# Mechanical Dictionary vs BBBC Gray

The clearest difference is in-app purchases: BBBC Gray at none against Mechanical Dictionary's 5. BBBC Gray also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Mechanical Dictionary sells 5 in-app purchases, starting at $1.99 per 7 days. BBBC Gray asks for nothing beyond the download.

Mechanical Dictionary ships an update every 9 months, BBBC Gray every 6 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Mechanical Dictionary | BBBC Gray |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (5 ratings)](https://appshunter.io/ios/app/mechanical-dictionary-offline/id1480363529/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 55 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Puju Dekivadiya](https://appshunter.io/developer/1289574712) | [Bible Believing Baptist Church](https://appshunter.io/developer/1834618994) |

## What reviewers say

### Mechanical Dictionary

[App page](https://appshunter.io/ios/app/mechanical-dictionary-offline/id1480363529)

This app provides a comprehensive offline dictionary for mechanical engineering terms. It includes video lessons, tests, and expert coaching to enhance knowledge in the field. Features like search, audio pronunciation, and daily word learning are available.

**Highlights:** Offline access to thousands of terms, Search and bookmark functionality, Audio pronunciation of words, Daily 'Word of the Day' feature, Multiple choice quizzes, Customizable color themes

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $1.99 | per 7 days |
| Monthly Pro Plan | $4.99 | per month |
| Yearly Pro Plan | $29.99 | per year |
| Remove Ads | $9.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### BBBC Gray

[App page](https://appshunter.io/ios/app/bbbc-gray/id6751321724)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Dictionary free?

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

### Is BBBC Gray free?

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

### Do Mechanical Dictionary or BBBC Gray have ads?

Mechanical Dictionary shows ads; BBBC Gray does not.

### Which is updated more often, Mechanical Dictionary or BBBC Gray?

Mechanical Dictionary ships an update every 9 months, and BBBC Gray every 6 months. Most recently, Mechanical Dictionary was updated on October 24, 2026 and BBBC Gray on October 28, 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.*