# SIG BDX vs TrueData

The clearest difference is review sentiment: TrueData at 100% against SIG BDX's 33%. TrueData also leads on rating (5.0 vs 3.4). SIG BDX's advantage is ratings volume (69 vs 12). On price, update cadence, ads and in-app purchases there is nothing between them.

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

TrueData holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: SIG BDX has 69 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 33% of SIG BDX's written reviews are positive against 100% of TrueData's.

SIG BDX ships an update every 3 weeks, TrueData every 4 weeks. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | SIG BDX | TrueData |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (69 ratings)](https://appshunter.io/ios/app/sig-bdx/id1403025894/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/truedata/id6755197795/reviews)** |
| Number of ratings | **69** | 12 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free | Free |
| Size | 137 MB | 32 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Sig Sauer, Inc.](https://appshunter.io/developer/1114396362) | [Sierra Bullets LLC](https://appshunter.io/developer/1450057822) |

## What reviewers say

### 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


### TrueData

[App page](https://appshunter.io/ios/app/truedata/id6755197795)

This app calculates ballistic data for rifles and bullets, factoring in weather and distance. It offers advanced features like muzzle velocity and BC truing, extensive bullet libraries, and customizable rifle and bullet profiles. Exportable trajectory tables and real-time weather integration enhance accuracy for shooters.

**Highlights:** Ballistic calculations, Real-time weather integration, Extensive bullet libraries, Customizable rifle and bullet profiles, Trajectory table generation, Muzzle velocity and BC truing, Spin drift calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is SIG BDX free?

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

### Is TrueData free?

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

### Which has better reviews, SIG BDX or TrueData?

TrueData is rated higher. SIG BDX averages 3.4 out of 5 from 69 ratings, while TrueData averages 5.0 from 12 ratings.

### Do SIG BDX or TrueData have ads?

Neither SIG BDX nor TrueData shows ads.

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

SIG BDX ships an update every 3 weeks, and TrueData every 4 weeks. Most recently, SIG BDX was updated on November 11, 2026 and TrueData on November 9, 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.*