Comparison

Reaction Lab vs CDPD App

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

Head to head
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

About

CDPD App

Features
Read full description

Seu treino personalizado usando a metodologia do CDPD que vem ajudando atletas de todos os niveis a 12 anos. Sem precisar de treinador, sem pensar no que fazer, o app monta seu plano baseado no seu objetivo, equipamento e nível. - Wizard inteligente: 3 minutos e você tem um plano completo. - Treinos adaptados ao seu equipamento: corpo livre, halteres, academia - Os exercícios são pensados se você tiver problema de saúde e lesões - Modo execução guiada: timer, séries, repetições, passo a passo - Métricas pós-treino: esforço (Borg), frequência cardíaca, duração - Insights semanais: evolução e dicas personalizadas Baseado no método CDPD - 12 anos de preparação física Termos de Uso: https://app.cdpd.com.br/termos.html Política de Privacidade: https://app.cdpd.com.br/privacidade.html

Screenshots

Reaction Lab4 screens
CDPD App4 screens

Verdict

The call

The clearest difference is update cadence: CDPD App at every 3 days against Reaction Lab's every 7 months. CDPD App also leads on iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases 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. Reaction Lab sells 2 in-app purchases, starting at $1.99 per month and CDPD App sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Reaction Lab ships an update every 7 months, CDPD App every 3 days. The most recent releases landed on September 26, 2026 and October 4, 2026 respectively.

Scorecard2 real differences · 7 level
Reaction Lab versus CDPD App: the parameters behind the verdict, then further details
ParameterReaction LabCDPD App
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 7 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone
Requires iOS18.016.4 — better
Further details — not scored
Size22 MB70 MB
Age rating4+4+
DeveloperAnthony HarveyGuilherme Lorenz

In-app purchases

2 purchases

Reaction Lab

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

CDPD App

Subscriptions4
  • Plano Mensal$2.991 Month
  • Monthly subscription14 Days trial$3.991 Month
  • Assinatura trimestral14 Days trial$9.993 Months
Show 1 more
  • Assinatura Anual14 Days trial$39.991 Year

Questions

Is Reaction Lab free?
Reaction Lab is free to download, with in-app purchases available.
Is CDPD App free?
CDPD App is free to download, with in-app purchases available.
Do Reaction Lab or CDPD App have ads?
Neither Reaction Lab nor CDPD App shows ads.
Which is updated more often, Reaction Lab or CDPD App?
Reaction Lab ships an update every 7 months, and CDPD App every 3 days. Most recently, Reaction Lab was updated on September 26, 2026 and CDPD App on October 4, 2026.

Other comparisons