About AccurateCalculators.com

We released our first program as shareware for the new Apple IIe through a single store in March 1983. As you might have guessed, it was a loan calculator— it sold exactly zero copies.

Encouraged by such unbridled success, we developed a series of financial routines for the new IBM PC. These 22 routines were released in two parts in late 1984 as Finance I and Finance II. At the time, we had little money to market them, so sales were slow. We then used a shareware model to release them in late 1985. One disk vendor continued to distribute them until 1995. Around 1987, the routines were completely rewritten, combined into one program, and released as SolveIT!, The Financial Calculator v2.0. The program has been updated several times and has sold tens of thousands of copies. Bargains for Business, a feature in The New York Times, described SolveIT! as “surprisingly fast.” In 1992, it ranked as the 40th best-selling shareware title out of thousands, according to an independent survey of shareware disk vendors.

In 1990, we released a subset of the 32 calculators then included in SolveIT!. The new program, called AmortizeIT!, The Complete Loan Solution, included six calculators from the loan section of SolveIT!. Its last significant update was in 2010, and it was discontinued in 2023.

Loan*Calculator! Plus, our first program for Microsoft Windows, was released in 1995. In 1996, it received a “Best-of-Category Award” from PC Computing Magazine in the July 1996 issue. Lease*Calculator! Plus followed as an upgrade, adding three ca