Comparison

My Physics Calculator vs ObsidianIOT

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

My Physics Calculator

This app offers a comprehensive suite of over 130 calculators for physics and engineering calculations. It provides clear formulas and definitions for each parameter, making complex calculations accessible with a simple interface.

Highlights
  • 130+ physics and engineering calculators
  • Includes formulas and definitions
  • Simple user interface
  • Mechanics & Motion calculations
  • Fluids & Thermodynamics calculations
  • Electrical & Circuit calculations
  • Projectile Motion calculations
Features
Read full description

My Physics Calculator features 134 calculators for various physics and engineering parameters. With a simple user interface, it provides formulas and definitions for each calculation. List of 134 Calculators: Mechanics & Motion: • Force • Kinetic Friction • Static Friction • Centripetal Force • Centripetal Acceleration • Gravitational Acceleration • Angular Acceleration • Work • Total Work • Power (Work-Based) • Power (Displacement-Based) • Power (Velocity-Based) • Displacement / Distance • Differential Pressure Fluids & Thermodynamics: • Density • Water Density • Kinematic Viscosity • Mass Flow Rate • Temperature • Thermal Conductivity • Thermal Diffusivity • Thermal Linear Expansion • Thermal Volumetric Expansion • Heat Flow • Heat Transfer Rate • Specific Heat Capacity Energy & Motion: • Kinetic Energy • Potential Energy • Elastic Potential Energy • Einstein’s Mass-Energy Equation • Gravitational Potential Velocity & Motion Laws: • Velocity • Circular Velocity • Average Velocity • Escape Velocity • Drift Velocity • Newton’s Law of Gravity • Newton’s Second Law of Motion • Archimedes’ Principle • Kepler’s Third Law • Hooke’s Law • Pascal’s Law • Poiseuille’s Law • Darcy’s Law • Stokes’ Law Engineering Numbers & Factors: • Souders-Brown Equation • Podmore Factor • Cavitation Number • Euler Number • Fourier Number • Knudsen Number • Mach Number • Nusselt Number • Reynolds Number • Weber Number • Froude Number • Prandtl Number • Schmidt Number • Brinell Hardness Number Doppler Effect Calculations: • Wavelength (Front & Behind) • Approaching Source • Receding Source • Approaching Receiver • Receding Receiver Projectile Motion: • Vertical Velocity • Vertical Displacement • Horizontal Displacement • Range Impulse, Momentum & Torque: • Impulse (Velocity-Based) • Impulse (Time-Based) • Momentum (Velocity-Based) • Momentum (Time-Based) • Moment • Torque • Moment of Inertia Engineering & Structural Calculations: • Transverse Strength • Standard Surface Factor • Rectangular Tank Capacity • Cylindrical Tank Capacity • Apparent Porosity • True Porosity Planetary & Seismic Calculations: • Seismic Geophone • Weight on Different Planets • Wenner Spacing (Soil Resistivity) • Luminosity of Stars Sound & Waves: • Sound Pressure Level • Sound Intensity Level • Sound Power Emitted • Sound Wavelength • Sound Speed • RMS Noise • Noise Pollution Level Oscillations & Springs: • Simple Pendulum • Physical Pendulum • Leaf Springs • Helical Spring Rate • Helical Spring Axial Deflection • Helical Spring Index Electrical & Circuit Calculations: • Inductive Reactance • Capacitive Reactance • Resonant Frequency • Inductor Sizing Equation • Capacitor Sizing Equation • Resistance • Battery Life • Battery Charge Time • kVA Calculation • Potentiometer • Voltage Divider • Electrodialysis • Electrical Harmonics • Horsepower • Ohm’s Law (Voltage, Power, Resistance, Current) Material Properties: • Shear Modulus • Bulk Modulus • Young’s Modulus • Stress • Strain

About

ObsidianIOT

This application optimizes solar energy systems, including trackers, battery storage, and street lights. It uses real-time data and predictive analytics for efficient energy management and remote monitoring.

Highlights
  • Real-time solar tracker adjustment
  • Intelligent solar battery management
  • Adaptive solar street lighting
  • Predictive analytics for energy optimization
  • Remote monitoring and control
  • Scalable architecture for various installations
Features
Read full description

Obsidian, as an IoT green technology solution, can play a significant role in controlling and optimizing solar tracker systems, solar battery storage, and solar street lights. Here's an expanded look at how this could be achieved: 1. Solar Trackers Real-Time Monitoring and Adjustment: Obsidian can be used to control solar trackers by leveraging real-time data such as sun position, weather conditions, and energy demand. It can adjust the angle of solar panels to maximize sunlight exposure throughout the day, increasing energy efficiency. Predictive Analytics: Using historical data and weather forecasts, Obsidian could predict the best positioning for solar panels in advance, ensuring that they are optimally aligned even before changes in sunlight occur. 2. Solar Battery Systems Intelligent Energy Management: Obsidian can manage the charging and discharging cycles of solar batteries by monitoring energy production and consumption patterns. This ensures that energy is stored when production is high and used efficiently when needed. Grid Interaction: The system could also facilitate smart interaction with the power grid, deciding when to draw energy from the grid or when to feed excess solar power back into it. This helps in balancing energy supply and demand while minimizing reliance on non-renewable energy sources. Health Monitoring: Obsidian can continuously monitor the health and performance of the battery system, predicting maintenance needs, and extending battery life by avoiding overcharging or deep discharging. 3. Solar Street Lights Adaptive Lighting: Obsidian can control solar street lights based on real-time environmental data, adjusting the brightness according to factors like ambient light levels, weather conditions, and human presence. This reduces energy consumption while ensuring safety. Remote Control and Monitoring: The system can offer remote control capabilities, allowing city planners or facility managers to monitor the status of solar street lights, detect faults, and manage lighting schedules from a central dashboard. Energy Optimization: By integrating with other IoT sensors (e.g., motion detectors), Obsidian can dynamically manage lighting, dimming or turning off lights in areas with no activity, and fully illuminating spaces only when needed. 4. Integration and Scalability Interconnected Ecosystem: Obsidian can create an interconnected ecosystem where all components (solar trackers, battery systems, and street lights) work together to optimize overall energy usage and efficiency. Scalable Architecture: Its modular and scalable nature allows it to be deployed in various settings, from small residential systems to large-scale industrial or municipal solar installations. 5. Environmental Impact Sustainability Reporting: Obsidian can collect and analyze data related to energy savings, carbon footprint reduction, and overall system efficiency, providing valuable insights and reports that can be used to demonstrate environmental benefits. Proactive Maintenance: By predicting potential issues and facilitating timely maintenance, Obsidian can reduce downtime and extend the lifespan of solar infrastructure, contributing to sustainability goals. By integrating Obsidian into solar technology systems, it becomes a powerful tool for enhancing the efficiency, reliability, and environmental impact of solar energy solutions.

Screenshots

My Physics Calculator4 screens
ObsidianIOT4 screens

Verdict

The call

The clearest difference is price: ObsidianIOT at Free against My Physics Calculator's $2.99. ObsidianIOT also leads on rating (5.0 vs 4.3) and update cadence (every 6 weeks vs every 12 months). My Physics Calculator's advantage is ratings volume (44 vs 2). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ObsidianIOT is free to download; My Physics Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ObsidianIOT holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: My Physics Calculator has 44 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

My Physics Calculator ships an update every 12 months, ObsidianIOT every 6 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
My Physics Calculator versus ObsidianIOT: the parameters behind the verdict, then further details
ParameterMy Physics CalculatorObsidianIOT
Price$2.99Free — better
Rating4.3 (44 ratings)5.0 (2 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings44 — better2
Update frequencyEvery 12 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.6 — better17.5
Further details — not scored
Size7 MB7 MB
Age rating4+4+
DeveloperV PUGAZHENTHIAndre Troncoso

Customer experience

My Physics Calculator

All ratings44 ratings
Positive81.8%
Neutral2.3%
Negative15.9%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

ObsidianIOT

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

My Physics Calculator

No in-app purchases

None

ObsidianIOT

No in-app purchases

Questions

Is My Physics Calculator free?
My Physics Calculator costs $2.99, with no in-app purchases.
Is ObsidianIOT free?
ObsidianIOT is free to download, with no in-app purchases.
Which has better reviews, My Physics Calculator or ObsidianIOT?
ObsidianIOT is rated higher. My Physics Calculator averages 4.3 out of 5 from 44 ratings, while ObsidianIOT averages 5.0 from 2 ratings.
Do My Physics Calculator or ObsidianIOT have ads?
Neither My Physics Calculator nor ObsidianIOT shows ads.
Which is updated more often, My Physics Calculator or ObsidianIOT?
My Physics Calculator ships an update every 12 months, and ObsidianIOT every 6 weeks. Most recently, My Physics Calculator was updated on October 28, 2026 and ObsidianIOT on October 24, 2026.

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