# Lorentz Force Calculator vs Bumper DV

The clearest difference is price: Bumper DV at Free against Lorentz Force Calculator's $2.99. Bumper DV also leads on update cadence (every 7 months vs every 26 months) and iOS requirement (13.0 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Bumper DV is free to download; Lorentz Force Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Lorentz Force Calculator ships an update every 26 months, Bumper DV every 7 months. The most recent releases landed on September 21, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Lorentz Force Calculator | Bumper DV |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 7 months** |
| Size | 1 MB | 9 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Shenzhen Yilushi Technology Co.,ltd](https://appshunter.io/developer/1760309976) |

## What reviewers say

### Lorentz Force Calculator

[App page](https://appshunter.io/ios/app/lorentz-force-calculator/id1422587699)

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

**In-app purchases:** none


### Bumper DV

[App page](https://appshunter.io/ios/app/bumper-dv/id6503339051)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lorentz Force Calculator free?

Lorentz Force Calculator costs $2.99, with no in-app purchases.

### Is Bumper DV free?

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

### Do Lorentz Force Calculator or Bumper DV have ads?

Neither Lorentz Force Calculator nor Bumper DV shows ads.

### Which is updated more often, Lorentz Force Calculator or Bumper DV?

Lorentz Force Calculator ships an update every 26 months, and Bumper DV every 7 months. Most recently, Lorentz Force Calculator was updated on September 21, 2026 and Bumper DV on October 19, 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.*