# Kalley's Machine Plus Cats vs Integrals trainer

The clearest difference is monetization model: Integrals trainer at free against Kalley's Machine Plus Cats's paid. Integrals trainer also leads on iOS requirement (7.0 vs 11.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.7 for Kalley's Machine Plus Cats against 4.6 for Integrals trainer. Both are backed by a comparable volume of ratings — 38 and 14 respectively. Written reviews are what separate them: 93% of Kalley's Machine Plus Cats's written reviews are positive against 100% of Integrals trainer's.

Kalley's Machine Plus Cats ships an update every 5 weeks, Integrals trainer monthly. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Kalley's Machine Plus Cats | Integrals trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (38 ratings)](https://appshunter.io/ios/app/kalleys-machine-plus-cats/id905722643/reviews)** | [4.6 (14 ratings)](https://appshunter.io/ios/app/integrals-trainer/id1100411214/reviews) |
| Number of ratings | **38** | 14 |
| Positive reviews | 92.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 35 MB | 14 MB |
| Requires iOS | 11.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RocketWagon, LLC](https://appshunter.io/developer/905722646) | [Jonathan Ruel](https://appshunter.io/developer/1091592842) |

## What reviewers say

### Kalley's Machine Plus Cats

[App page](https://appshunter.io/ios/app/kalleys-machine-plus-cats/id905722643)

An interactive storybook where a child's imaginative drawing of a machine comes to life. Explore playful interactions, help the machine perform various actions, and engage with whimsical cats. Features include read-to-me and touch-to-read options for young readers.

**Highlights:** Interactive machine play, Smash, inflate, shrink, and mold objects, Interact with cats, Read-to-me narration, Touch-to-read word highlighting, Child-friendly controls

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Highly engaging and fun
- 🎨 Creative and imaginative
- 📚 Great for reading skills
- 👨‍👩‍👧‍👦 Family-friendly entertainment
- 💡 Educational value (science, cause/effect)

**What reviewers complain about**

- 👎 Limited content/replayability
- 🤏 Frustrating swipe gestures
- 💰 Perceived as not worth the price

**Reported bugs**

- Cannot get past the first page
- No sound at all
- Navigation issues on older devices

**Requested features**

- Disable swipe feature
- More interactive elements on the last page
- More content/sequels/series
- More interaction with cats
- More interactive elements in general


### Integrals trainer

[App page](https://appshunter.io/ios/app/integrals-trainer/id1100411214)

Master the art of choosing the right technique for solving integrals. Practice identifying methods and get step-by-step guidance to improve your skills and save time on complex problems.

**Highlights:** Integral method selection practice, Step-by-step solution guidance, Covers various integral techniques, Focuses on the initial problem-solving step, Improves speed and accuracy

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

**In-app purchases:** none


## Frequently asked questions

### Is Kalley's Machine Plus Cats free?

Kalley's Machine Plus Cats is free to download, with no in-app purchases.

### Is Integrals trainer free?

Integrals trainer is free to download, with no in-app purchases.

### Which has better reviews, Kalley's Machine Plus Cats or Integrals trainer?

Kalley's Machine Plus Cats is rated higher. Kalley's Machine Plus Cats averages 4.7 out of 5 from 38 ratings, while Integrals trainer averages 4.6 from 14 ratings.

### Do Kalley's Machine Plus Cats or Integrals trainer have ads?

Neither Kalley's Machine Plus Cats nor Integrals trainer shows ads.

### Which is updated more often, Kalley's Machine Plus Cats or Integrals trainer?

Kalley's Machine Plus Cats ships an update every 5 weeks, and Integrals trainer monthly. Most recently, Kalley's Machine Plus Cats was updated on November 1, 2026 and Integrals trainer 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.*