
NoteCalc is the most popular Self-Hosted alternative to Omni Calculator.
- NoteCalc is Free and Open Source
Omni Calculator is described as 'Web/mobile calculator that solves concrete problems such as mortgage payment, gross margin, body mass index, break-even point, etc. It's very user-friendly, flexible and usable on web, mobile and as an embeddable web widget' and is a Calculator in the education & reference category. There are more than 100 alternatives to Omni Calculator for a variety of platforms, including Android, Windows, Web-based, iPhone and Mac apps. The best Omni Calculator alternative is Wolfram Alpha, which is free. Other great apps like Omni Calculator are SpeedCrunch, Fossify Calculator, Qalculate! and OpenCalc.

NoteCalc is the most popular Self-Hosted alternative to Omni Calculator.
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