Comparison

Inference Ace vs WJ IV Scoring & Reporting

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

Head to head
About

Inference Ace

This app helps children in grades 2-5 improve their reading comprehension by teaching inference skills step-by-step. It uses a game-like environment with over 450 examples and a reward center to keep kids engaged. Detailed reporting is available for up to 10 students.

Highlights
  • Step-by-step inference skill building
  • Game-like environment with reward center
  • Over 450 examples designed by teachers
  • Detailed reporting for multiple students
  • Incremental learning with unlocked levels
  • Guided learning for reduced frustration
Features
Read full description

** 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 in a fun, game-like environment. ***** 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! The free version of this app has 4 free levels for a single player. Remaining levels are unlocked by a single in-app purchase. Additional players can be purchased separately through an in-app purchase. Check out 'Inference Ace School Edition' if you prefer no 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 :-)

About

WJ IV Scoring & Reporting

This app allows registered users of a web-based assessment platform to manage testing tasks on mobile devices. It enables score entry for specific tests and generates score reports. Data can be synced back to the main online platform.

Highlights
  • Create examinees and enter scores
  • Run score reports
  • Sync data to online platform
  • Manage assessment tasks on mobile
  • Inactivity timeout warnings
  • Score entry for Qualitative Observations
Features
Read full description

Woodcock-Johnson® IV has gone mobile! With the Woodcock-Johnson IV Mobile App, registered users of WJ IV Online Scoring and Reporting can manage assessment tasks wherever an internet connection is available. Use the WJ IV Mobile App to: · Create examinees and enter scores for WJ IV and WMLS® -R NU test records · Run the Score Report · Sync data to the main WJ IV Online Scoring and Reporting site WJIV Mobile Scoring and Reporting 1.2 is now live! NEW! Features Include: · New! inactivity timeout warnings have been implemented for ease of use. · New! enhancements made to the WJIV Tests of Achievement and Extended Sentence Reading Fluency to allow entering of scores on Qualitative Observations.

Screenshots

Inference Ace4 screens
WJ IV Scoring & Reporting4 screens

Verdict

The call

The clearest difference is review sentiment: Inference Ace at 89% against WJ IV Scoring & Reporting's 0%. Inference Ace also leads on rating (3.5 vs 1.9) and update cadence (every 7 months vs every 17 months). WJ IV Scoring & Reporting's advantage is in-app purchases (none vs 3) and iOS requirement (7.0 vs 12.2). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Inference Ace sells 3 one-off in-app purchases. WJ IV Scoring & Reporting asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Inference Ace holds the better App Store score, 3.5 against 1.9. Both are backed by a comparable volume of ratings — 22 and 16 respectively. Written reviews point the same way: 89% of Inference Ace's written reviews are positive against 0% of WJ IV Scoring & Reporting's.

UpkeepUpdate frequency

Inference Ace ships an update every 7 months, WJ IV Scoring & Reporting every 17 months. Both last shipped on November 6, 2026.

Scorecard6 real differences · 4 level
Inference Ace versus WJ IV Scoring & Reporting: the parameters behind the verdict, then further details
ParameterInference AceWJ IV Scoring & Reporting
PriceFreeFree
Rating3.5 (22 ratings) — better1.9 (16 ratings)
Positive reviews88.6% of reviews — better0.0% of reviews
Number of ratings22 — better16
Update frequencyEvery 7 months — betterEvery 17 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.27.0 — better
Further details — not scored
Size22 MB56 MB
Age rating4+4+
DeveloperJanine TooleHoughton Mifflin Harcourt

Customer experience

Inference Ace

All ratings21 ratings
Positive66.7%
Neutral4.8%
Negative28.6%
Written reviews35 reviews
Positive88.6%
Neutral5.7%
Negative5.7%

WJ IV Scoring & Reporting

All ratings16 ratings
Positive12.5%
Neutral18.8%
Negative68.8%
Written reviews11 reviews
Positive0.0%
Neutral18.2%
Negative81.8%

In-app purchases

3 purchases

Inference Ace

One-time3
  • Upgrade to 2 Players$1.99
  • Inference Ace: Buy All Levels$2.99
  • Upgrade to 10 Players$2.99
None

WJ IV Scoring & Reporting

No in-app purchases

Questions

Is Inference Ace free?
Inference Ace is free to download, with in-app purchases available.
Is WJ IV Scoring & Reporting free?
WJ IV Scoring & Reporting is free to download, with no in-app purchases.
Which has better reviews, Inference Ace or WJ IV Scoring & Reporting?
Inference Ace is rated higher. Inference Ace averages 3.5 out of 5 from 22 ratings, while WJ IV Scoring & Reporting averages 1.9 from 16 ratings.
Do Inference Ace or WJ IV Scoring & Reporting have ads?
Neither Inference Ace nor WJ IV Scoring & Reporting shows ads.
Which is updated more often, Inference Ace or WJ IV Scoring & Reporting?
Inference Ace ships an update every 7 months, and WJ IV Scoring & Reporting every 17 months. Most recently, Inference Ace was updated on November 6, 2026 and WJ IV Scoring & Reporting on November 6, 2026.

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