Apps Like O2 Duration for iPhone and iPad
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Ranked alternatives
Showing 101–120 of 1,000 ranked alternatives.



Spool Ethanol Analyzer
Ajay Rajeev
Connect to sensor, analyze content and temperature
Connects to Wireless Sensor Kit or Handheld to measure content and fuel temperature. Displays real-time data via Bluetooth. Includes mixing ratio calculator for fuel blends. Functions without the sensor kit.

Hydraulic Calculator Engineer
Arsosa Network Inc.
Calculate cylinder force and pressure automatically
Allows users to input values for cylinder calculations, power, pressure difference, piston diameter, speed, lifting time, and volume flow. The automatically computes results without requiring manual formulas.




Elements & Periodic Table Quiz
Andrey Solovyev
Learn and symbols with quizzes
Learn chemical element names and symbols through interactive quizzes. Test knowledge of basic , advanced , or all from hydrogen to oganesson. Practice identifying atomic numbers with dedicated quizzes. Track progress and review answers for each .




Chemyst
Daniel Medeiros
Mix elements, create reactions, watch explode
Create chemical mixtures by combining up to four elements in a beaker. React elements to form new compounds and molecules. Learn about basic chemicals like carbon, hydrogen, and oxygen. Progress through increasingly complex mixtures and reactions.






Altimeter Pro - Altitude & Map
海英 王
Measure , track air pressure, customize themes
Measure in real time using GPS and sensor data with less than 3-meter error. Track air pressure and oxygen concentration. Customize themes for personalized backgrounds.


Aviation Fuel Converter
Jay Ferguson
Convert units and track amounts
Convert Jet A or 100LL between US gallons, pounds, liters, and kilograms. Enter type, units, remaining amount, and desired amount for accurate conversion. Adjust and save specific gravity and conversion factors.
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