# Inference Ace vs Sort By Kind

The clearest difference is rating: Sort By Kind at 4.4 against Inference Ace's 3.5. Sort By Kind also leads on in-app purchases (none vs 3) and update cadence (every 2 months vs every 7 months). Inference Ace's advantage is review sentiment (89% vs 75%) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Inference Ace sells 3 one-off in-app purchases. Sort By Kind asks for nothing beyond the download.

Sort By Kind holds the better App Store score, 4.4 against 3.5. Both are backed by a comparable volume of ratings — 22 and 7 respectively. Written reviews complicate that: 89% of Inference Ace's written reviews are positive against 75% of Sort By Kind's, so the app with the better star average is not the one people write more warmly about.

Inference Ace ships an update every 7 months, Sort By Kind every 2 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Inference Ace | Sort By Kind |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (22 ratings)](https://appshunter.io/ios/app/inference-ace/id866920724/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/sort-by-kind-sort-visually-related-items/id1135864577/reviews)** |
| Number of ratings | **22** | 7 |
| Positive reviews | **88.6% of reviews** | 75.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 77 MB |
| Requires iOS | 12.2 | **7.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [STEP BY STEP](https://appshunter.io/developer/961412234) |

## 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 |


### Sort By Kind

[App page](https://appshunter.io/ios/app/sort-by-kind-sort-visually-related-items/id1135864577)

This educational app helps children aged 2 and up develop visual perception, cognitive, and language skills through fun sorting activities. It offers a simple, distraction-free learning environment designed to enhance critical thinking and problem-solving abilities.

**Highlights:** Visual item sorting activities, Develops visual perception, Enhances cognitive skills, Improves language skills, Progress tracking for educators, Accessibility features for users with disabilities

**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 Sort By Kind free?

Sort By Kind is free to download, with no in-app purchases.

### Which has better reviews, Inference Ace or Sort By Kind?

Sort By Kind is rated higher. Inference Ace averages 3.5 out of 5 from 22 ratings, while Sort By Kind averages 4.4 from 7 ratings.

### Do Inference Ace or Sort By Kind have ads?

Neither Inference Ace nor Sort By Kind shows ads.

### Which is updated more often, Inference Ace or Sort By Kind?

Inference Ace ships an update every 7 months, and Sort By Kind every 2 months. Most recently, Inference Ace was updated on November 6, 2026 and Sort By Kind on November 2, 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.*