# My Physics Calculator vs ObsidianIOT

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.

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.

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.

My Physics Calculator ships an update every 12 months, ObsidianIOT every 6 weeks. Both last shipped on November 4, 2026.

## The numbers

| Metric | My Physics Calculator | ObsidianIOT |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.3 (44 ratings)](https://appshunter.io/ios/app/my-physics-calculator/id827404220/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/obsidianiot/id6608989458/reviews)** |
| Number of ratings | **44** | 2 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 weeks** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 7 MB |
| Requires iOS | **16.6** | 17.5 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Andre Troncoso](https://appshunter.io/developer/1761218015) |

## What reviewers say

### My Physics Calculator

[App page](https://appshunter.io/ios/app/my-physics-calculator/id827404220)

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:** Vision Pro support

**In-app purchases:** none


### ObsidianIOT

[App page](https://appshunter.io/ios/app/obsidianiot/id6608989458)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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 November 4, 2026 and ObsidianIOT on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*