Comparison

Nikon SpotOn vs TrueData

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Nikon SpotOn

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
Read full description

Spot On Ballistic Match Technology provides precise aiming points for any Nikon BDC reticle riflescope and instant reference for sighting in other Nikon riflescopes with plex, MilDot or standard crosshair reticles. All you need is a rifle, a Nikon riflescope and a rangefinder…SpotOn does all the work for you, showing you what the possibilities are before you ever fire a shot! Includes sections for handloaders, atmospheric conditions, comparing loads as well as the ability to create and email a field reference chart.

About

TrueData

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
Read full description

Set up your rifles and bullets, refresh the weather and drag out your distance. Turret clicks are calculated on the fly and displayed instantly. Includes the full Sierra and Barnes bullet libraries and Doppler Data, plus: • Muzzle Velocity truing feature • BC truing feature • Barnes Doppler Library • Sierra Doppler Library • Multiple weather input options for any scenario or equipment • Elevation offset option for rifle zero • Intuitive, modern interface • Quickly dial in the wind and target distance • Calculates multiple click adjustments in MRAD or MOA • Supports combinations of metric and imperial • Supports ICAO and US Metro units • Supports G7, G1 and many other drag models • Supports either single, or up to 6 BC entries • Create and save your own rifles and bullets • Quickly view and duplicate bullets and rifles • Calculates spin drift • Retrieves weather at your location • Allows overriding temperature, humidity, air pressure • Automatically detects shooting angle (up/dn) • Generates trajectory tables showing zero and transonic zone • Ability to export trajectories as CSV/TSV/Pipe and PDF Report • Displays equivalent 1 MOA & MRAD when choosing distance • Displays equivalent 1 click of current scope at distance • Haptic feedback for positive button presses • Export your settings, rifles and bullets to Google Drive, DropBox, Email... • Import your settings, rifles and bullets to make switching devices easier • Add multiple distances to view a convenient Target Card • Connect your Bluetooth weather device for real-time changes (currently supports Calypso, Kestrel, Skywatch and WeatherFlow) • Account for weather conditions while zeroing (Zero Weather) • Allow for variations in powder temperature with a simple interface • Allow for chronograph distance in bullet velocity • Fine tune your exact Wind Direction in a popup • Convenient Training Timer • Quick compass option in the Wind card • Virtual Range Finder estimates your target distance via GPS • Select basic or detailed form entry options in settings • Adjust your rifle's Scope Scale Factor • Round trajectories to your scope's clicks

Screenshots

Nikon SpotOn4 screens
TrueData4 screens

Verdict

The call

The clearest difference is review sentiment: TrueData at 100% against Nikon SpotOn's 22%. TrueData also leads on rating (5.0 vs 2.1) and update cadence (every 4 weeks vs every 6 months). Nikon SpotOn's advantage is ratings volume (380 vs 12). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

TrueData holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: Nikon SpotOn has 380 ratings behind it against 12, 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 100% of TrueData's.

UpkeepUpdate frequency

Nikon SpotOn ships an update every 6 months, TrueData every 4 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
Nikon SpotOn versus TrueData: the parameters behind the verdict, then further details
ParameterNikon SpotOnTrueData
PriceFreeFree
Rating2.1 (380 ratings)5.0 (12 ratings) — better
Positive reviews21.9% of reviews100.0% of reviews — better
Number of ratings380 — better12
Update frequencyEvery 6 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.5 — better15.6
Further details — not scored
Size7 MB32 MB
Age rating4+17+
DeveloperNikon Inc.Sierra Bullets LLC

Customer experience

Nikon SpotOn

All ratings375 ratings
Positive22.1%
Neutral6.9%
Negative70.9%
Written reviews137 reviews
Positive21.9%
Neutral12.4%
Negative65.7%

TrueData

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Nikon SpotOn

Reported bugs

4 issues
  • 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

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

TrueData

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Nikon SpotOn

No in-app purchases

None

TrueData

No in-app purchases

Questions

Is Nikon SpotOn free?
Nikon SpotOn 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, Nikon SpotOn or TrueData?
TrueData is rated higher. Nikon SpotOn averages 2.1 out of 5 from 380 ratings, while TrueData averages 5.0 from 12 ratings.
Do Nikon SpotOn or TrueData have ads?
Neither Nikon SpotOn nor TrueData shows ads.
Which is updated more often, Nikon SpotOn or TrueData?
Nikon SpotOn ships an update every 6 months, and TrueData every 4 weeks. Most recently, Nikon SpotOn was updated on November 1, 2026 and TrueData on November 5, 2026.

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