Perform multiple calculations simultaneously with three independent tabs. Easily switch between calculations, track history, and copy/paste results. Ideal for managing estimates, invoices, and everyday math tasks without ads or account creation.



10+ similar apps compared and reviewed
Whether you want more options like ZoneClock 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.















Perform multiple calculations simultaneously with three independent tabs. Easily switch between calculations, track history, and copy/paste results. Ideal for managing estimates, invoices, and everyday math tasks without ads or account creation.






This app helps you visualize your remaining time by calculating days lived and days left based on your birthday and expected lifespan. It offers a deep space theme, extensive iOS widgets, and prioritizes user privacy with local data storage. All core features are free to use.




Enhance your browsing experience by blocking ads, saving battery life, and reducing data consumption. Simply enable the content blocker in your device settings for a faster, more comfortable online experience.


Detects imperceptible light flicker from various sources like screens and bulbs that can cause eye strain. Offers detailed metrics, ambient light and color temperature estimates, and generates exportable reports. Prioritizes user privacy with offline functionality and no ads.


This app converts a wide range of file types, including images, documents, videos, and audio, directly on your device. It offers batch conversion, adjustable quality settings, and a preview feature. Image conversions are free, with a one-time purchase to unlock additional formats.