# Mechanical Engineer vs Autotal

The clearest difference is in-app purchases: Autotal at none against Mechanical Engineer's 3. Autotal also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (11.0 vs 17.6). Mechanical Engineer's advantage is ads (none vs shown). On price 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. Autotal asks for nothing beyond the download.

Mechanical Engineer ships an update every 2 months, Autotal every 3 weeks. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Mechanical Engineer | Autotal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (8 ratings)](https://appshunter.io/ios/app/mechanical-engineer/id327055140/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 29.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 19 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [AMADEO VAZQUEZ](https://appshunter.io/developer/1654997170) |

## 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 |


### Autotal

[App page](https://appshunter.io/ios/app/autotal/id6444500151)

**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 Autotal free?

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

### Do Mechanical Engineer or Autotal have ads?

Autotal shows ads; Mechanical Engineer does not.

### Which is updated more often, Mechanical Engineer or Autotal?

Mechanical Engineer ships an update every 2 months, and Autotal every 3 weeks. Most recently, Mechanical Engineer was updated on October 6, 2026 and Autotal 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.*