Nest is a privacy-first offline budgeting app and secure expense tracker. Instantly log spending without bank links, negotiate split bills offline with friends, and manage travel budgets globally with automatic currency conversions.

Track your spending on subways, flights, or remote hikes. The app opens in an instant and saves everything locally, syncing automatically when you have signal.
Split dinner bills or trip expenses with ease. Friends can propose adjustments right inside the app, letting you approve changes with a tap—no awkward discussions.
Shop or travel globally and enter transactions in local currency. Nest handles conversion to your home budget automatically using real-time rates.
When one budget period ends, Nest keeps showing your recent spending habits so you stay aware and motivated while setting up your next goals.
Spotted a mistake in a past month? Simply navigate back and fix it. Updates are applied instantly, while keeping the app fast and lightweight.
Actively building and updating cool new budgeting features to help you master your finance goals.
Start completely free with zero friction. Upgrade to Premium to unlock unlimited friends, real-time sync, and international currency conversions.
| Feature | Free | Premium |
|---|---|---|
Cloud Sync & Backup Keep your data secure and accessible across all your devices. | Local-only storage | Real-time background cloud sync |
Friends Limit Add friends to split meals, trips, or shared expenses. | Up to 2 friends | Unlimited friends |
Bill Split Negotiations Propose splits and let friends counter-offer directly in the app. | Local draft calculator only | Live sync & direct counter-offers |
Multi-Currency Magic Spend abroad and automatically convert split shares using live rates. | Manual conversion helper | Live exchange rates & auto-converting splits |
Budget History & Archive Look back at past spending cycles to trace habits and edit errors. | Active cycle only | Unlimited past cycles with full edit access |
Always-On Dashboard Avoid blank screens when transition periods end. | Empty screen between cycles | Fallback to last completed cycle insights |
Find immediate answers regarding data structures, device synchronization, and billing.
Welcome to Nest (the "App"). By downloading, installing, or using the App, you agree to be bound by these Terms of Use. 1. DATA & PRIVACY Nest is an offline-first application. Your budget data is stored locally on your device in a secure cache. If you choose to enable cloud synchronization, your data will be transmitted and stored in our secure database. We do not sell or share your financial data with third parties. 2. SERVICE LIMITATIONS We provide the App on an "as-is" and "as-available" basis. While we strive for 100% database consistency, we are not responsible for any data loss resulting from device hardware failure, operating system conflicts, or database synchronization anomalies. 3. ACCEPTABLE USE You agree to use the App only for lawful, personal financial tracking. You must not attempt to reverse-engineer, modify, or disrupt the App's background sync and API systems. 4. AMENDMENTS We reserve the right to modify these terms at any time. Your continued use of the App following any updates constitutes acceptance of the new terms.