Best Theory Apps

249+ iOS apps curated and reviewed

4.7 avg rating
17 free apps
Updated September 2026

Out of 249+ theory apps on iOS, 17 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Theory Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1TheoryTheoryFree4.6★ (913)YesNoAug 2026
2Theory LessonsTheory Lessons$2.994.4★ (126)NoNoSep 2026
3Driving Theory Test 4 in 1 KitDriving Theory Test 4 in 1 Kit$5.994.8★ (753)YesYesSep 2026
4Driving Test Theory Kit 2026Driving Test Theory Kit 2026Free4.8★ (749)YesYesSep 2026
5UK Driving Theory PracticeUK Driving Theory PracticeFreeYesNoMay 2026
6Pocket TheoryPocket TheoryFreeNoNoMay 2026
7Theory Test ProTheory Test ProFree5.0★ (2)NoYesSep 2026
8Trinity Theory PracticeTrinity Theory PracticeFreeNoYesJul 2026

Top Picks for Theory

Theory#1

Theory by Theory LLC

Refreshed and ready to shop
Editor's Choice
🛍️ Shopping
4.6😞(913 ratings)
FreeAds
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Explore the latest fashion collections and shop exclusive styles from a renowned contemporary brand. Save desired items with a one-tap Wish List and receive timely updates on new arrivals and sales through push notifications.

What We Love

  • 🚀 Fast and easy to navigate
  • 👍 Intuitive and user-friendly
  • 💡 Useful features like wishlist and in-app discounts

Room to Improve

  • 🐛 Frequent crashes and glitches
  • ⏱️ Slow loading times and performance issues
  • 🔍 Inconsistent search and filtering functionality
  • 🔑 Difficulty signing in and account management
  • 💰 Promo codes and discounts not working as expected
Theory Lessons#2

Theory Lessons by musictheory.net

Strong Contender
🎵 Music
4.4😊(126 ratings)
$2.99
#11in Music
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Explore 39 animated music theory lessons covering fundamental concepts like scales, chords, and intervals. Deepen your understanding of musical structure and analysis with this comprehensive resource.

What We Love

  • 🚀 Efficient and easy to use
  • 👍 Clear and concise explanations
  • 💡 Helpful visual aids and animations
  • 🤩 Excellent learning tool for beginners
  • 🔍 Comprehensive coverage of music theory

Room to Improve

  • 🐛 Audio issues on some devices
  • 🔍 Limited content compared to website
  • 🤔 Keyboard-centric approach may not suit non-pianists
  • 💰 Paid app when website is free
Driving Theory Test 4 in 1 Kit#3

Driving Theory Test 4 in 1 Kit by Driving Test Success Limited

2026 UK's No.1 - 97% pass rate
Worth Considering
📚 Education
4.8(753 ratings)
$5.99AdsIn-App Purchases
#74in Education
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Prepare for your UK driving theory test with comprehensive revision materials. Practice questions, mock tests, hazard perception, and the Highway Code are included to help you pass on your first attempt. Track your progress and get support tailored to your learning needs.

More Theory apps to explore

FAQ about Theory

What are the best theory apps for iPhone?
Theory tops our theory apps ranking as of September 2026, with a 4.6-star average from 913 App Store ratings, and it's free to download.
Yes — 17 of the top theory apps we rank are free to download, including Theory and Driving Test Theory Kit 2026.
Theory shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 249+ theory apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app allows you to discover the brand's fashion collections, shop for exclusive styles, and access sales. You can also conveniently browse items, check your order status, and find nearby store locations.
The app features a new Wish List function. You can save items you are interested in with just a single tap, making it easy to keep track of your desired products.

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