With this simple tool you can quickly calculate how much (how big) a sum will become after invested for some years at a given interest. This is very useful if you own bonds and you want to calculate your income either if you reinvest the dividend or not this is also really useful for stocks with dividend distribution for oil and timber trusts for MLPs (master limited partnership) REITs (real estate investment trust) BDC (business development company) dividend ETF income oriented and high yield CEF treasurys and municipal fixed income securities and for anything that produce a fixed (or approx fix) interest or distribution income. You can compare the result with and without the reinvestment of the interest. This calculation is quite trivial but it is really boring to do without this automatic software that is useful for everybody is investing or willing to invest. Never understimate the power of the compound dividend see how to benefit from the magic of compounding with this simple free software.