Comparison

Comprehension Builder. vs Keywords Understanding Lite

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Comprehension Builder.

This app helps users improve reading comprehension, working memory, and the ability to answer questions about text. It features incremental learning with texts that increase in length and difficulty as skills develop, along with a reward system for motivation. Designed for learners of all ages, including those with special needs or learning English.

Highlights
  • Passage comprehension practice
  • Working memory development
  • Answering multiple-choice questions
  • Incremental learning levels
  • Reward Center for motivation
  • 200+ fiction and non-fiction texts
  • Content designed by teachers
Features
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** Happy Frog Apps is a Mom’s Choice Award Winner! Also featured on FunEducationalApps.com, TeachersWithApps.com, and more! ** The “Comprehension Builder” app builds skills in passage comprehension, working memory and answering multiple choice questions about a text. What parents say about our awesome apps: *** 5 stars! Brilliant! An app that understands how kids actually learn. Thank you. *** 5 stars! Every one of your apps that I’ve tried is great! When using “Comprehension Builder”, your learner will first read a passage. The learner must then hold the information in memory in order to answer a multiple choice question. To build sustained attention and working memory, early levels contain 2-sentence texts with limited word count. As comprehension is demonstrated and memory increases, the texts increase in length and difficulty. “Comprehension Builder” contains 200+ fiction and non-fiction texts on a variety of topics. This app is perfect for learners who: - when reading or listening, information seems to ‘go in one ear and out the other.’ - have trouble responding to questions about a text unless they can refer back to the text. - can understand each sentence, but don’t seem to put them together to make meaning from the text as a whole. Additional Features: - Incremental learning. New levels are unlocked only when your child demonstrates mastery. - Fun and engaging Reward Center to increase motivation. - Contains over 600 questions, with content designed by professional teachers and researchers. Our apps are designed for and tested by typical and special needs children. Testers include children with Autism and other special needs. Our apps work for them! Our apps are also suitable for adults dealing with aphasia or learning English as a Second Language. To evaluate the app, download the free version, which has 2 free levels. The remaining levels accessed with an in-app purchase. If you prefer no in-app purchases, download the School Edition (SE) version of this app, which includes all levels and up to 10 users. We take customer service very seriously! If you ever have a problem or find that we've missed something, contact us at our website and we will do our best to fix the problem.  www.HappyFrogApps.com Our apps are safe for kids. We collect NO private information in our app. None! Our apps do not allow unrestricted web or social media access. We conform to the Children's Online Privacy Protection Act.

About

Keywords Understanding Lite

This app offers a sample of speech and language therapy exercises focused on sentence comprehension. It helps users practice following directions, understanding basic concepts, and improving auditory and reading comprehension skills through interactive activities.

Highlights
  • Listening comprehension exercises
  • Reading comprehension exercises
  • Following directions (one/two-step, temporal, sequential)
  • Basic concepts (size, color)
  • Vocabulary understanding
  • Sample of full app features
Features
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Keywords Understanding LITE is a free version of Keyword Understanding. It gives you a sample of the content you would get in the full version. It allows you to see how the full version works and try it out for free. Keyword Understanding (the full app version) is a professional speech and language therapy app that works on sentence-level reading and listening comprehension. It also targets the understanding of vocabulary, basic concepts and the ability to follow directions of increasing keyword length. WHO IS KEYWORD UNDERSTANDING FOR? - Children with reduced attention and auditory processing difficulties - Children with language delay or disorder - Children with autism and language comprehension difficulties - Adults with aphasia and reading or spoken language comprehension difficulties after a stroke or traumatic brain injury - Adults with cognitive-communication difficulties due to stroke or brain injury WHAT LANGUAGE AREAS DOES KEYWORD UNDERSTANDING TARGET? FOLLOWING DIRECTIONS: Following directions is important in our everyday lives. In order to understand and follow directions, one needs a strong knowledge of basic concepts, vocabulary and the ability to process and retain spoken or written information in memory. BASIC CONCEPTS, ONE AND TWO STEP DIRECTIONS: Keyword Understanding works on the basic concepts of size and color as well as one and two-step directions of increasing length and difficulty e.g  - “Touch the red balloon” - “Touch the small green umbrella” - “Touch the yellow chair and the blue candle” - “Touch the big pink cupcake and the small green glasses”. TEMPORAL DIRECTIONS (BEFORE/AFTER): Keyword Understanding includes Temporal Directions tasks that target the child or adult’s ability to follow directions that include the concepts 'Before/After' in a variety of positions in the sentence. e.g  - “Before you touch the t-shirt, touch the phone” - “After you touch the lamp, touch the vase” - “Touch the flower before you touch the box” - “Touch the sock after you touch the bucket” SEQUENTIAL DIRECTIONS (FIRST…THEN): The app also includes Sequential Directions that target the child or adult’s ability to follow directions that include the concepts 'First ... Then' in the sentence. e.g  - “First touch the ladder, then touch the bike”. FEATURES OF KEYWORDS UNDERSTANDING LITE This FREE version, Keywords Understanding LITE allows you to sample each activity in the full version but it only includes 6 objects. The FULL version includes many more allowing for much more variety in each activity and many more trials. The full version also allows you to select and deselect vocabulary items in the Word List. 3 modes: - Listening Comprehension (Audio Only): Match the spoken direction to the pictures - Reading Comprehension (Text Only): Match the written direction to the pictures - Listening and Reading Comprehension (Audio and Text): Match the spoken and written directions to the pictures - Bright, colorful, real-life photos of common objects - 6 objects in five different colors and sizes. The full version has a large variety allowing for thousands of possible following directions tasks - 3 trials in each activity. The full version allows for up to 50 trials per session. - A comprehension check activity to find out where comprehension breakdown occurs - Audio feedback for correct answers only, incorrect answers only or both - Graded tasks of increasing difficulty - User profiles and result history - Automatic tracking of scores - Optional results summary via email - iOS voices (automatically selected based on your region). Download an enhanced iOS voice for best quality. All Aptus Speech Therapy apps participate in the 50% off Volume Purchase Program, so you can buy in bulk at a discounted price. Are you looking for a different kind of speech therapy app? Check out our full range of speech and language therapy apps for adults and children on the AppStore or on our website.

Screenshots

Comprehension Builder.4 screens
Keywords Understanding Lite4 screens

Verdict

The call

The clearest difference is rating: Keywords Understanding Lite at 5.0 against Comprehension Builder.'s 2.0. Keywords Understanding Lite also leads on in-app purchases (none vs 3). Comprehension Builder.'s advantage is iOS requirement (12.2 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Comprehension Builder. sells 3 one-off in-app purchases. Keywords Understanding Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Keywords Understanding Lite holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

Comprehension Builder. ships an update every 47 months, Keywords Understanding Lite every 68 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
Comprehension Builder. versus Keywords Understanding Lite: the parameters behind the verdict, then further details
ParameterComprehension Builder.Keywords Understanding Lite
PriceFreeFree
Rating2.0 (2 ratings)5.0 (3 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings23 — better
Update frequencyEvery 47 months — betterEvery 68 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.2 — better15.0
Further details — not scored
Size50 MB60 MB
Age rating4+4+
DeveloperJanine TooleAptus Speech and Language Therapy Limited

Customer experience

Comprehension Builder.

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

Keywords Understanding Lite

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Comprehension Builder.

One-time3
  • Two Users$1.99
  • All Levels$3.99
  • 10 Users$3.99
None

Keywords Understanding Lite

No in-app purchases

Questions

Is Comprehension Builder. free?
Comprehension Builder. is free to download, with in-app purchases available.
Is Keywords Understanding Lite free?
Keywords Understanding Lite is free to download, with no in-app purchases.
Which has better reviews, Comprehension Builder. or Keywords Understanding Lite?
Keywords Understanding Lite is rated higher. Comprehension Builder. averages 2.0 out of 5 from 2 ratings, while Keywords Understanding Lite averages 5.0 from 3 ratings.
Do Comprehension Builder. or Keywords Understanding Lite have ads?
Neither Comprehension Builder. nor Keywords Understanding Lite shows ads.
Which is updated more often, Comprehension Builder. or Keywords Understanding Lite?
Comprehension Builder. ships an update every 47 months, and Keywords Understanding Lite every 68 months. Most recently, Comprehension Builder. was updated on October 6, 2026 and Keywords Understanding Lite on October 8, 2026.

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