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Best The 100 Principles Apps

164+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated May 2026

Finding the right the 100 principles app can be overwhelming with so many options. We've analyzed 164+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for The 100 Principles

Principles In Action#1

Principles In Action by PRIOS, LLC

By Ray Dalio
Editor's Choice
📚 Education
4.9😊(6.1K ratings)
Free
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Experience Ray Dalio's insightful teachings from his best-selling book through the Principles In Action app. Explore practical applications of life principles and enhance your decision-making abilities. Download now to bring these powerful concepts to life in your daily routines.

What We Love

  • 💡 Excellent content and resources
  • 👍 Helpful for self-development and growth
  • 🚀 Seamless integration with book
  • 🤩 Life-changing insights

Room to Improve

  • 🐛 Crashes and loading issues
  • 🔒 Privacy concerns with data sharing
  • 🔍 Difficulty accessing saved progress
Khan Academy#2

Khan Academy by Khan Academy

You can learn anything
Strong Contender
📚 Education
4.6😊(103K ratings)
FreeAds
#59in Education
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Khan Academy screenshot 6

Learn anything, for free, with thousands of interactive exercises and videos covering math, science, economics, and more. Practice exercises with instant feedback, download content for offline learning, and track your progress seamlessly across devices. Join Khan Academy for a personalized, mastery-based learning experience.

What We Love

  • 🚀 Impeccable app
  • 👍 Very easy to learn with
  • 👍 Great for learning math
  • 👍 Excellent math program

Room to Improve

  • 🐛 New writing system issues
  • 🐛 Incorrect grammar
  • 🐛 Bugs and glitches
GRE Prep & Practice by Magoosh#3

GRE Prep & Practice by Magoosh by Magoosh

Math & Verbal Questions, Tests
Worth Considering
📚 Education
4.8😊(11K ratings)
FreeAdsIn-App Purchases
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Prepare for the GRE exam with our comprehensive application offering practice tests, flashcards, and study materials to help you excel in your GRE preparation. Elevate your scores and achieve your educational goals with our user-friendly study tool. Get ahead in your GRE journey today!

What We Love

  • 📚 Comprehensive GRE prep content
  • 💻 Convenient on-the-go learning
  • 🎓 Helpful video explanations
  • 🔍 Detailed practice questions

Room to Improve

  • 🐛 Buggy app performance (crashes, freezes, missing features)
  • 🔍 Lack of customization options for practice sessions
  • 🔊 Distracting audio/video issues in some lessons

More The 100 Principles apps to explore

4
Sharpen - College Exam Prep
Sharpen - College Exam Prep
Sharpen - College Exam Prep
Quizzes, Videos & Flashcards
Free

A college study app offering quizzes, videos, flashcards, and study materials to help students succeed. Study smarter with interactive features and boost your grades effortlessly.

📚 Education
(3K)
5
Knowunity: AI Study & Homework
Knowunity: AI Study & Homework
Knowunity: AI Study & Homework
Schule-Lernzettel-SchoolGPT
Free

Access a free study platform where you can chat with friends, use flashcards, take quizzes, and earn volunteer hours and merchandise while improving your grades. Covering all subjects from middle to high school and AP® exams, Knowunity is your go-to for faster learning and a supportive community. Join now to boost your knowledge and connect with over 8 million students!

📚 Education
(4.3K)
6
Math.
Math.
Math.
Math Help with a Tutor
Free

Get personalized math help with a vast library of courses for elementary to college-level math and standardized test prep. Features video examples, interactive practice, and self-tests. Start your 3-day free trial now!

📚 Education
(1.3K)
7
Pearson+ | Study Prep & eTexts
Pearson+ | Study Prep & eTexts
Pearson+ | Study Prep & eTexts
eTexts, Videos and Practice
Free

Access your eTextbooks and video explanations on the go with this app. Features include note-taking, audiobooks, flashcards, and personalized study tools. For support or feedback, contact Pearson at PearsonPlusFeedback@pearson.com.

📚 Education
(58K)
8
StudyPug — Expert Math Tutors
StudyPug — Expert Math Tutors
StudyPug — Expert Math Tutors
Simple Math in Plain English
Free

Get expert math help in simple, easy-to-follow lessons covering algebra, calculus, statistics, and more, all aligned with common core standards. Improve your math skills with step-by-step tutorials and test prep guidance tailored to your needs.

📚 Education
(2.1K)
9
Principles of Economics
Principles of Economics
Principles of Economics
by Apps Resource Centre, Hong Kong Baptist University
Free

This study app helps students learn economics with concise explanations, illustrations, and interactive tools, covering key concepts, theories, and models in micro and macroeconomics. It offers self-assessments, interactive diagrams, and video animations to reinforce learning and improve recall of important economic terms and concepts.

📚 Education
(8)
10
GED & Me™
GED & Me™
GED & Me™
The official GED® Mobile App
Free

Discover a comprehensive educational platform offering a wide range of learning resources, including courses, quizzes, and interactive tools. Enhance your knowledge and skills in various subjects while tracking your progress and engaging with a vibrant online learning community. Start your learning journey today!

📚 Education
(8.2K)
11
Chegg Study - Homework Help
Chegg Study - Homework Help
Chegg Study - Homework Help
Expert Answers & College App
Free

Get expert answers to your homework questions and study smarter with the Chegg Study app. Access step-by-step solutions and live expert help 24/7. A must-have tool for all students aiming to excel in their academics.

📚 Education
(205K)
12
Official GMAT | Manhattan Prep
Official GMAT | Manhattan Prep
Official GMAT | Manhattan Prep
Study & Practice for MBA 2026
Free

This application is a dedicated platform for preparing for the GMAT exam, offering a wide range of study materials, practice tests, and resources to help you succeed. Get ready to ace the GMAT with our comprehensive prep tools!

📚 Education
(2.4K)
13
Study.com
Study.com
Study.com
Online Courses & Homework Help
Free

Access a diverse range of online courses covering various subjects and levels of difficulty, conveniently learn at your own pace with interactive lessons and assessments. Start expanding your knowledge today with our user-friendly platform.

📚 Education
(3.7K)
14
SAT®: Practice,Prep,Flashcards
SAT®: Practice,Prep,Flashcards
SAT®: Practice,Prep,Flashcards
Learn & Practice the SAT® exam
Free

Study conveniently with SAT®: Practice, Prep, Flashcards. Enhance your skills with practice exams and flashcards to excel in your SAT preparation. Start improving today!

📚 Education
(1.7K)
15
GRE® Test Prep by Galvanize
GRE® Test Prep by Galvanize
GRE® Test Prep by Galvanize
100s of GRE practice questions
Free

Get ahead in your GRE preparation with hundreds of practice questions on the top-rated GRE test prep app. Join countless students acing their GRE exams and fulfilling their academic dreams. It's time to elevate your GRE game!

📚 Education
(206)
16
Studocu: Notes & Practice
Studocu: Notes & Practice
Studocu: Notes & Practice
Trusted help for your classes
Free

Study Notes is a user-friendly app with a vast collection of study materials, lecture notes, and educational resources for students of all levels. Boost your learning experience and ace your exams with this comprehensive study tool.

📚 Education
(873)
17
Varsity Tutors Live Tutoring
Varsity Tutors Live Tutoring
Varsity Tutors Live Tutoring
by Varsity Tutors LLC
Free

Get instant access to qualified tutors anytime with the Varsity Tutors Live Tutoring app. Students can receive video tutoring, practice questions, and instant help in various subjects, while tutors can provide sessions, invoice, and communicate with students seamlessly. Download now for live expert help in over 70 subjects.

📚 Education
(39K)
18
TeachTap
TeachTap
TeachTap
Ace the SAT & AP with AI Prep
Free

Prepare for the SAT exam with TeachTap, a comprehensive study tool that offers practice questions, real-time feedback, and personalized study plans. Maximize your SAT score potential today!

📚 Education
(881)
19
Algebra
Algebra
Algebra
Algebra Help with a Tutor
Free

Get personalized Algebra help with a complete curriculum from YourTeacher. Access video lessons, practice tests, quizzes, worksheets, and more with a personal math teacher. Start your 3-day free trial now!

📚 Education
(1.1K)
20
StudyX: AI Homework & Study
StudyX: AI Homework & Study
StudyX: AI Homework & Study
Math Solver & AI Tutor
Free

Get instant homework help and connect with a community of peers for academic support. Join StudyX now to ace your assignments!

📚 Education
(941)

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