# Engineering Calculator vs ChatFile

The clearest difference is rating: ChatFile at 5.0 against Engineering Calculator's 4.5. ChatFile also leads on ads (none vs shown). Engineering Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (12.2 vs 16.0). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. ChatFile sells 2 in-app purchases, starting at $7.99 per month. Engineering Calculator asks for nothing beyond the download.

ChatFile holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on September 23, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Engineering Calculator | ChatFile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/engineering-calculator/id1395510375/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chatfile/id6467875546/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | **Ad-supported** | Freemium |
| Size | 1 MB | 38 MB |
| Requires iOS | **12.2** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Masato Kanazawa](https://appshunter.io/developer/1110570349) | [飞 杨](https://appshunter.io/developer/1493121831) |

## What reviewers say

### Engineering Calculator

[App page](https://appshunter.io/ios/app/engineering-calculator/id1395510375)

This utility app helps users convert units and calculate tips, primarily for those in the US. It operates offline and aims for minimal user interaction to provide quick results. Useful for avoiding misunderstandings in business dealings due to unit differences.

**Highlights:** Unit conversion, Tip calculation, Offline functionality, Minimalist interface, Business negotiation aid

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

**In-app purchases:** none


### ChatFile

[App page](https://appshunter.io/ios/app/chatfile/id6467875546)

Engage in natural conversations with your documents using advanced AI. Supports a wide range of file types, including PDFs, Word, PPT, and e-books, for enhanced productivity and learning.

**Highlights:** AI-powered document interaction, Supports PDF, Word, PPT, CSV, XML, EPUB, Natural language processing, Seamless data synchronization, Intuitive native app experience

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $7.99 | per month |
| Premium | $49.99 | per year |


## Frequently asked questions

### Is Engineering Calculator free?

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

### Is ChatFile free?

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

### Which has better reviews, Engineering Calculator or ChatFile?

ChatFile is rated higher. Engineering Calculator averages 4.5 out of 5 from 2 ratings, while ChatFile averages 5.0 from 1 ratings.

### Do Engineering Calculator or ChatFile have ads?

Engineering Calculator shows ads; ChatFile does not.

### Which is updated more often, Engineering Calculator or ChatFile?

Engineering Calculator ships an update monthly, and ChatFile monthly. Most recently, Engineering Calculator was updated on September 23, 2026 and ChatFile on September 30, 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.*