Comparison

Reaction Timer Training vs Interval Randomizer

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

Head to head
About

Reaction Timer Training

Enhance your cognitive and physical performance with this reaction training app. Improve reaction time, decision-making, and coordination using customizable drills and Apple Watch integration. Track progress and sync data with the Health app.

Highlights
  • Improve reaction time
  • Enhance decision time
  • Develop peripheral vision
  • Boost coordination and speed
  • Customizable training drills
  • Apple Watch integration
  • Health app sync
Features
Read full description

# Reaction Timer Training ## Train Faster. React Smarter. Unlock your brain's full potential with **Reaction Timer Training**—the ultimate app for improving reaction speed, decision-making, focus, and cognitive performance. Unlike many reaction training apps, **no additional hardware is required**. All you need is your **iPhone or iPad** to start training anywhere, anytime. Expand your training even further by connecting **up to five additional iOS devices**, allowing you to create more dynamic and challenging reaction exercises. Control your training effortlessly with the **Apple Watch** companion app, which lets you start, pause, and manage sessions directly from your wrist while your iPhone runs the workout. ## Science-Backed Performance Training Scientific research has shown that elite sports performance depends not only on physical ability but also on sensory and cognitive skills. Athletes who can quickly identify relevant information, make faster decisions, and execute the appropriate response gain a significant competitive advantage. Reaction time, anticipation, and decision-making are essential components of high-level athletic performance—and they can all be trained. ## Improve Your: * Reaction Time * Decision-Making Speed * Peripheral Vision * Hand-Eye Coordination * Speed * Agility Reaction speed is a trainable skill. Regular practice can help improve how quickly you perceive, process, and respond to visual and auditory stimuli. ## Ready-to-Use Training Library Start immediately with a growing library of professionally designed training sessions. With a **Premium Subscription**, you'll unlock the complete training library and advanced customization features. You can: * Customize any predefined training. * Create unlimited custom workouts. * Configure exercises using: * Colors * Sounds * Arrows * Numbers * Letters * Images * And more. ## Powerful Interval Training Create training sessions that perfectly match your goals. Configure: * Work and rest intervals * Multiple training cycles * Different timings for each cycle * Different reaction stimuli for every phase Whether you need simple interval workouts or complex sport-specific reaction drills, Reaction Timer Training gives you complete control over every session. ## Perfect for Athletes and Coaches Reaction Timer Training is designed for athletes of all levels, as well as coaches looking to improve their athletes' reaction speed, decision-making, and cognitive performance. Whether you train individually or with a team, the app provides powerful tools to develop faster reactions and smarter decisions. Challenge yourself. Train your brain. Elevate your performance. ## Apple Health Integration Reaction Timer Training integrates with **Apple Health** to automatically record your workouts and keep track of your training activity. ## Learn More Reaction Timer Training Website: https://hmap13.wixsite.com/reactiontimer Terms of Service: https://hmap13.wixsite.com/reactiontimer/terms-of-use Privacy Policy: https://hmap13.wixsite.com/reactiontimer/privacy-policy

About

Interval Randomizer

Features
Read full description

Train without falling into a predictable rhythm. Interval Randomizer creates changing work intervals inside the minimum and maximum range you choose. Set your timing, recovery and workout duration, then let every round develop differently. RANDOMIZED TRAINING - Random work intervals inside your selected range - Adjustable minimum and maximum work time - Custom recovery periods - Configurable total workout duration - Large live timer with clear work and recovery phases BUILT FOR SERIOUS TRAINING - HIIT workouts - Boxing and combat sports - Tabata sessions - MMA and martial arts conditioning - Sparring drills - Cardio and reaction training STAY CONSISTENT - Daily Challenges - Training streaks - XP and levels - Coins and rewards - Session statistics - Training-minute tracking - Save your favorite workout setups FAST DURING A WORKOUT The main controls stay visible so you can change your workout without digging through menus. Clear colors identify work, recovery, timing and progress at a glance. MADE FOR IPHONE AND IPAD Interval Randomizer includes dedicated layouts for iPhone and iPad, giving each device the space and controls appropriate for training. The core timer and Daily Challenges are free. Optional advertising supports continued development, with an available upgrade to remove ads.

Screenshots

Reaction Timer Training4 screens
Interval Randomizer4 screens

Verdict

The call

The clearest difference is in-app purchases: Interval Randomizer at none against Reaction Timer Training's 1. Interval Randomizer also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). Reaction Timer Training's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.2). On price 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. Reaction Timer Training sells 1 in-app purchase, starting at $1.99 per month. Interval Randomizer asks for nothing beyond the download.

UpkeepUpdate frequency

Reaction Timer Training ships an update every 3 months, Interval Randomizer monthly. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

Scorecard5 real differences · 5 level
Reaction Timer Training versus Interval Randomizer: the parameters behind the verdict, then further details
ParameterReaction Timer TrainingInterval Randomizer
PriceFreeFree
Rating2.3 (4 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better18.2
Further details — not scored
Size35 MB6 MB
Age rating4+4+
DeveloperMillionTask, Unipessoal, LdaHitfire Production AB

In-app purchases

1 purchases

Reaction Timer Training

Subscriptions1
  • Premium Auto Renewable Subs$1.991 Month
None

Interval Randomizer

No in-app purchases

Questions

Is Reaction Timer Training free?
Reaction Timer Training is free to download, with in-app purchases available.
Is Interval Randomizer free?
Interval Randomizer is free to download, with no in-app purchases.
Do Reaction Timer Training or Interval Randomizer have ads?
Reaction Timer Training shows ads; Interval Randomizer does not.
Which is updated more often, Reaction Timer Training or Interval Randomizer?
Reaction Timer Training ships an update every 3 months, and Interval Randomizer monthly. Most recently, Reaction Timer Training was updated on October 5, 2026 and Interval Randomizer on October 6, 2026.

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