Comparison

AI Endurance vs Reaction Workout Timer

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

Head to head
About

AI Endurance

This AI-powered fitness coach analyzes your personal data to create a customized training plan. It's designed for athletes looking to optimize their performance and achieve superior results by training smarter.

Highlights
  • AI-powered performance analysis
  • Personalized training plans
  • Optimized for unique physiology
  • Trusted by cyclists, runners, triathletes
  • Train smarter, not harder
Features
Read full description

AI Endurance is the data-driven AI coach for running, cycling, and triathlon. It learns from your own training to build a model of you (your fitness, your recovery, your race goal), then shapes your plan around that model and adapts it every day, so you always know what to do next. WHY ATHLETES CHOOSE AI ENDURANCE • Adaptive AI training plans: Set a race goal and get a full plan that reshapes itself as your fitness and recovery change. No more rigid plans that fall apart after one bad week. • Recovery you can trust: We read your HRV, resting heart rate, and DFA a1 to tell you when to push and when to back off, so you train hard without digging a hole. • Talk to your AI coach: Ask questions in plain language. Change a workout, understand your data, or plan your week just by chatting. • See inside every workout: Power and pace curves, durability, decoupling, and drift analysis that show exactly how your fitness is changing. • Built to peak, not just predict: Most apps stop at predicting a race time. AI Endurance builds your entire plan to optimize your race-day performance, and refines it as your data changes. • Two-way sync, not just a connection: AI Endurance imports your workouts from Garmin, Strava, Coros, Polar, Wahoo, Suunto and more, and reads your recovery data from Oura, Whoop, and your watch. Then it pushes your planned workouts straight to Garmin, Coros, Wahoo, Zwift, TrainingPeaks and more, ready to train with no manual entry. FOR EVERY ENDURANCE ATHLETE Whether you're chasing a first 5K, a Boston qualifier, a century ride, or an Ironman, AI Endurance meets you where you are and grows with you. Runners, cyclists, and triathletes all train from one adaptive plan. Train smarter. Recover better. Race faster. Download AI Endurance and get a coach that actually adapts to you. By using AI Endurance, you agree to our Privacy Policy and the Apple Standard End User License Agreement (EULA). - Privacy Policy: https://aiendurance.com/privacypolicy - Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Reaction Workout Timer

Features
Read full description

Enhance your reflexes and focus with Reaction Workout Timer that delivers structured timed drills using random cues and clear signals for boxing, MMA, and sports training. Set up sessions quickly with flexible rounds, rest periods, and interval controls tailored to your needs. Features include: Customizable rounds, round length, and rest intervals Random reaction cues with adjustable timing Bias settings for varied wait times Clear signals via beep, haptics, and bright green flash Warm-up rounds, rest cycles, and finish gong Pause, resume, skip, and quick reset controls Large timer display with progress indicator Offline functionality without account requirements Audio mixing compatible with headphones Train anywhere with crisp audio and visual cues that keep your reflex practice sharp and focused. Start improving your reaction speed and timing with every session.

Screenshots

AI Endurance4 screens
Reaction Workout Timer3 screens

Verdict

The call

The clearest difference is in-app purchases: Reaction Workout Timer at none against AI Endurance's 2. Reaction Workout Timer also leads on update cadence (every 3 weeks vs every 5 months). AI Endurance's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.2). On price and ads 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. AI Endurance sells 2 in-app purchases, starting at $20.00 per month. Reaction Workout Timer asks for nothing beyond the download.

UpkeepUpdate frequency

AI Endurance ships an update every 5 months, Reaction Workout Timer every 3 weeks. The most recent releases landed on September 21, 2026 and July 1, 2026 respectively.

Scorecard4 real differences · 6 level
AI Endurance versus Reaction Workout Timer: the parameters behind the verdict, then further details
ParameterAI EnduranceReaction Workout Timer
PriceFreeFree
Rating4.1 (22 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings22 — better—
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better18.2
Further details — not scored
Size3 MB8 MB
Age rating4+4+
DeveloperAI EnduranceHitfire Production AB

In-app purchases

2 purchases

AI Endurance

Subscriptions2
  • Monthly Subscription$20.001 Month
  • Yearly Subscription$200.001 Year
None

Reaction Workout Timer

No in-app purchases

Questions

Is AI Endurance free?
AI Endurance is free to download, with in-app purchases available.
Is Reaction Workout Timer free?
Reaction Workout Timer is free to download, with no in-app purchases.
Do AI Endurance or Reaction Workout Timer have ads?
Neither AI Endurance nor Reaction Workout Timer shows ads.
Which is updated more often, AI Endurance or Reaction Workout Timer?
AI Endurance ships an update every 5 months, and Reaction Workout Timer every 3 weeks. Most recently, AI Endurance was updated on September 21, 2026 and Reaction Workout Timer on July 1, 2026.

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