Clausius vs Napier's Bones Simulation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clausius
Visualize thermodynamic properties of water with an intuitive, interactive chart. Ideal for engineering students, it allows users to glide their finger across T-s, P-h, and P-v diagrams to instantly access data. This tool simplifies complex thermodynamic concepts for educational purposes.
- Interactive thermodynamic property charts
- Visual reference for water properties
- T-s, P-h, and P-v diagrams
- Intuitive finger-glide interface
- Suitable for engineering courses
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An intuitive visual reference for thermo. properties of water. Simply glide your finger across the chart to retrieve thermodynamic properties. Best suited for engineering courses. Charts include T-s, P-h and P-v diagrams for water. Acknowledgements. Dr. Matthias Gottschalk for providing water EOS algorithm in the superheated region and Austin Carrig for app development.
Napier's Bones Simulation
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John Napier's contribution to mathematics was truly significant. Born in Scotland, Napier studied as a mathematician, physicist and astronomer. He is best known as the inventor of logarithms, but he also invented one of the first computing devices. The device, known as Napier's Bones, is manually operated and can be used to find the products and quotients of numbers. Napier's device was based on Arab mathematics and used the lattice method of multiplication. Each of the rods are inscribed with the multiplication tables for a specific number. By arranging the rods on the board, the product of two numbers can be found by performing addition operations. Use the Napier's Bones app to learn how one of the earliest calculating devices worked. More than 400 years ago, people used Napier's Bones to find the product of large numbers. In using this simulation you will discover a new way to multiply. Have fun!
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Verdict
The clearest difference is price: Clausius at Free against Napier's Bones Simulation's $1.99. Clausius also leads on update cadence (every 8 months vs every 25 months). Napier's Bones Simulation's advantage is device support (4 vs 2) and iOS requirement (12.0 vs 15.4). On ads and in-app purchases 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
Clausius is free to download; Napier's Bones Simulation costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Clausius ships an update every 8 months, Napier's Bones Simulation every 25 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.
| Parameter | Clausius | Napier's Bones Simulation |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 8 months — better | Every 25 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad, Mac | iPhone, iPad, iPod, Apple TV — better |
| Requires iOS | 15.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Smitesh Bakrania | Ventura Educational Systems |
In-app purchases
Clausius
No in-app purchases
Napier's Bones Simulation
No in-app purchases
Questions
Is Clausius free?
Is Napier's Bones Simulation free?
Do Clausius or Napier's Bones Simulation have ads?
Which is updated more often, Clausius or Napier's Bones Simulation?
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