# Aviation Dictionary Offline vs Concord Reader +

The clearest difference is update cadence: Concord Reader + at every 3 months against Aviation Dictionary Offline's every 31 months. Concord Reader + also leads on iOS requirement (11.0 vs 14.0). 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, Concord Reader + every 3 months. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Aviation Dictionary Offline | Concord Reader + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.8 (21 ratings)](https://appshunter.io/ios/app/concord-reader-plus/id1562115672/reviews)** |
| Number of ratings | — | **21** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 63 MB | 101 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Putranto](https://appshunter.io/developer/1097285857) | [Concord Music Group, Incorporated](https://appshunter.io/developer/807616502) |

## What reviewers say

### Aviation Dictionary Offline

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

**In-app purchases:** none


### Concord Reader +

[App page](https://appshunter.io/ios/app/concord-reader-plus/id1562115672)

Access a vast digital library of theatrical scripts and sheet music. Enhance your reading experience with interactive notes and highlighting. Seamlessly sync your progress and notes across all your devices.

**Highlights:** Access over 2,000 plays and musicals, Interactive notes and highlighting, Cross-device syncing, Group access for classrooms/rehearsals, Digital sheet music

**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 Concord Reader + free?

Concord Reader + is free to download, with no in-app purchases.

### Do Aviation Dictionary Offline or Concord Reader + have ads?

Neither Aviation Dictionary Offline nor Concord Reader + shows ads.

### Which is updated more often, Aviation Dictionary Offline or Concord Reader +?

Aviation Dictionary Offline ships an update every 31 months, and Concord Reader + every 3 months. Most recently, Aviation Dictionary Offline was updated on October 19, 2026 and Concord Reader + on October 7, 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.*