Comparison

TRASOL vs Reactor (Official)

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

Head to head
About

TRASOL

This advanced ballistic calculator provides real-time environmental data and trajectory predictions for precision shooting. It features a heads-up display for automatic target solutions, moving target tracking, and shot logging capabilities.

Highlights
  • Real-time sensor integration
  • Heads-up display (HUD)
  • Moving target tracking
  • Unlimited equipment profiles
  • Cloud backup/sync
  • Long-range accuracy up to 5000 yards
  • Scope turret calibration
Features
Read full description

Stop adjusting – start hitting. Utilize the most effective ballistic software ever invented. Simple, intuitive and now integrated with smart sensors. With the tap of a button you can calibrate density altitude, Coriolis, cant and slope in real-time. Fully integrated with our new heads-up display, TRASOL enables you to capture video and snapshots, as well as track moving targets. TRASOL was developed for precision shooters who desire first round hit accuracy out to 5000 yards. FEATURES • Interfacing HUD • Automatic device sensor input • Unlimited equipment profiles • Cloud backup/sync for equipment data • Range up to 5000 yards (4572 meters) • Highly accurate trajectory prediction • Moving target speed tracking • Scope turret calibration • Cold bore adjustment • Light/dark color themes • Built-in tutorials HEADS-UP DISPLAY There is genius in simplicity. TRASOL is the first ballistic application to incorporate Heads-Up Display technology. By using your iPhone’s or iPad’s built-in camera and onboard sensors, TRASOL allows users to point their device at their target and automatically generate absolute accuracy solutions. The HUD environment has highly intuitive drag-and-drop tools for quick input of range and wind, and the device’s sensors do the rest. The HUD also allows tracking of moving targets to provide very accurate lead solutions. Photo/video capturing capability allows you to log your shots easily and share them with your friends. REFINED ACCURACY Utilizing proprietary algorithms, TRASOL is the most accurate ballistics calculator on the planet. No more need to alter manufacturer bullet data to get your hits; we developed new algorithms using Doppler radar data to create the most predictive flight path possible. In live-fire testing of TRASOL’s predictions the following results were documented (.338LM ammunition, using manufacturer's published data): • Within 0.1 MRAD up to 1400 yards • Within 0.5 meters up to 1700 yards • Within 1.1 meters at 2200 yards

About

Reactor (Official)

This app enhances shooting performance by automating data logging and providing insights into shots, sets, and environmental conditions. It offers real-time metrics and maintenance reminders for rifle components, similar to a fitness tracker for marksmanship.

Highlights
  • Automated data logging
  • Shooting performance insights
  • Rifle component maintenance alerts
  • Real-time heads-up display
  • Weather information integration
  • Shot and set summaries
Features
Read full description

Reactor's mobile app pairs with the Reactor Fusion Module to automate your data books and provide valuable insights into your shooting. It brings similar benefits as a fitness tracking app to the marksmanship world, allowing you to spend more time focused on your shooting and less time writing with pen and paper. The app shows summaries of your shots, sets, weather information, and displays metrics for each rifle component for knowing when it's time to perform maintenance on your rifle. The real-time heads-up display helps you learn more about how you cant your rifle when you shoot, how barrel temperature affects your shots, and shows quick-access weather information. All of this information is automatically logged to your account when shots take place. Reactor NEVER logs this information without your Fusion Module being on and paired, and we have completely transparent business practices to ensure your privacy and rights as a gun owner are protected. If you have questions, please contact us at https://reactorusa.com/contact

Screenshots

TRASOL4 screens
Reactor (Official)4 screens

Verdict

The call

The clearest difference is review sentiment: Reactor (Official) at 100% against TRASOL's 52%. Reactor (Official) also leads on rating (5.0 vs 3.9) and in-app purchases (none vs 1). TRASOL's advantage is ratings volume (41 vs 2). On price, ads and device support 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. TRASOL sells 1 one-off in-app purchase. Reactor (Official) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Reactor (Official) holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: TRASOL has 41 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 52% of TRASOL's written reviews are positive against 100% of Reactor (Official)'s.

UpkeepUpdate frequency

TRASOL ships an update every 10 months, Reactor (Official) every 2 weeks. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

Scorecard7 real differences · 3 level
TRASOL versus Reactor (Official): the parameters behind the verdict, then further details
ParameterTRASOLReactor (Official)
PriceFreeFree
Rating3.9 (41 ratings)5.0 (2 ratings) — better
Positive reviews52.4% of reviews100.0% of reviews — better
Number of ratings41 — better2
Update frequencyEvery 10 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size11 MB66 MB
Age rating17+12+
DeveloperDesert TechReactor, LLC

Customer experience

TRASOL

All ratings40 ratings
Positive75.0%
Neutral10.0%
Negative15.0%
Written reviews42 reviews
Positive52.4%
Neutral14.3%
Negative33.3%

Reactor (Official)

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

TRASOL

Reported bugs

23 issues
  • Elevation off maps is incorrect
  • Pressure (Inhg) does not go below 25.00
  • App crashes when getting environmental info
  • Cannot count results in Europe
  • Purchase restore was broken
Show 18 more
  • Old purchase wants additional payment
  • Cannot restore purchase
  • Cannot change data or enter distances
  • Keyboard or numbers not pulling up
  • Needs iPhone X update
  • Controls not intuitive
  • Doesn't work with iOS 11.2.1
  • App won't launch
  • Crashes when trying to use certain functions
  • Cannot save app settings
  • App crashes immediately
  • Continually crashed on iPhone 6s
  • Sync not working
  • Sync could not restore old backup
  • App crashes when entering twist rate
  • App crashes when trying to sync
  • App shuts down for no reason
  • Cannot delete rifles

Requested features

5 requests
  • Add powder temperature capability
  • Ability to print ballistics table
  • Add effect of powder temperature on muzzle velocity
  • Ability to import data from Kestrel
  • Dark mode option

Reactor (Official)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

TRASOL

One-time1
  • Full TRASOL Upgrade$39.99
None

Reactor (Official)

No in-app purchases

Questions

Is TRASOL free?
TRASOL is free to download, with in-app purchases available.
Is Reactor (Official) free?
Reactor (Official) is free to download, with no in-app purchases.
Which has better reviews, TRASOL or Reactor (Official)?
Reactor (Official) is rated higher. TRASOL averages 3.9 out of 5 from 41 ratings, while Reactor (Official) averages 5.0 from 2 ratings.
Do TRASOL or Reactor (Official) have ads?
Neither TRASOL nor Reactor (Official) shows ads.
Which is updated more often, TRASOL or Reactor (Official)?
TRASOL ships an update every 10 months, and Reactor (Official) every 2 weeks. Most recently, TRASOL was updated on October 29, 2026 and Reactor (Official) on October 21, 2026.

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