Whether you want more options like Statistics Calculator+++ or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.
This app faithfully recreates the 1975 HP-21 pocket scientific calculator, offering RPN functionality and a full suite of mathematical, trigonometric, and logarithmic functions. It features a 10-digit LED display, stack and storage registers, and a keystroke log for detailed operation tracking.
This app offers a comprehensive suite of 10 powerful calculators, including standard, scientific, graphing, and financial tools. It provides over 3000 unit conversions and daily currency updates, making it suitable for students and professionals alike for everyday calculations and complex financial tasks.
What We Love
🚀 Best Calc App Ever!
👍 Excellent and versatile
👍 Extremely useful
👍 Fantastic app
Room to Improve
🐛 Stopped working/redownloaded/demands payment again
🐛 now just crashes on both ipad and iphone hasn't been updated in years
This scientific calculator offers advanced functions for academic, scientific, and engineering needs. It supports basic arithmetic, memory storage, statistical calculations, and various mathematical functions. The interface mimics a popular Casio model for ease of use.