Nestline

Nestline helps you plan your financial future with simple, powerful tools — all running entirely on your device. Model flexible investing scenarios with changing contributions, withdrawals, and growth rates across multiple periods. Nestline simulates compounding growth step-by-step and clearly separates what you invested from what you earned. Tools: • Simple Calculator — Quick investment projections with per-period contributions or withdrawals. • Pro Calculator — Advanced scenarios with contribution ramps, multiple frequencies, withdrawal strategies, and inflation adjustment. • Budget — Track income, taxes, deductions, and expenses to find your monthly surplus and estimate a portfolio target using the 4% rule. • Tax Estimator — Estimate federal income tax (US) with progressive bracket-by-bracket breakdowns for 2025 and 2026. Features: • Math expressions in any numeric field (e.g. 500+200) • Export results to CSV from any tool • Fully on-device — no accounts, no tracking • Designed for long-term financial clarity Nestline is for educational and planning purposes only.