Comparison

ReactionTrainer vs OpenTrack Judge

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

Head to head
About

ReactionTrainer

Improve your sprint starts with this reflex training app. It simulates race conditions with audio and visual cues, measuring your reaction time to help you achieve faster race starts. Unlock full features with an in-app purchase.

Highlights
  • Simulated race starts with audio cues
  • Visual clues for 'Ready' and 'Shot'
  • Reaction time measurement
  • History and graph analysis
  • Sound and visual clue toggles
  • 3D Touch support for faster starts
Read full description

Train your reflexes for faster race starts. Here is how it works : Push the start button. Then, every 5 seconds - The app says 'Ready' - Between 1.5 and 2.5 seconds later (random), your hear a shot - Tap the screen to simulate a start as fast as you can. This sequence repeats itself until you push 'Stop'. Reaction times are stored for later analysis. The free version gives you 5 attempts before issuing a request to buy - just enough to know how it works. Unlocking is available as an in-app purchase. You can force-quit te app to get another 5 attempts, but past attempts will no longer show in the history table and graph. They are kept on file though for when one should choose to buy later. More features - Turn sound on or off. - Turn visual clues on or off (orange dot when 'Ready', green dot when shot sounds) - On iPhone 6s or later, you can use 3D touch so you can leave your finger on the screen. When the start is given, just push harder. - Reaction times of less than .01 seconds are considered false starts. - No publicity. - Attach your phone on your arm, listen for 'on your marks', (step in the blocks), 'ready' - 'go'. Your phones movement detection will measure your reaction time.

About

OpenTrack Judge

Features
Read full description

OpenTrack Judge is a new results recording app for OpenTrack, tailored specifically for event organizers and judges in athletics competitions. By leveraging the convenience of your mobile or tablet, this app offers an optimized user interface that ensures swift and accurate result recording on-the-go. With OpenTrack Judge, experience enhanced usability, adaptability, and precision. Make every competition smoother, every decision sharper, and every result instantly accessible.

Screenshots

ReactionTrainer4 screens
OpenTrack Judge4 screens

Verdict

The call

The clearest difference is in-app purchases: OpenTrack Judge at none against ReactionTrainer's 1. OpenTrack Judge also leads on update cadence (every 3 months vs every 13 months). On price, ads, device support and iOS requirement 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. ReactionTrainer sells 1 one-off in-app purchase. OpenTrack Judge asks for nothing beyond the download.

UpkeepUpdate frequency

ReactionTrainer ships an update every 13 months, OpenTrack Judge every 3 months. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
ReactionTrainer versus OpenTrack Judge: the parameters behind the verdict, then further details
ParameterReactionTrainerOpenTrack Judge
PriceFreeFree
Rating3.4 (5 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 13 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size8 MB28 MB
Age rating9+4+
DeveloperBert Torfs BVBASportity OU

In-app purchases

1 purchases

ReactionTrainer

One-time1
  • ReactionTrainer Unlock$0.99
None

OpenTrack Judge

No in-app purchases

Questions

Is ReactionTrainer free?
ReactionTrainer is free to download, with in-app purchases available.
Is OpenTrack Judge free?
OpenTrack Judge is free to download, with no in-app purchases.
Do ReactionTrainer or OpenTrack Judge have ads?
Neither ReactionTrainer nor OpenTrack Judge shows ads.
Which is updated more often, ReactionTrainer or OpenTrack Judge?
ReactionTrainer ships an update every 13 months, and OpenTrack Judge every 3 months. Most recently, ReactionTrainer was updated on October 24, 2026 and OpenTrack Judge on October 24, 2026.

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