Comparison

Reaction Workout Timer vs Reaction Lab

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

Head to head
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.

About

Reaction Lab

Measure and improve your response speed with a suite of scientifically-inspired tests. Track progress over time with detailed analytics and gain insights into your performance in various situations. Designed for focus and privacy, all data stays on your device.

Highlights
  • Multiple reaction time test types
  • Visual, audio, and haptic cues
  • Grip-release and motion-based tests
  • Dual-task and fatigue tracking
  • Detailed session summaries and trend charts
  • On-device data privacy
  • Offline functionality
Features
Read full description

Reaction Lab is a fast, accurate reaction-time testing suite built to help you measure and understand how quickly you respond in different situations. Whether you’re training for sports, improving focus, or tracking performance over time, Reaction Lab gives you clean, scientifically-inspired tests and easy-to-read analytics—right on your iPhone. Test Your Reaction Time in Multiple Ways Reaction time isn’t just one thing. Reaction Lab includes multiple test types designed to measure different pathways and skills: • Simple Visual Tap – Tap as soon as a visual stimulus appears • Choice Reaction – Respond to directional or on-screen prompts with speed and accuracy • Audio Reaction – React to sound cues for “eyes-off” testing • Haptic Reaction – React to vibration cues with no visuals or audio • Grip-Release (Inhibitory Control) – Hold, then release as fast as possible when prompted • Motion Reaction – React by moving the phone (tilt/lift/rotate) • Dual-Task Under Load – React while performing a secondary task to measure real-world performance • Fatigue Drift – Track how reaction time changes over a continuous timed session • Anticipation vs Reaction – Detect premature responses and impulse control patterns • Asymmetry Testing – Compare dominant vs non-dominant performance Track Progress Over Time Reaction Lab automatically saves your sessions and turns raw reaction data into meaningful insights: • Session summaries: median, average, best, worst, variability • Accuracy metrics: false starts, errors, timeouts • Trend charts by test type over 7 / 30 / 90 days • Per-session breakdowns across every trial Clean, Focused, Tool-Like Design Reaction Lab is built to be simple, fast, and distraction-free: • Large touch targets and high-contrast test screens • Clear trial progress indicators • Instant feedback on mistakes or false starts • Smooth navigation between tests, history, insights, and settings Fully On-Device and Private Your data stays on your device. • No accounts • No cloud sync required • No tracking • Works offline If you’ve ever wondered how your reaction time changes with training, fatigue, stress, or consistency—Reaction Lab gives you the tools to measure it. Download Reaction Lab and start testing. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://anthonyharveyapps.com/privacy-policy-reaction-lab

Screenshots

Reaction Workout Timer3 screens
Reaction Lab4 screens

Verdict

The call

The clearest difference is in-app purchases: Reaction Workout Timer at none against Reaction Lab's 2. Reaction Workout Timer also leads on update cadence (every 3 weeks vs every 7 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. Reaction Lab sells 2 in-app purchases, starting at $1.99 per month. Reaction Workout Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Reaction Workout Timer ships an update every 3 weeks, Reaction Lab every 7 months. The most recent releases landed on October 13, 2026 and September 26, 2026 respectively.

Scorecard2 real differences · 7 level
Reaction Workout Timer versus Reaction Lab: the parameters behind the verdict, then further details
ParameterReaction Workout TimerReaction Lab
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 3 weeks — betterEvery 7 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS18.218.0 — better
Further details — not scored
Size8 MB22 MB
Age rating4+4+
DeveloperHitfire Production ABAnthony Harvey

In-app purchases

None

Reaction Workout Timer

No in-app purchases

2 purchases

Reaction Lab

Subscriptions2
  • React Fast Monthly3 Days trial$1.991 Month
  • React Fast Yearly3 Days trial$4.991 Year

Questions

Is Reaction Workout Timer free?
Reaction Workout Timer is free to download, with no in-app purchases.
Is Reaction Lab free?
Reaction Lab is free to download, with in-app purchases available.
Do Reaction Workout Timer or Reaction Lab have ads?
Neither Reaction Workout Timer nor Reaction Lab shows ads.
Which is updated more often, Reaction Workout Timer or Reaction Lab?
Reaction Workout Timer ships an update every 3 weeks, and Reaction Lab every 7 months. Most recently, Reaction Workout Timer was updated on October 13, 2026 and Reaction Lab on September 26, 2026.

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