# Nikon SpotOn vs SIG BDX

The clearest difference is rating: SIG BDX at 3.4 against Nikon SpotOn's 2.1. SIG BDX also leads on update cadence (every 3 weeks vs every 6 months) and review sentiment (33% vs 22%). Nikon SpotOn's advantage is ratings volume (380 vs 68) and iOS requirement (14.5 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

SIG BDX holds the better App Store score, 3.4 against 2.1. That said, the two scores are not equally well evidenced: Nikon SpotOn has 380 ratings behind it against 68, so its average is the more settled of the two. Written reviews point the same way: 22% of Nikon SpotOn's written reviews are positive against 33% of SIG BDX's.

Nikon SpotOn ships an update every 6 months, SIG BDX every 3 weeks. Both last shipped on October 22, 2026.

## The numbers

| Metric | Nikon SpotOn | SIG BDX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (380 ratings)](https://appshunter.io/ios/app/nikon-spoton/id399224811/reviews) | **[3.4 (68 ratings)](https://appshunter.io/ios/app/sig-bdx/id1403025894/reviews)** |
| Number of ratings | **380** | 68 |
| Positive reviews | 21.9% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 7 MB | 137 MB |
| Requires iOS | **14.5** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nikon Inc.](https://appshunter.io/developer/330046130) | [Sig Sauer, Inc.](https://appshunter.io/developer/1114396362) |

## What reviewers say

### Nikon SpotOn

[App page](https://appshunter.io/ios/app/nikon-spoton/id399224811)

This app calculates precise aiming points for Nikon BDC reticle riflescopes. It also provides instant sighting references for other Nikon riflescopes with various reticle types. The tool helps users determine optimal shooting solutions before firing a shot.

**Highlights:** Precise aiming points for BDC reticles, Sighting references for other Nikon reticles, Rangefinder integration, Load comparison, Atmospheric condition adjustments, Field reference chart creation

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate ballistic calculations
- 💡 Extensive caliber and ammo options
- 👍 Helpful for muzzleloader and rifle scopes
- 🎯 Improved shooting accuracy and confidence

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- 🔍 Missing scope and ammo options
- 🔌 Compatibility issues with newer devices
- 🔍 Unreliable data and incorrect ballistics

**Reported bugs**

- App crashes when selecting bullet or ammo
- Incorrect muzzle velocity and ballistic data
- Scope options not showing up for some users
- Weather data not loading properly

**Requested features**

- Ability to save multiple scope and ammo profiles
- Option to manually input barrel length
- Metric unit support
- Improved weather data integration


### 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 Nikon SpotOn free?

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

### Is SIG BDX free?

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

### Which has better reviews, Nikon SpotOn or SIG BDX?

SIG BDX is rated higher. Nikon SpotOn averages 2.1 out of 5 from 380 ratings, while SIG BDX averages 3.4 from 68 ratings.

### Do Nikon SpotOn or SIG BDX have ads?

Neither Nikon SpotOn nor SIG BDX shows ads.

### Which is updated more often, Nikon SpotOn or SIG BDX?

Nikon SpotOn ships an update every 6 months, and SIG BDX every 3 weeks. Most recently, Nikon SpotOn was updated on October 22, 2026 and SIG BDX on October 22, 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.*