# WindFX vs SIG BDX

The clearest difference is price: SIG BDX at Free against WindFX's $1.99. SIG BDX also leads on update cadence (every 3 weeks vs every 4 months). WindFX's advantage is iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

SIG BDX is free to download; WindFX costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

WindFX ships an update every 4 months, SIG BDX every 3 weeks. The most recent releases landed on September 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | WindFX | SIG BDX |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[3.4 (68 ratings)](https://appshunter.io/ios/app/sig-bdx/id1403025894/reviews)** |
| Number of ratings | — | **68** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 1 MB | 137 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [pyd.app](https://appshunter.io/developer/412417902) | [Sig Sauer, Inc.](https://appshunter.io/developer/1114396362) |

## What reviewers say

### WindFX

[App page](https://appshunter.io/ios/app/windfx/id1369947297)

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

**In-app purchases:** none


### SIG BDX

[App page](https://appshunter.io/ios/app/sig-bdx/id1403025894)

This application connects a rangefinder to a riflescope, displaying an illuminated holdover dot for precise aiming. It facilitates syncing devices and provides ballistic data for accurate shots up to 800 yards.

**Highlights:** Sync rangefinder with riflescope, Display illuminated holdover dot, Measure target distance, Ballistic data integration, Connect The Dot™ system

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

**In-app purchases:** none


## Frequently asked questions

### Is WindFX free?

WindFX costs $1.99, with no in-app purchases.

### Is SIG BDX free?

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

### Do WindFX or SIG BDX have ads?

Neither WindFX nor SIG BDX shows ads.

### Which is updated more often, WindFX or SIG BDX?

WindFX ships an update every 4 months, and SIG BDX every 3 weeks. Most recently, WindFX was updated on September 24, 2026 and SIG BDX on October 14, 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.*