Keyword Understanding vs Clusters Complex Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keyword Understanding
This app helps users of all ages improve their ability to understand spoken and written directions. It features various activities targeting vocabulary, basic concepts, and sequential instructions, making it beneficial for individuals with listening comprehension or processing difficulties.
- Follow spoken and written directions
- Improve vocabulary and basic concepts
- Target auditory attention and working memory
- Activities for one and two-step directions
- Temporal and sequential direction practice
- Comprehension check for vocabulary and concepts
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“This app is great for children with processing difficulties which need to improve their ability to follow directions with a variety of embedded concepts.” ~ Smart Speech Therapy blog “Every child I have used it with has been very engaged by the lovely, brightly-colored pictures, and has quite happily kept on listening and following the instructions.” ~ Speech Blog UK “It can be used for informal assessments, language therapy and home practice. It can also be used to target auditory attention and working memory for cognitive-communication goals.” ~ Speaking of Apps blog Keyword Understanding is a professional speech and language therapy app that targets the ability to understand sentences and follow spoken and written directions of increasing difficulty. Children and adults are asked to follow directions in their everyday lives. In order to follow directions, the child or adult requires a strong knowledge of vocabulary, basic concepts and the ability to process and retain the information they have listened to or read. WHO IS KEYWORD UNDERSTANDING FOR? - Parents - Teachers - Speech language pathologists / Speech and language therapists - Children with reduced attention and listening comprehension or auditory processing difficulties - Children with receptive language delay, developmental language delay or autism - Adults with mild to moderate aphasia due to stroke or traumatic brain injury - Adults with cognitive-communication difficulties due to stroke or traumatic brain injury WHAT COMPREHENSION ACTIVITIES ARE INCLUDED IN KEYWORD UNDERSTANDING? Comprehension Check: This activity helps you identify where comprehension breaks down. It checks the understanding of individual vocabulary items, and the basic concepts of size and color. Object, Size & Color: This activity works on the understanding of the basic concepts of size and color as well as the ability to follow one and two-step directions of increasing difficulty. 2 keyword level: Touch the green car 3 keyword level: Touch the big red mug 4 keyword level: Touch the green vase and the yellow cushion 6 keyword level: Touch the small pink gloves and the big blue comb Before & After: This activity works on the ability to understand and follow temporal directions (directions which include the concepts before/after in a variety of positions in the sentence). “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”. First & Then: This activity works on the ability to understand and follow sequential directions (directions which include the concepts first/then in the sentence). “First touch the ladder, then touch the bike”. WHAT LANGUAGE & COGNITIVE SKILLS DOES KEYWORD UNDERSTANDING TARGET? - Vocabulary - Listening / Auditory Comprehension - Reading Comprehension - Working Memory - Attention to Detail - Language Processing - Basic Concepts / Adjectives (size, color) - Temporal Directions (Before/After) - Sequential Directions (First… Then) FEATURES 3 modes: - Listening/ Auditory Only: Match the spoken direction to the picture(s) - Reading Only: Match the written direction to the picture(s) - Listening and Reading: Match the spoken and written directions to the picture(s) Keyword Understanding lets you: - Choose from a variety of vocabulary items in different sizes and five different colors allowing for thousands of following directions tasks - Follow directions of increasing difficulty and length - Add individual user profiles - Automatically track correct and incorrect responses of each user - Email a detailed result summary after a session or at a later date - Receive audio feedback for correct answers only, incorrect answers only or both All Aptus Speech Therapy apps participate in the 50% off Volume Purchase Program. Visit our website for more details about our other speech and language therapy apps.
Clusters Complex Pro
This app helps children practice complex consonant clusters in English words, phrases, and sentences. It offers engaging themes, randomization, and progress tracking for speech-language pathologists and young learners.
- Complex consonant cluster practice
- 88 words, 440 phrases, 440 sentences
- Over 30 themed categories
- Randomization option
- Progress monitoring and data collection
- Audio recordings for review
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***NEW SALE PRICE $24.99 (REGULARLY $34.99)*** ***ADDITIONAL 50% OFF WITH VOLUME / EDUCATIONAL DISCOUNT*** Welcome to the Clusters Complex! Our app targets the ten most complex clusters, including three-element clusters and complex two-element clusters. It includes 968 photographs depicting 88 words, 440 phrases and 440 sentences. Children may select motivating themes based on specific animals, activities and sports. A randomization option presents the photographs in mixed order. Furthermore, children can engage in self-monitoring and view short reward videos if they achieve a high level of accuracy. SLPs have the option to monitor progress through recordings and data collection over time, all of which can be backed up on a computer or emailed. All words in this app were carefully selected for the above complex clusters. Ideally, the targets also include early-developing sounds in the medial or final word position. For instance, among /skw-/ words are “squad,” “squeaky” and “squeeze.” We did not select “square” or “squabble” because the final sounds may distract from the challenging initial clusters. Additionally, the phrases and sentences were judiciously chosen. As much as possible, they are loaded with early-developing sounds so that the child may focus on the cluster target. For example, the /fl-/ phrase “white floppy hat” allows the child to focus on the /fl-/ target because it is surrounded by the early sounds, /w t p h/. Likewise, the /fl-/ sentence “We took a flight to Maine” provides a facilitative context. • Features CC and sCC clusters (/θr-/, /fl-/, /fr-/, /sl-/, /shr-/, /str-/, /skr-/, /spr-/, /skw-/, /spl-/) • English targets – Words (88) – Phrases (440) – Sentences (440) • Colorful photos and videos • Over 30 themes (sports, animals, activities) for students to choose from; each comes with its own customized buttons, backgrounds, and reward videos • Randomization option • Self-monitoring • Progress monitoring • Customized messages for students • Data collection features include audio recordings which can be emailed, backed up to computer, or stored on your Apple device
Screenshots
Verdict
Keyword Understanding and Clusters Complex Pro both sit at 5.0 stars, but that hides the real split: 100% of Clusters Complex Pro's written reviews are positive against 25% of Keyword Understanding's. Clusters Complex Pro also leads on update cadence (every 10 days vs every 10 months) and iOS requirement (10.3 vs 15.0). Keyword Understanding's advantage is price ($17.99 vs $24.99) and ratings volume (3 vs 1). On rating, ads, in-app purchases and monetization model 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
Keyword Understanding costs $17.99 and Clusters Complex Pro $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Keyword Understanding against 5.0 for Clusters Complex Pro. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews are what separate them: 25% of Keyword Understanding's written reviews are positive against 100% of Clusters Complex Pro's.
Keyword Understanding ships an update every 10 months, Clusters Complex Pro every 10 days. The most recent releases landed on September 3, 2026 and June 1, 2026 respectively.
| Parameter | Keyword Understanding | Clusters Complex Pro |
|---|---|---|
| Price | $17.99 — better | $24.99 |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | 25.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 10 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 10.3 — better |
| Further details — not scored | ||
| Size | 64 MB | 472 MB |
| Age rating | 4+ | 4+ |
| Developer | Aptus Speech and Language Therapy Limited | SLPath LLC |
Customer experience
Keyword Understanding
Clusters Complex Pro
In-app purchases
Keyword Understanding
No in-app purchases
Clusters Complex Pro
No in-app purchases
Questions
Is Keyword Understanding free?
Is Clusters Complex Pro free?
Which has better reviews, Keyword Understanding or Clusters Complex Pro?
Do Keyword Understanding or Clusters Complex Pro have ads?
Which is updated more often, Keyword Understanding or Clusters Complex Pro?
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