# Kidioms 3 vs Inference Ace

The clearest difference is price: Kidioms 3 at $1.99 against Inference Ace's $8.99. Inference Ace's advantage is update cadence (every 7 months vs every 24 months) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Kidioms 3 costs $1.99 and Inference Ace $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kidioms 3 ships an update every 24 months, Inference Ace every 7 months. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Kidioms 3 | Inference Ace |
| --- | --- | --- |
| Price | **$1.99** | $8.99 |
| Rating | — | **[4.5 (4 ratings)](https://appshunter.io/ios/app/inference-ace/id875998338/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | — | Free with in-app purchases |
| Size | 54 MB | 22 MB |
| Requires iOS | 13.2 | **12.2** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ventura Educational Systems](https://appshunter.io/developer/371324172) | [Janine Toole](https://appshunter.io/developer/839832427) |

## What reviewers say

### Kidioms 3

[App page](https://appshunter.io/ios/app/kidioms-3/id574289929)

**Features:** macOS Compatibility

**In-app purchases:** none


### Inference Ace

[App page](https://appshunter.io/ios/app/inference-ace/id875998338)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kidioms 3 free?

Kidioms 3 costs $1.99, with no in-app purchases.

### Is Inference Ace free?

Inference Ace costs $8.99, with no in-app purchases.

### Do Kidioms 3 or Inference Ace have ads?

Neither Kidioms 3 nor Inference Ace shows ads.

### Which is updated more often, Kidioms 3 or Inference Ace?

Kidioms 3 ships an update every 24 months, and Inference Ace every 7 months. Most recently, Kidioms 3 was updated on October 17, 2026 and Inference Ace on October 14, 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.*