# ES Review vs Mechanical Components

The clearest difference is in-app purchases: ES Review at none against Mechanical Components's 4. ES Review also leads on update cadence (monthly vs every 7 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Mechanical Components sells 4 in-app purchases, starting at $7.99 per 7 days. ES Review asks for nothing beyond the download.

ES Review ships an update monthly, Mechanical Components every 7 months. The most recent releases landed on September 11, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | ES Review | Mechanical Components |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-components/id6738186476/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 49 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Makarius Smart Innovations Inc.](https://appshunter.io/developer/1546085730) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### ES Review

[App page](https://appshunter.io/ios/app/es-review/id6448111480)

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

**In-app purchases:** none


### Mechanical Components

[App page](https://appshunter.io/ios/app/mechanical-components/id6738186476)

Test your knowledge of mechanical components with interactive quizzes. Features high-quality images, instant feedback, and multiple difficulty levels to help you master engineering parts. Ideal for students, DIY enthusiasts, and professionals.

**Highlights:** Interactive quizzes on mechanical parts, High-quality component images, Instant feedback and facts, Multiple difficulty levels, Learn and master engineering components

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week | $7.99 | per 7 days |
| Month | $19.99 | per month |
| 6 months | $19.99 | per 6 months |
| Year | $29.99 | per year |


## Frequently asked questions

### Is ES Review free?

ES Review is free to download, with no in-app purchases.

### Is Mechanical Components free?

Mechanical Components is free to download, with in-app purchases available.

### Do ES Review or Mechanical Components have ads?

Neither ES Review nor Mechanical Components shows ads.

### Which is updated more often, ES Review or Mechanical Components?

ES Review ships an update monthly, and Mechanical Components every 7 months. Most recently, ES Review was updated on September 11, 2026 and Mechanical Components on June 8, 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.*