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Offline-First Expense Tracker

Track spending anywhere. Split bills with zero friction.

Nest β€” Spending Tracker

The modern, privacy-first personal finance app. No bank logins required, 100% offline capability, and conflict-free bill splitting with friends.

100% Local

Privacy

0 Required

Bank Logins

170+ Live

Currencies

Zero Lag

Offline Sync

Coming soonApp StoreGet it onGoogle Play
Nest - Spending Tracker app screenshot

See How It Works In The Wild

Real life happens on planes, in crowded restaurants, and across borders. Test three everyday scenarios below:

CURRENCY
Real-Time FX
πŸ—Ό

Instant Multi-Currency, Zero Guesswork

Pay in Japanese Yen, Euros, or Pounds. Nest converts to your home currency automatically at live ratesβ€”even while riding subterranean trains with zero signal.

Transaction in Tokyo

Β₯1,850 JPY (Ramen Dinner)

Auto-Converted Offline

Converted to Home Budget

$11.92 USD

Stored immediately to local disk Β· Live rate 1 USD = 155.20 JPY

Engineered for Daily Peace of Mind

Every interaction is tuned to eliminate friction, respect your privacy, and get out of your way.

⚑01

Instant Log, Zero Latency

Track spending on subways, flights, or remote trips. The app opens instantly, stores data locally on your device, and syncs seamlessly when connected.

Built-in capability
🀝02

Conflict-Free Bill Splitting

Split dinner bills or trip expenses in seconds. Friends can propose direct counter-adjustments inside the appβ€”accept with one tap, no awkward math.

Built-in capability
🌍03

Real-Time Multi-Currency Magic

Shop or travel across borders. Enter expenses in local currencies and Nest instantly converts them to your home budget using live rates.

Built-in capability
πŸ“Š04

Continuous Insights, No Blank Slate

When your monthly budget cycle resets, Nest keeps your recent spending insights active so you stay aware while setting new targets.

Built-in capability
✏️05

Effortless Historical Edits

Spotted a missed transaction from last month? Jump back, make edits, and watch your reports update in real-time with zero data corruption.

Built-in capability
πŸ›‘οΈ06

Bank-Grade Privacy & Encryption

Your financial life belongs to you. Zero bank credentials requested, zero data harvesting, and optional encrypted cloud backup.

Built-in capability

Why People Are Switching

You shouldn’t have to trade your financial privacy or battle clunky software just to track what you spend.

Bank Connection & Privacy

Constant disconnects, Plaid data breaches, requires your bank login & passwords.

100% bank-free. Zero passwords given away. All data stays local and encrypted on your device.

Speed & Signal Dependency

Spinning loading wheels on subways, flights, or crowded restaurant Wi-Fi.

Opens in milliseconds. Instant offline entry anywhere on Earth, auto-syncing in the background.

Splitting Shared Bills

Awkward spreadsheet calculations, passive-aggressive group texts, and forgotten Venmo requests.

One-tap in-app split adjustments. Friends counter-offer smoothly without awkward confrontation.

International Travel & FX

Manual currency conversion calculator apps and mental math errors.

Log in any foreign currency; Nest converts to your home budget automatically with live exchange rates.

Pricing & Lock-In

Expensive $12–$15/month subscriptions and aggressive upsell popups.

Free offline-first core forever. Transparent, affordable optional cloud sync.

Engineered For How You Actually Live

Whether you’re backpacking through Southeast Asia, splitting rent with roommates, or just want your financial data private.

✈️

Travelers & Digital Nomads

Never convert currencies in your head again.

Record local street food in Tokyo, train tickets in Berlin, or hostels in Bangkok. Works 100% offline at 35,000 feet and auto-converts to your home budget.

βœ“ Live rates across 170+ global currencies

🀝

Couples, Friends & Roommates

Split shared expenses without the dinner table debate.

Propose split ratios or adjustments directly in-app. Everyone stays in sync without downloading clunky third-party calculators or arguing over forgotten receipts.

βœ“ One-tap counter-offers & settlement

πŸ”’

Privacy & Security Purists

Your financial life belongs solely to you.

Tired of handing your bank username and password to data brokers? Nest requires zero bank links and stores your data encrypted locally on your device.

βœ“ Zero bank logins, zero analytics trackers

Pricing & Plans

Core features are 100% free and offline forever. Upgrade to Premium for real-time encrypted cloud sync and unlimited collaboration.

Cloud Sync & BackupKeep your data secure and accessible across all your devices.
FreeLocal-only storage
β˜… PremiumReal-time background cloud sync
Friends LimitAdd friends to split meals, trips, or shared expenses.
FreeUp to 2 friends
β˜… PremiumUnlimited friends
Bill Split NegotiationsPropose splits and let friends counter-offer directly in the app.
FreeLocal draft calculator only
β˜… PremiumLive sync & direct counter-offers
Multi-Currency MagicSpend abroad and automatically convert split shares using live rates.
FreeManual conversion helper
β˜… PremiumLive exchange rates & auto-converting splits
Budget History & ArchiveLook back at past spending cycles to trace habits and edit errors.
FreeActive cycle only
β˜… PremiumUnlimited past cycles with full edit access
Always-On DashboardAvoid blank screens when transition periods end.
FreeEmpty screen between cycles
β˜… PremiumFallback to last completed cycle insights
Ready to install

Start using Nest today

The modern, privacy-first personal finance app. No bank logins required, 100% offline capability, and conflict-free bill splitting with friends.

βœ“ 100% Freeβœ“ Zero bank credentialsβœ“ On Android
Coming soonApp StoreGet it onGoogle Play

Questions

01Can I track budgets and log expenses completely offline?

Yes. Nest is a fully offline-first app. You can record transactions, split bills, and check budgets with zero signal. Everything syncs safely when you are back online.

02How does the offline split bill negotiation work without awkwardness?

If a friend wants to adjust their share, they can send a direct counter-offer in the app. Once you approve it with one tap, everyone's budget updates automatically without awkward math.

03Is Nest a good travel expense tracker for foreign currency conversions?

Yes. Enter your purchase in any foreign currency and Nest instantly converts it to your home currency using live exchange rates, keeping your budget accurate while traveling.

04Does Nest help transition budget periods without losing insights?

Yes. Instead of showing an empty screen at the end of a month, Nest keeps displaying insights from your last completed cycle to help you transition into your next spending goal seamlessly.

05Can I manually edit past transactions and historical budgets?

Yes. You have full access to your past history. You can look back at any previous period, fix transaction errors, and keep your records perfect.

Support & Data Deletion

Have a question, feedback, or need to permanently delete your account and all associated data? Send an email to nest-contact@bynight.studio. All data deletion requests are permanently fulfilled within 7 business days.