# TeslaTown vs Napier's Bones Simulation

The clearest difference is price: TeslaTown at Free against Napier's Bones Simulation's $1.99. TeslaTown also leads on iOS requirement (9.3 vs 12.0). Napier's Bones Simulation's advantage is update cadence (every 25 months vs every 74 months). On ads, in-app purchases and device support there is nothing between them.

TeslaTown 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.

TeslaTown ships an update every 74 months, Napier's Bones Simulation every 25 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | TeslaTown | Napier's Bones Simulation |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.5 (15 ratings)](https://appshunter.io/ios/app/teslatown/id571972528/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 74 months | **Every 25 months** |
| Monetization | Free | — |
| Size | 75 MB | 29 MB |
| Requires iOS | **9.3** | 12.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [University of Illinois](https://appshunter.io/developer/422670617) | [Ventura Educational Systems](https://appshunter.io/developer/371324172) |

## What reviewers say

### TeslaTown

[App page](https://appshunter.io/ios/app/teslatown/id571972528)

Explore electricity generation and delivery through interactive structures and informational photos. This app is designed for upper elementary and middle school students to learn about electromagnetism and energy systems.

**Highlights:** Electricity generation and delivery exploration, Hydroelectric, solar, and wind power examples, Interactive structures, Informational photographs, Electromagnetism topics, Grades 3-8 curriculum alignment

**In-app purchases:** none


### Napier's Bones Simulation

[App page](https://appshunter.io/ios/app/napiers-bones-simulation/id1093899282)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TeslaTown free?

TeslaTown is free to download, with no in-app purchases.

### Is Napier's Bones Simulation free?

Napier's Bones Simulation costs $1.99, with no in-app purchases.

### Do TeslaTown or Napier's Bones Simulation have ads?

Neither TeslaTown nor Napier's Bones Simulation shows ads.

### Which is updated more often, TeslaTown or Napier's Bones Simulation?

TeslaTown ships an update every 74 months, and Napier's Bones Simulation every 25 months. Most recently, TeslaTown was updated on October 26, 2026 and Napier's Bones Simulation on October 26, 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.*