† Pricing note: Prices are checked against each vendor's official website or help center at the time of writing, but vendors change plans and prices at any time. Always confirm current pricing on the vendor's own site before purchasing. How we review and verify →
1
Starfall
Best phonics + sight words
Starfall teaches reading through systematic phonics with engaging activities for Pre-K through 5th grade.
Best for:Systematic phonics paired with sight word recognitionPrice:$35/yr†✓ verified 2026-07-29Grades:Pre-K-5Platforms:Web, iOS, Android
Pros
Affordable
Good for early readers
Systematic phonics approach
Cons
Limited for older students
Dated interface
2
Khan Academy Kids
Best all-in-one free
Khan Academy Kids offers free, comprehensive early learning content covering reading, math, and more for children ages 2-8.
Best for:Free comprehensive early learning including sight wordsPrice:Free†Grades:Ages 2-8Platforms:iOS, Android, Amazon
Pros
Completely free
Comprehensive curriculum
No ads
Cons
Only goes to age 8
Not specialized for spelling
No web version
Our pick
3
SpellingJoy Reading
Best for a true beginner
SpellingJoy Reading is a learn-to-read app for ages 4 to 8. The child picks a buddy, and that buddy says the sound, shows the letter, and waits for them. It teaches synthetic phonics one sound at a time in the same sequence as UFLI Foundations: 360 lessons across Sound Start, First Words and Sound Teams, plus the heart words learned along the way. A child who does not know a single letter starts at the first sound; a child who knows some passes those lessons quickly. Finished lessons earn stars, and stars buy furniture for the buddy's room. Parents get a weekly summary. It is new, so it has a much shorter track record than the programs above it.
Best for:Starts at the very first sound, ages 4-8, in any browser (7 days free, then $19.90/mo)Price:7 days free, then $19.90/mo or $99/yr†Grades:PreK-2Platforms:Web
Pros
Starts at the first sound - a child who knows no letters is not stranded
Follows the same sequence as UFLI Foundations, 360 lessons in three courses
A buddy the child picks says the sound, shows the letter, and waits - no timer
Cons
Web only - no native iOS or Android app
Ages 4-8 - a fluent reader will outgrow it
Subscription after the trial ($19.90/mo or $99/yr)
4
HOMER
Best personalized
HOMER creates personalized reading journeys for children ages 2-8 based on their interests and skill level.
Best for:Adaptive sight word learning tailored to each childPrice:$80/yr†Grades:Ages 2-8Platforms:iOS, Android
Pros
Personalized learning path
Comprehensive reading program
Good for early readers
Cons
Expensive
Limited age range
Our pick
5
SpellingJoy
Best free
SpellingJoy is a 100% free spelling practice platform for K-6 students. Unlimited spelling games, unlimited tests, 134+ word lists, custom list creation, and progress tracking - all completely free with no subscriptions and no hidden costs.
Best for:Free unlimited sight word practice with Dolch & Fry listsPrice:100% Free†Grades:K-6Platforms:Web
Pros
100% free - unlimited games, tests, and lists
No subscription or hidden costs ever
K-6 curriculum with 134+ word lists
Cons
Web-only (no native mobile apps yet)
Classroom features coming soon
6
ABCmouse
Best curriculum
ABCmouse offers a full early learning curriculum with thousands of activities for children ages 2-8.
Best for:Full early reading curriculum with embedded sight wordsPrice:$45-59/yr†✓ verified 2026-07-29Grades:Ages 2-8Platforms:All platforms
Pros
Comprehensive curriculum
Engaging content
Progress tracking
Cons
Only to age 8
7
Teach Your Monster to Read
Best gamified
Teach Your Monster to Read uses a game-based approach to teach systematic phonics. Free on web, $4.99 mobile app. Covers first 2 years of learning to read.
Best for:Award-winning phonics game that builds sight word fluencyPrice:Free (web) / $8.99 (app, moving to subscription)†✓ verified 2026-08-07Grades:Pre-K-1 (Ages 3-6)Platforms:Web (free), iOS ($8.99), Android ($8.99), Amazon
Pros
Completely free on desktop
BAFTA award-winning
Systematic synthetic phonics
Cons
Limited age range (3-6)
British accent audio
Mobile apps not free
8
Duolingo ABC
Best for beginners
Duolingo ABC teaches phonics and early reading skills through interactive lessons for children ages 3-8.
Best for:Free bite-sized sight word and phonics lessonsPrice:Free†Grades:Ages 3-8Platforms:iOS, Android, Amazon
Pros
Completely free
No ads
Well-designed interface
Cons
Limited age range
Not spelling-specific
No web version
Frequently asked questions
How many sight words should a kindergartener know?
By the end of kindergarten, most children are expected to recognize 20-50 sight words. The Dolch pre-primer and primer lists contain 93 words that cover about 50% of all text young children encounter.
What is the difference between Dolch and Fry sight words?
Dolch sight words (220 words) were compiled in 1936 and are organized by grade level. Fry sight words (1,000 words) were updated in 1980 and are organized by frequency. Both lists overlap significantly for kindergarten-level words.
Are free sight words apps as effective as paid ones?
Yes. Apps like SpellingJoy and Khan Academy Kids offer high-quality sight word practice completely free. The key is consistent daily practice of 10-15 minutes, not the price of the app.
How often should my kindergartener practice sight words?
Short, daily sessions of 10-15 minutes are more effective than longer, infrequent sessions. Consistent practice 5 days a week helps move sight words from short-term to long-term memory.
Our Verdict
Starfall is our top pick for kindergarten, pairing systematic phonics with sight word recognition so the two build on each other.
If you want a broader early learning experience, Khan Academy Kids is an excellent free option that covers sight words alongside math and social-emotional skills.
For families willing to invest in a personalized reading program, HOMER adapts its sight word instruction to each child's level and interests. SpellingJoy is the best free pick of the group, because it includes both Dolch and Fry sight word lists completely free, with unlimited practice games and progress tracking at no cost. More early literacy titles sit in our reading and phonics app library.
ST
About the Author
SpellingJoy Team
The SpellingJoy team is dedicated to creating free, high-quality spelling resources for K-6 students and their families. We test every app we review and provide honest assessments to help parents make informed decisions.