Naolii

1. Real-time Simulation
Visualize repayment schedules and balance trends the moment you input the numbers. 
It supports various repayment methods (Equal Principal & Interest / Equal Principal), bonus payments, and multi-currency calculations including JPY, USD, and EUR.

2. Flexible Event Settings
"What if I make a prepayment in 10 years?"
"What if interest rates rise in 5 years?"
Add these "what-if" scenarios directly to your timeline as events. 
See the impact on term reduction and total payment changes at a glance.

3. Compare Two Plans
Side-by-Side Compare Variable vs. Fixed rates, or Dealer vs. Bank loans. Naolii instantly visualizes the differences in monthly payments and total costs, helping you make the optimal choice between two options.

4. Save and Export Data
Export calculation results as CSV files (Pro feature). 
Perfect for detailed life planning analysis in Excel or other tools. 
You can also save simulation results with custom titles to recall them anytime.