This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.
Rule of Three Calculator by Saran Dumronggittigule


16+ similar apps compared and reviewed
Whether you want more options like NWT Water Operator or a completely different take on the same concept, our curated list of 16+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.


This utility app helps you solve problems involving ratios and proportions. It calculates an unknown number based on the relationship between two other known numbers.



This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.






Easily determine the capacity of structural steel beams and columns. Get detailed calculation sheets to verify your work, designed according to AISC 360-16 standards. Features intuitive touch-based interaction and built-in material databases.




This utility app provides an Inuktitut syllabic keyboard for iOS devices, making it easy to write in the language. It features color-coded keys, personalized word suggestions, and an existing word list for quick text entry.


This app offers guided meditation and mindfulness sessions to help users find peace, reduce anxiety, and manage stress. It aims to improve sleep quality through expert-crafted content, supporting your mental well-being.


This AI-powered tool helps skilled tradesmen quickly find and understand electrical codes and requirements. It offers real-time translation and up-to-date references for various standards, assisting with compliance and efficiency on the job.


Manage your water account conveniently from your mobile device. This app allows you to view your usage, make payments, and set up automatic billing. You can also schedule appointments and easily reach customer service.