Articulation IV vs Inference Ace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Articulation IV
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Speech Therapy for school and home practice! Articulation IV has four of the most common articulation targets—R, S, L, and Th–in the Initial, Medial, Final positions and in Consonant Clusters. Buttons on the screen let you listen to the word, the sounds in the word, a short phrase containing the word, and three sentences. Sentence 1 may add another of the same target. Sentence 2 includes at least 2 of the same target sound and usually is a longer sentence. Sentence 3 likely has multiple target sounds (R, S, L, and/or Th) and will be semantically complex. A clear speech model is presented for the child to imitate and they can record and play back their own speech. The clinician can choose from three scoring methods. 1. Score each response as correct, distorted or incorrect. 2. Score responses as correct, distorted, substituted, or omitted. 3. Score productions based on whether they are spontaneously correct/incorrect or imitatively correct/incorrect. New vocabulary includes words not commonly found in yesterday’s word lists but necessary for today's classroom success such as: compost, awesome, LOL, USB port, browser, search engine, etc. Sort the words by target sound and position. You'll find curriculum-based words including: computer-related words, math, time & measurement, emotions, food, music, sports and games etc… This app uses the content from LocuTour’s Articulation IV CD. There are 475 words and photographs. There are: 85 words in /r/, 189 words in vowel controlled /r/, 212 words in /s/, /z/, 117 words in /l/, 49 words in voiced/voiceless /th/. Words may be in multiple phoneme groups.
Inference Ace
This app helps children in grades 2-5 improve their reading comprehension by teaching inference skills step-by-step. It features over 450 examples, a reward center, and guided learning to make practice engaging and effective.
- Step-by-step inference skill building
- Over 450 engaging examples
- Fun reward center for motivation
- Guided learning for less frustration
- Detailed reporting for up to 10 students
- Smart Sentence technology for varied examples
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** Winner of prestigious Mom's Choice Award! Featured on Appolicious.com, iHeartThisApp.com ** Inference Ace helps kids who have trouble with reading comprehension. The app builds inference skills step-by-step until mastery. ***** 5 Stars - Nice app for practicing inference. Tons of examples. ***** 5 Stars - My son struggles with comprehension and doesn't like reading long passages. This app teaches a high level of skill in a format he enjoys. Thanks! Inference Ace is targeted to children in Grades 2-5 who can read the words (decode), but don't understand what they read. With over 450 examples, a fun and engaging reward center to increase motivation, and content designed by professional teachers and researchers, this app is bound to capture the attention of your kids. Best of all, there is detailed reporting for up to 10 students to meet the needs of teachers, therapists and parents. Key Features: - Incremental learning. New levels are unlocked only when your child is ready. - Guided learning for less frustration. Your child will always be guided to the correct answer. - Fun and engaging Reward Center to increase motivation. - Contains over 450 examples, with content designed by professional teachers and researchers. - Inferences are taught from multiple perspectives: what inferences are possible, which are not possible, multiple inferences per sentence, etc. - Our own Smart Sentence technology is used to infinitely vary the examples to prevent learning by rote. - Advanced levels include timers to ensure fluency. Research shows fluency in the foundation skills is critical to reading comprehension. 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! This version of the Inference Ace app has access to all levels for up to 10 players. You can try this app by downloading the free version. The free version has 4 free levels for one player. You can purchase levels and players separately through in-app purchases. We are a member of the Moms with Apps program. We collect NO private information in our app, and our apps do not allow unrestricted web access. Inferencing is a key component of reading comprehension. If you can't infer fluently, you can't understand the story. Help your child now by getting started with our Inference Ace app. While you're at it, check out our other apps that target WH questions, identifying inference clues and identifying the main idea of a sentence or paragraph. 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. ** Note: Inference Ace and Inference Clues intentionally use similar data sets. However, different skills are targeted. Also, when working through this app, you will encounter different variants of the same examples many times as we teach our players to derive multiple inferences from a single sentence -- just like expert readers do. This is an intentional feature, not a bug :-)
Screenshots
Verdict
The clearest difference is chart position: Inference Ace at #194 against Articulation IV's unranked. Inference Ace also leads on price ($8.99 vs $9.99). On update cadence, 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
Articulation IV costs $9.99 and Inference Ace $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Articulation IV ships an update every 9 months, Inference Ace every 7 months. The most recent releases landed on September 11, 2026 and September 8, 2026 respectively.
| Parameter | Articulation IV | Inference Ace |
|---|---|---|
| Price | $9.99 | $8.99 — better |
| Rating | — | 4.5 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 9 months | Every 7 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free with in-app purchases |
| Best chart rank | — | #194 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 12.2 |
| Further details — not scored | ||
| Size | 275 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Learning Fundamentals, Inc. | Janine Toole |
In-app purchases
Articulation IV
No in-app purchases
Inference Ace
No in-app purchases
Questions
Is Articulation IV free?
Is Inference Ace free?
Do Articulation IV or Inference Ace have ads?
Which is updated more often, Articulation IV or Inference Ace?
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