Instantly calculate air density and atmospheric properties with this offline engineering tool. Features three modes for density, reverse solving, and altitude estimation, with flexible unit support and calculation breakdown.
5.0(2 ratings)
$2.99
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4.0 avg rating
2 free apps
Updated July 2026
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This app helps musicians and sound engineers convert between musical notes, frequencies, and wavelengths. It features a dynamic fader, built-in oscillator, and frequency tracker with waveform display. Customize tuning standards and speed of sound for precise audio analysis.
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Lambda Tuner
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This tool helps tune PID controllers using the Lambda method to calculate P, I, and D parameters. It's designed for intuitive use in various process industries and works on self-regulating and integrating loops. You can also use it to learn the impact of different PID parameters.
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Alice Energy
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Manage your home's energy consumption, including solar panel output and electric vehicle charging. Optimize charging times for cost and environmental benefits, and gain insights into your energy usage and savings.
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Fluid Mechanics Calculator
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This app provides 97 calculators for fluid mechanics and civil engineering parameters. It supports both Imperial (USCS) and Metric (SI) units, offering automatic and accurate calculations with unit changes.
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Plutocalc+ Water
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This comprehensive engineering calculator suite offers over 100 solvers for water treatment, hydraulics, and environmental chemistry. It provides instant results with self-explanatory diagrams and internal databases, functioning completely offline. Available in multiple languages, it's designed for professionals needing precise calculations on the go.
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This app allows users to monitor and test the functionality of specific mobile payment devices. It supports various connection interfaces and enables simulated card capture transactions for testing purposes.
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