# Mechanical Engineer vs Sealing Materials Selector

The clearest difference is rating: Sealing Materials Selector at 5.0 against Mechanical Engineer's 4.4. Sealing Materials Selector also leads on in-app purchases (none vs 3) and iOS requirement (15.6 vs 17.6). Mechanical Engineer's advantage is update cadence (every 2 months vs every 11 months) and ratings volume (8 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. Mechanical Engineer sells 3 in-app purchases, starting at $0.99 per month. Sealing Materials Selector asks for nothing beyond the download.

Sealing Materials Selector holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 8 and 2 respectively.

Mechanical Engineer ships an update every 2 months, Sealing Materials Selector every 11 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Mechanical Engineer | Sealing Materials Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (8 ratings)](https://appshunter.io/ios/app/mechanical-engineer/id327055140/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sealing-materials-selector/id1128647369/reviews)** |
| Number of ratings | **8** | 2 |
| Positive reviews | 29.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 15 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) |

## What reviewers say

### Mechanical Engineer

[App page](https://appshunter.io/ios/app/mechanical-engineer/id327055140)

This app provides over 300 essential mechanical engineering formulas across various domains. It allows users to calculate, save, compare, and share results, aiding in project optimization and decision-making. Users can access a limited number of calculations for free, with a subscription unlocking full functionality.

**Highlights:** Over 300 mechanical engineering formulas, Covers diverse engineering domains, Save and compare formula results, Share calculation outcomes, Intuitive and practical interface, Regular updates based on user input

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Pro Quarterly | $0.99 | per 3 months |
| Pro Yearly | $2.99 | per year |


### Sealing Materials Selector

[App page](https://appshunter.io/ios/app/sealing-materials-selector/id1128647369)

Easily find the right sealing materials by entering specifications like temperature and hardness. Filter by chemical compatibility, approvals, or product type for O-Rings, Quad-Rings, and V-Rings. Request material datasheets directly through the app.

**Highlights:** Search by material specifications, Filter by temperature and hardness, Chemical compatibility filtering, Institute approvals filtering, Product type filtering (O-Rings, Quad-Rings, V-Rings), Request material datasheets

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Engineer free?

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

### Is Sealing Materials Selector free?

Sealing Materials Selector is free to download, with no in-app purchases.

### Which has better reviews, Mechanical Engineer or Sealing Materials Selector?

Sealing Materials Selector is rated higher. Mechanical Engineer averages 4.4 out of 5 from 8 ratings, while Sealing Materials Selector averages 5.0 from 2 ratings.

### Do Mechanical Engineer or Sealing Materials Selector have ads?

Neither Mechanical Engineer nor Sealing Materials Selector shows ads.

### Which is updated more often, Mechanical Engineer or Sealing Materials Selector?

Mechanical Engineer ships an update every 2 months, and Sealing Materials Selector every 11 months. Most recently, Mechanical Engineer was updated on October 6, 2026 and Sealing Materials Selector on October 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*