# Inference Ace vs 英英マスター｜英語を英語で学ぶ

The clearest difference is update cadence: 英英マスター｜英語を英語で学ぶ at every 2 weeks against Inference Ace's every 7 months. Inference Ace's advantage is iOS requirement (12.2 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Inference Ace sells 3 one-off in-app purchases and 英英マスター｜英語を英語で学ぶ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Inference Ace ships an update every 7 months, 英英マスター｜英語を英語で学ぶ every 2 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Inference Ace | 英英マスター｜英語を英語で学ぶ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (22 ratings)](https://appshunter.io/ios/app/inference-ace/id866920724/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 88.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 8 MB |
| Requires iOS | **12.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Janine Toole](https://appshunter.io/developer/839832427) | [Yoshitaka Tanaka](https://appshunter.io/developer/1510093015) |

## 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 |


### 英英マスター｜英語を英語で学ぶ

[App page](https://appshunter.io/ios/app/id6792595719)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全てのレッスンにすぐに挑戦 | $8.99 | one-time |


## Frequently asked questions

### Is Inference Ace free?

Inference Ace is free to download, with in-app purchases available.

### Is 英英マスター｜英語を英語で学ぶ free?

英英マスター｜英語を英語で学ぶ is free to download, with in-app purchases available.

### Do Inference Ace or 英英マスター｜英語を英語で学ぶ have ads?

Neither Inference Ace nor 英英マスター｜英語を英語で学ぶ shows ads.

### Which is updated more often, Inference Ace or 英英マスター｜英語を英語で学ぶ?

Inference Ace ships an update every 7 months, and 英英マスター｜英語を英語で学ぶ every 2 weeks. Most recently, Inference Ace was updated on November 6, 2026 and 英英マスター｜英語を英語で学ぶ on October 31, 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.*