# TRACE Ballistics vs BD

The clearest difference is update cadence: TRACE Ballistics at every 6 days against BD's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TRACE Ballistics ships an update every 6 days, BD every 3 months. The most recent releases landed on September 14, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | TRACE Ballistics | BD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 months |
| Size | 37 MB | 18 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wouter Theron](https://appshunter.io/developer/1896715274) | [Shenzhen Rierxing Electronics Co., Ltd](https://appshunter.io/developer/6773068820) |

## What reviewers say

### TRACE Ballistics

[App page](https://appshunter.io/ios/app/trace-ballistics/id6770094995)

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

**In-app purchases:** none


### BD

[App page](https://appshunter.io/ios/app/bd-engine/id6773223585)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TRACE Ballistics free?

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

### Is BD free?

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

### Do TRACE Ballistics or BD have ads?

Neither TRACE Ballistics nor BD shows ads.

### Which is updated more often, TRACE Ballistics or BD?

TRACE Ballistics ships an update every 6 days, and BD every 3 months. Most recently, TRACE Ballistics was updated on September 14, 2026 and BD on September 12, 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.*