S, Z, & S Blends vs Feature Function Class
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
S, Z, & S Blends
This interactive game, designed by a speech therapist, helps children aged 3-12 improve their 'S' and 'S' blend sound production. It features over 350 target words with vibrant illustrations and full narration to enhance articulation and language skills.
- Improves 'S' and 'S' blend sound production
- Over 350 target words
- Full narration by a Speech Therapist
- Interactive graphics and animations
- Addresses articulation and language skills
- Suitable for ages 3-12
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This game was designed by a speech therapist to improve your child’s S and S blend sound production while keeping them entertained with fun interactive graphics. Target sounds are presented in initial, medial, and final positions in 1-3 syllable words. This game not only addresses articulation but can also improve your child’s receptive and expressive language skills. S Blends covered are: Sp, Sm, Sn, Sw, St, Ts, Sk, Ks, Sl, Ls Features: Over 350 target words Full narration by a Speech Therapist Interactive graphics Vibrant, hand-drawn illustrations and animations Perfect for children ages 3-12
Feature Function Class
This visual teaching tool aids educators, therapists, and parents in developing receptive language and categorization skills. It uses a proven methodology to present images and test identification based on features, functions, and classes. The app offers a large image library, smart filtering, and customization options for personalized training.
- 300+ pre-tagged images
- Smart filtering by feature, function, or class
- Shuffle and Reorder modes for varied practice
- Adjustable grid size for difficulty scaling
- Save and load custom image sets
- Import and tag personal photos
- Create custom tags
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Feature Function Class is a powerful visual teaching tool designed for educators, therapists, and parents working on receptive language and categorization skills. Built specifically for Feature-Function-Class (FFC) training, this app streamlines the process of presenting images and testing identification skills. WHAT IS FEATURE-FUNCTION-CLASS? Feature-Function-Class is a proven teaching methodology used in Applied Behavior Analysis (ABA) therapy and early childhood education. It helps learners identify and categorize objects by: - Features — What you SEE (color, shape, parts) - Functions — What it DOES or how you USE it - Classes — What CATEGORY it belongs to HOW IT WORKS Select any Feature, Function, or Class filter and the app instantly displays a set of images — with one image always matching your selected criteria. This creates natural teaching opportunities and quick identification trials. KEY FEATURES ◆ 300+ Pre-Tagged Images Start immediately with a library of high-quality, royalty-free images professionally tagged with features, functions, and classes. ◆ Smart Filtering Filter by Feature (spots, red, round), Function (cuts, you sit on it), or Class (animals, furniture, food). Combine filters to narrow results. ◆ Shuffle Mode Keep training fresh — Shuffle loads new images while always maintaining one that matches your filter. Cycle through your entire library without losing focus on the training target. ◆ Reorder Mode Test true recognition — Reorder keeps the same images but shuffles their positions. Perfect for confirming the learner recognizes the target, not just its location on screen. ◆ Adjustable Grid Size Scale difficulty from 2 to 8 images. Start simple and increase complexity as skills improve. ◆ Save & Load Sets Working with a client over multiple sessions? Save your image set once and reload it instantly. Maintain consistency across training sessions. ◆ Import Your Own Photos Add personal photos and tag them with custom features, functions, and classes. Include familiar objects, family members, or items specific to your learner's environment. ◆ Custom Tags Create your own feature, function, and class tags to extend the built-in library and personalize training. DESIGNED FOR - ABA Therapists & BCBAs - Speech-Language Pathologists - Special Education Teachers - Early Intervention Specialists - Parents supporting skill development at home Whether you're running discrete trials, building receptive vocabulary, or working on categorization skills, Feature Function Class gives you the tools to create effective, engaging training sessions.
Screenshots
Verdict
The clearest difference is price: Feature Function Class at Free against S, Z, & S Blends's $2.99. Feature Function Class also leads on rating (5.0 vs 1.0) and update cadence (every 2 months vs every 4 months). S, Z, & S Blends's advantage is iOS requirement (11.0 vs 18.6). On ratings volume, ads, in-app purchases and device support 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
Feature Function Class is free to download; S, Z, & S Blends costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Feature Function Class holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
S, Z, & S Blends ships an update every 4 months, Feature Function Class every 2 months. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.
| Parameter | S, Z, & S Blends | Feature Function Class |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.0 (2 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 71 MB | 101 MB |
| Age rating | 4+ | 4+ |
| Developer | Preferred Mobile Applications, LLC | JudeWorks |
Customer experience
S, Z, & S Blends
Feature Function Class
In-app purchases
S, Z, & S Blends
No in-app purchases
Feature Function Class
No in-app purchases
Questions
Is S, Z, & S Blends free?
Is Feature Function Class free?
Which has better reviews, S, Z, & S Blends or Feature Function Class?
Do S, Z, & S Blends or Feature Function Class have ads?
Which is updated more often, S, Z, & S Blends or Feature Function Class?
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