iORA vs Calcsharp Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iORA
Visualize chemical reactions in 3D using quantum-mechanical simulations. This free, interactive application makes complex chemistry concepts accessible and engaging for learners.
- 3D chemical reaction visualization
- Quantum-mechanical simulations
- Interactive learning
- Easy to use interface
- Educational tool
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iORA is a free, easy to use, highly interactive smartphone application that provides 3D visualization of chemical reactions based on quantum-mechanical simulations.
Calcsharp Pro
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It uses a different approach from a conventional calculator, which is more natural to the way people calculate. When you calculate on a conventional calculator, each time you enter a new number you lose sight of the previous one. And if you make a mistake in the middle of a long expression, you have to start all over. In Calcsharp, you can see all of what you are calculating, and expressions can easily be edited and saved. Features: - Evaluate mathematical expressions step by step - Large number of built-in functions and operators - Large number of predefined mathematical and physical constants - Support for fractions - Supports for decimal, hexadecimal, octal and binary numbers - Works with "Infinity" and "Not-a-number" - Three kinds of parentheses - Unlimited size of expressions - Unlimited depth of nesting - Expression builder - Expression history - Three different chalkboard background (green, blue and black)
Screenshots
Verdict
The clearest difference is price: iORA at Free against Calcsharp Pro's $1.99. iORA also leads on iOS requirement (14.3 vs 16.0). Calcsharp Pro's advantage is update cadence (every 2 days vs every 2 months). On ads, in-app purchases and device support 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
iORA is free to download; Calcsharp Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
iORA ships an update every 2 months, Calcsharp Pro every 2 days. Both last shipped on October 9, 2026.
| Parameter | iORA | Calcsharp Pro |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (12 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 14.3 — better | 16.0 |
| Further details — not scored | ||
| Size | 40 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Ess | Nikola Stepan |
In-app purchases
iORA
No in-app purchases
Calcsharp Pro
No in-app purchases
