# Time Calc. Pro vs Aviation Dictionary

The clearest difference is price: Aviation Dictionary at Free against Time Calc. Pro's $0.99. Aviation Dictionary also leads on update cadence (every 4 months vs every 28 months). Time Calc. Pro's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support there is nothing between them.

Aviation Dictionary is free to download; Time Calc. Pro costs $0.99 up front. Aviation Dictionary sells 3 in-app purchases, starting at $0.99 per 7 days. Time Calc. Pro asks for nothing beyond the download.

Time Calc. Pro ships an update every 28 months, Aviation Dictionary every 4 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Time Calc. Pro | Aviation Dictionary |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.3 (18 ratings)](https://appshunter.io/ios/app/aviation-dictionary/id1525345620/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 4 months** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 32 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Nishijima](https://appshunter.io/developer/1389796249) | [Evans Mauta](https://appshunter.io/developer/1498111447) |

## What reviewers say

### Time Calc. Pro

[App page](https://appshunter.io/ios/app/time-calc-pro/id1509605480)

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

**In-app purchases:** none


### Aviation Dictionary

[App page](https://appshunter.io/ios/app/aviation-dictionary/id1525345620)

This app provides a comprehensive offline dictionary and reference for aviation terminology, including over 6000 words and abbreviations. It's designed for pilots, technicians, and aviation specialists to quickly access definitions, phonetic alphabets, Q-codes, and more. Features include search, bookmarking, and text-to-speech pronunciation.

**Highlights:** Offline access, 6000+ aviation words & abbreviations, Search functionality, Bookmarking, Text-to-speech pronunciation, Phonetic alphabet & Q-codes, Airline & airport information

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AvDic Pro - 1 Week | $0.99 | per 7 days |
| AvDic Pro - 1 Month | $2.99 | per month |
| AvDic Pro - 1 Year | $19.99 | per year |


## Frequently asked questions

### Is Time Calc. Pro free?

Time Calc. Pro costs $0.99, with no in-app purchases.

### Is Aviation Dictionary free?

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

### Do Time Calc. Pro or Aviation Dictionary have ads?

Aviation Dictionary shows ads; Time Calc. Pro does not.

### Which is updated more often, Time Calc. Pro or Aviation Dictionary?

Time Calc. Pro ships an update every 28 months, and Aviation Dictionary every 4 months. Most recently, Time Calc. Pro was updated on October 8, 2026 and Aviation Dictionary on October 5, 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.*