Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Reading Apps

CommonLit vs ReadTheory

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score CommonLit #5 in Reading Apps 8.9/10 Free plan Free plan✓ 2 of 4 features Visit CommonLit
ReadTheory #10 in Reading Apps 8.5/10 Free plan Free plan✓ 1 of 4 features Visit ReadTheory

CommonLit leads on 0 checks, ReadTheory on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCommonLit · 8.9/10
  • Free planboth
  • Most featuresCommonLit · 2 of 4

CommonLit scores higher on our rubric for reading apps: 8.9 against 8.5 out of 10; our editors rank them #5 and #10.

CommonLit is the better fit for teachers and schools teaching grades 3–12. ReadTheory is the better fit for schools needing adaptive comprehension practice.

  • CommonLit fits best

    Teachers and schools teaching grades 3–12

  • ReadTheory fits best

    Schools needing adaptive comprehension practice

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature CommonLit 8.9/10 Visit ↗ ReadTheory 8.5/10 Visit ↗
At a glance
Editor score 8.9 8.5
Ranking #5 in Reading Apps #10 in Reading Apps
Best for Teachers and schools teaching grades 3–12 Schools needing adaptive comprehension practice
Pricing model Free plan + paid Free plan + paid
Starting price $4,000/yr $40/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud, Desktop, Mobile
Platforms Web Web, Windows, macOS, iOS, Android
Integrations 4 integrations 6 integrations
Features CommonLit 2/4 · ReadTheory 1/4
Phonics instruction Not checked yet Not checked yet
Comprehension practice ✓ ✓
Fluency practice ✓ (best) Not checked yet
Offline access — —
Specs
Age range Grades 3–12 K–12, ESL, SPED, and adult education
Content format Mixed Mixed
Supported platforms web web, Windows, macOS, iOS, Android
Our review
Pros
  • Thousands of literary and informational texts for grades 3–12
  • Standards-aligned lessons with comprehension checks and annotations
  • Google Classroom, Canvas, Clever, and ClassLink integrations
  • Adaptive passages match practice to student reading levels
  • Reports include Lexile and grade-level measures
  • Printable materials support digital and classroom instruction
Cons
  • Student access is web-based rather than through a fully offline app
  • The free plan does not include school-level dashboards or assessments
  • Not designed as a phonics-verification tool
  • Basic limits quizzes per week and progress history
  • School Champion supports one staff member and 40 students
  • Offline access is not available
Our verdict

CommonLit is a nonprofit educational platform for teachers and students in grades 3–12. Its free Text Library includes thousands of literary and informational texts, while standards-aligned reading and ELA lessons support classroom…

Read the review →

ReadTheory is a reading practice platform for K–12, ESL, special education, and adult learners. Its core experience combines adaptive passages, comprehension quizzes with immediate feedback, benchmark assessments, progress tracking, and…

Read the review →
  1. CommonLitReading Apps 8.9Free plan
  2. ReadTheoryReading Apps 8.5Free plan

Strengths and trade-offs

  • CommonLit — where it wins

    • Thousands of literary and informational texts for grades 3–12
    • Standards-aligned lessons with comprehension checks and annotations
    • Google Classroom, Canvas, Clever, and ClassLink integrations

    Where it doesn't

    • Student access is web-based rather than through a fully offline app
    • The free plan does not include school-level dashboards or assessments
    • Not designed as a phonics-verification tool

  • ReadTheory — where it wins

    • Adaptive passages match practice to student reading levels
    • Reports include Lexile and grade-level measures
    • Printable materials support digital and classroom instruction

    Where it doesn't

    • Basic limits quizzes per week and progress history
    • School Champion supports one staff member and 40 students
    • Offline access is not available

More comparisons

All reading apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update