. No Play Store account needed.
Thunder Wallet requires Android 10 (API 29) or newer. It is built with React Native 0.86 and Expo SDK 57, with support for Android's New Architecture.
No. Thunder Wallet by Tejas Mane (thunder.cloudgrains.com) is an offline expense manager and budget tracker for Android. It is not a cryptocurrency or Lightning Network wallet.