# Inference Ace vs WJ IV Scoring & Reporting

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.

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

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.

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

## The numbers

| Metric | Inference Ace | WJ IV Scoring & Reporting |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (22 ratings)](https://appshunter.io/ios/app/inference-ace/id866920724/reviews)** | [1.9 (16 ratings)](https://appshunter.io/ios/app/wj-iv-scoring-and-reporting/id1024909280/reviews) |
| Number of ratings | **22** | 16 |
| Positive reviews | **88.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 17 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 56 MB |
| Requires iOS | 12.2 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Houghton Mifflin Harcourt](https://appshunter.io/developer/409368007) |

## What reviewers say

### Inference Ace

[App page](https://appshunter.io/ios/app/inference-ace/id866920724)

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:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to 2 Players | $1.99 | one-time |
| Inference Ace: Buy All Levels | $2.99 | one-time |
| Upgrade to 10 Players | $2.99 | one-time |


### WJ IV Scoring & Reporting

[App page](https://appshunter.io/ios/app/wj-iv-scoring-and-reporting/id1024909280)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*