Calculate elapsed time between dates and count down to important events. View past calculations and customize settings like dark mode and language. More language support is planned for future updates.




46+ similar apps compared and reviewed
Whether you want more options like Standard Atmosphere 1976 or a completely different take on the same concept, our curated list of 46+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.










Calculate elapsed time between dates and count down to important events. View past calculations and customize settings like dark mode and language. More language support is planned for future updates.





This app offers a suite of aviation-specific calculation tools for pilots of all levels. It simplifies complex flight planning and in-flight adjustments with features like unit conversion, wind component calculation, and descent rate planning. Enhance your flight efficiency and safety with these essential tools.


Generate various selective calling tones for communication. Choose from over 20 tone types, queue multiple tones for burst transmission, and customize tone durations and gaps. Store frequently used sequences for quick access.


This aviation calculator provides essential flight calculations for pilots, from preflight planning to in-flight decisions. It offers instant results for density altitude, runway wind components, and navigation planning, with a dashboard for all flight parameters.


This tool helps you properly size power generators and lighting towers. It features a new module for recommending ideal generator and energy storage combinations, simulating performance, and calculating cost savings. It also includes wire sizing and noise level measurement functionalities.


Explore and learn about scientific phenomena through interactive microworlds. Create your own simulations using text or blocks, and engage with a global community of young learners. Discover over 100 scientific models and create computational art and games.




This app helps you track daily, weekly, and monthly goals and habits with a simple notepad interface. It displays key dates and allows for SNS sharing and customizable font sizes. Navigate through days easily with swipe gestures.

