Best Readisync By Fatigue Science Apps

231+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated May 2026

Looking for free readisync by fatigue science apps? 20 of our 231+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Readisync By Fatigue Science

StressWatch: AI Stress Monitor#3

StressWatch: AI Stress Monitor by One Hundred Bad Ideas Limited

HRV & Habit Tracker for Watch
Worth Considering
💪 Health & Fitness
4.7😊(21K ratings)
FreeIn-App Purchases
#67in Health & Fitness
StressWatch: AI Stress Monitor screenshot 1
StressWatch: AI Stress Monitor screenshot 2
StressWatch: AI Stress Monitor screenshot 3
StressWatch: AI Stress Monitor screenshot 4
StressWatch: AI Stress Monitor screenshot 5
StressWatch: AI Stress Monitor screenshot 6

This app uses your Apple Watch data to monitor stress levels through heart rate variability. It helps you build healthier habits, improve sleep, and understand your body's response to daily activities, aiming to lower your Bio Age.

What We Love

  • 🚀 Helpful for managing stress
  • 👍 Easy to use and useful for monitoring stress
  • 🚀 Provides accurate and insightful data
  • 👍 Smooth and intuitive user interface

Room to Improve

  • 🐛 Inconsistent or inaccurate stress readings
  • 🔔 Frequent and unnecessary notifications
  • 💰 Subscription model is expensive

More Readisync By Fatigue Science apps to explore

4
Muscle Booster Workout Tracker
Muscle Booster Workout Tracker
Muscle Booster Workout Tracker
Calisthenics, Chair, Gym Plans
Free

This app acts as a personal trainer, creating customized workout plans for muscle gain, weight loss, or recovery. It offers a vast library of exercises and challenges for home or gym, adapting to your available equipment and goals.

Personalized workout plans1000+ exercise libraryHome and gym workouts
💪 Health & Fitness
(135K)
free with in-app purchases
5
Athlytic: AI Fitness Coach
Athlytic: AI Fitness Coach
Athlytic: AI Fitness Coach
HRV Based Training & Recovery
Free

This app analyzes your Apple Watch data to provide personalized insights into your recovery, exertion, and sleep. It offers daily recommendations for training, sleep targets, and bedtime, along with 24/7 health monitoring and detailed workout analysis.

HRV-based recovery analysisTargeted exertion guidancePersonalized sleep recommendations
💪 Health & Fitness
(10K)
free with in-app purchases
6
Visible: Pacing for illness
Visible: Pacing for illness
Visible: Pacing for illness
For Long Covid, ME/CFS, POTS+
Free

Manage energy-limiting health conditions like Long Covid and ME/CFS through personalized pacing insights. Track biometrics, log symptoms, and understand patterns to reduce crashes and improve daily well-being. Share health reports with your doctor and contribute to research.

Measure heart rate variability (HRV) and resting heart rateLog symptoms, medication, and daily exertionTrack patterns and understand biometric influences
💪 Health & Fitness
(3.3K)
free with in-app purchases
7
Welltory: Health, Heart Rate
Welltory: Health, Heart Rate
Welltory: Health, Heart Rate
Stress, Sleep, BP, O2 Monitor
Free

This app helps you understand your body's signals by analyzing heart rate variability and integrating data from over 1,000 devices and apps. It provides science-backed insights into sleep, stress, heart health, and activity to help you feel better and optimize your wellness.

Heart rate variability analysisSleep quality insightsStress monitoring
💪 Health & Fitness
(130K)
freemium
8
Stress Monitor for Watch
Stress Monitor for Watch
Stress Monitor for Watch
HRV Tracker & Health Insights
Free

Monitor your stress, activity, and sleep using your Apple Watch data. Gain insights into your body's signals like HRV and resting heart rate to understand what impacts your well-being. Receive personalized recommendations for better mental, emotional, and physical performance.

Stress monitoringHRV and Resting Heart Rate analysisActivity and sleep tracking
💪 Health & Fitness
(8.8K)
freemium
9
Muscle & Motion: Strength
Muscle & Motion: Strength
Muscle & Motion: Strength
Master Exercise Anatomy
Free

Explore exercise anatomy with interactive 3D animations. Understand muscle engagement, biomechanics, and common mistakes to train smarter and reduce injury risk. Access a vast library of exercises and educational content.

Interactive 3D anatomy model3D exercise anatomy libraryMuscle and joint involvement visualization
💪 Health & Fitness
(7.7K)
free with in-app purchases
10
Voice Dream - Natural Reader
Voice Dream - Natural Reader
Voice Dream - Natural Reader
Text to Voice - Read Aloud TTS
Free

Transform digital and scanned text into natural-sounding speech with advanced AI. Listen to PDFs, web pages, emails, and books with customizable voices and reading styles. Supports numerous document formats and cloud services.

AI Text-to-SpeechSupports PDF, Web, Email, eBooksCustomizable voices and languages
📚 Education
(14K)
free with in-app purchases
11
FITIV Monitorar Ritmo Cardíaco
FITIV Monitorar Ritmo Cardíaco
FITIV Monitorar Ritmo Cardíaco
Cronômetro de Atividade Física
Free

This app is a comprehensive health and fitness tracker that monitors workouts, heart rate, sleep, and recovery. It provides actionable insights to help users train smarter and achieve their fitness goals.

Heart rate zone trainingHRV and recovery trackingSleep monitoring
💪 Health & Fitness
(13K)
free with in-app purchases
12
Lyfta: Gym Workout Tracker Log
Lyfta: Gym Workout Tracker Log
Lyfta: Gym Workout Tracker Log
Weight Lifting Routine Planner
Free

This app helps gym-goers track their workouts, build custom routines, and monitor strength progress. It features a large exercise library with video guides, social features to connect with friends, and motivational challenges. Users can log sets, reps, weight, and PRs to achieve their fitness goals.

Workout loggingCustom routine builderProgress tracking
💪 Health & Fitness
(5.5K)
free with in-app purchases
13
Speechify – Text to Speech PDF
Speechify – Text to Speech PDF
Speechify – Text to Speech PDF
Voice AI Assistant, Read Aloud
Free

This app transforms text into spoken word with lifelike voices, reads documents, images, and articles aloud, and offers voice typing. It also features an AI assistant for summarizing and quizzing, and allows for AI podcast creation.

Reads text aloud from various sourcesVoice typing for faster inputAI assistant for summarization and quizzes
📊 Productivity
(495K)
free with in-app purchases
14
Aura: Meditation & Sleep, CBT
Aura: Meditation & Sleep, CBT
Aura: Meditation & Sleep, CBT
Mindfulness, Relaxation, Calm
Free

This app offers personalized mental wellness tools, including meditations, sleep stories, life coaching, and CBT. It uses advanced algorithms to tailor content to your needs, helping you find peace, reduce stress, and improve sleep. Join a community of millions and build a daily self-care habit.

Personalized mindfulness meditationsSleep tales and relaxation soundsCognitive Behavioral Therapy (CBT)
💪 Health & Fitness
(35K)
freemium
15
Bearable - Symptom Tracker
Bearable - Symptom Tracker
Bearable - Symptom Tracker
Mood, Health, Migraine, Period
Free

This app helps you understand and manage your health by tracking symptoms, triggers, and treatments. It allows you to identify patterns and correlations to gain better control over chronic illnesses, pain, mood, and more. Securely store and analyze your health data to share with your doctor.

Symptom trackingTrigger identificationMedication and treatment logging
💪 Health & Fitness
(5.8K)
free with in-app purchases
16
PeakWatch - AI Fitness Coach
PeakWatch - AI Fitness Coach
PeakWatch - AI Fitness Coach
HRV Training Recovery Sleep
Free

This app analyzes your health data to provide personalized training recommendations, recovery insights, and sleep analysis. It offers AI-powered explanations, body energy tracking, and stress monitoring to help you train smarter and feel healthier.

AI-powered insights and explanationsBody Energy and Stress trackingHRV-based Recovery analysis
💪 Health & Fitness
(2.5K)
freemium
17
ElevenReader: Read Books Aloud
ElevenReader: Read Books Aloud
ElevenReader: Read Books Aloud
Reader for Books, PDFs & Docs
Free

This app transforms any text into realistic, AI-powered audio narration. Listen to books, PDFs, documents, news, and blogs in over 32 languages with natural-sounding voices. Features include text highlighting, bookmarking, and flexible playback speeds.

AI-powered text-to-speechReads books, PDFs, and documents32+ languages with natural voices
📊 Productivity
(9.3K)
free with in-app purchases
18
MindDoc: Mental Health Support
MindDoc: Mental Health Support
MindDoc: Mental Health Support
Daily self-care & well-being
Free

This app supports mental well-being through mood tracking, journaling, and personalized courses based on CBT. It offers insights and feedback to help users manage common mental health challenges like anxiety and depression.

Mood trackingJournalingPersonalized CBT courses
💪 Health & Fitness
(12K)
free with in-app purchases
19
Spark Reading for Kids
Spark Reading for Kids
Spark Reading for Kids
Digital books for learning
Free

This app offers a digital library of age-appropriate books for children in grades 2-8 to improve reading skills. It features interactive comprehension questions, progress tracking, and stories aligned with school curricula. Users can listen to stories and follow along, making reading practice engaging and accessible.

Age-appropriate books (grades 2-8)Interactive comprehension questionsListen and follow along feature
📚 Education
(7.9K)
free with in-app purchases
20
Flex AI Workout Trainer & Log
Flex AI Workout Trainer & Log
Flex AI Workout Trainer & Log
Fitness Tracker & Gym Planner
Free

This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.

AI personal trainerReal-time form feedbackPersonalized workout plans
💪 Health & Fitness
(2.4K)
freemium