# Aviation Dictionary Offline vs ASA Library

The clearest difference is update cadence: ASA Library at every 12 months against Aviation Dictionary Offline's every 31 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Aviation Dictionary Offline ships an update every 31 months, ASA Library every 12 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Aviation Dictionary Offline | ASA Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.7 (47 ratings)](https://appshunter.io/ios/app/asa-library/id6449281063/reviews)** |
| Number of ratings | — | **47** |
| Positive reviews | — | 10.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 12 months** |
| Monetization | — | Free |
| Size | 63 MB | 74 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Putranto](https://appshunter.io/developer/1097285857) | [ASA](https://appshunter.io/developer/334278379) |

## What reviewers say

### Aviation Dictionary Offline

[App page](https://appshunter.io/ios/app/aviation-dictionary-offline/id1523244920)

**In-app purchases:** none


### ASA Library

[App page](https://appshunter.io/ios/app/asa-library/id6449281063)

Access and read your purchased eBooks from asa2fly.com on any device. Download titles for offline reading and utilize features like highlighting, bookmarking, and note-taking. An interactive table of contents and easy-to-read rendering enhance the reading experience.

**Highlights:** Offline eBook access, Highlighting, Bookmarking, Note-taking, Search functionality, Interactive table of contents

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

**In-app purchases:** none


## Frequently asked questions

### Is Aviation Dictionary Offline free?

Aviation Dictionary Offline is free to download, with no in-app purchases.

### Is ASA Library free?

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

### Do Aviation Dictionary Offline or ASA Library have ads?

Neither Aviation Dictionary Offline nor ASA Library shows ads.

### Which is updated more often, Aviation Dictionary Offline or ASA Library?

Aviation Dictionary Offline ships an update every 31 months, and ASA Library every 12 months. Most recently, Aviation Dictionary Offline was updated on November 7, 2026 and ASA Library on November 3, 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.*