# MOSDAC vs DUO LINK 4

The clearest difference is rating: MOSDAC at 5.0 against DUO LINK 4's 2.1. DUO LINK 4's advantage is ads (none vs shown) and update cadence (every 2 months vs every 24 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

MOSDAC holds the better App Store score, 5.0 against 2.1. That said, the two scores are not equally well evidenced: DUO LINK 4 has 498 ratings behind it against 4, so its average is the more settled of the two.

MOSDAC ships an update every 24 months, DUO LINK 4 every 2 months. The most recent releases landed on September 18, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | MOSDAC | DUO LINK 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/mosdac-app/id1061727949/reviews)** | [2.1 (498 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews) |
| Number of ratings | 4 | **498** |
| Positive reviews | — | 19.8% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 24 months | **Every 2 months** |
| Monetization | Ad-supported | **Free** |
| Size | 30 MB | 123 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Allegheny East Conference of Seventh-Day Adventists](https://appshunter.io/developer/1550972799) | [PNY](https://appshunter.io/developer/1103672386) |

## What reviewers say

### MOSDAC

[App page](https://appshunter.io/ios/app/mosdac-app/id1061727949)

This app helps users stay spiritually connected by providing daily Bible texts, a prayer wall, and information on church events. It aims to make spiritual study accessible for busy individuals on the go.

**Highlights:** Daily Bible text, Prayer wall, Upcoming events and gatherings, Spiritual satisfaction on the go

**In-app purchases:** none


### DUO LINK 4

[App page](https://appshunter.io/ios/app/duo-link-4/id1103672387)

Manage and transfer files between your iOS device and a USB flash drive. Free up storage, back up data, and even charge your device. Supports a wide range of file formats for seamless integration.

**Highlights:** Free up iPhone/iPad space, Charge iOS devices, Back up contacts, Transfer photos and videos, Store photos directly, Manage files, Music and video playback

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient file transfer
- 💡 Useful for freeing up phone storage
- 👍 Straightforward to use

**What reviewers complain about**

- 🐛 Frequent app crashes
- 🔍 Confusing or limited UI
- 🔌 Compatibility issues with newer devices
- 💾 Data loss or corruption

**Reported bugs**

- App fails to detect connected device
- Transferred files not visible or accessible
- Inconsistent behavior when renaming folders

**Requested features**

- Add 'select all' option for photos/files
- Support for more file formats
- Improve iPad app experience
- Integrate with native Files app


## Frequently asked questions

### Is MOSDAC free?

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

### Is DUO LINK 4 free?

DUO LINK 4 is free to download, with no in-app purchases.

### Which has better reviews, MOSDAC or DUO LINK 4?

MOSDAC is rated higher. MOSDAC averages 5.0 out of 5 from 4 ratings, while DUO LINK 4 averages 2.1 from 498 ratings.

### Do MOSDAC or DUO LINK 4 have ads?

MOSDAC shows ads; DUO LINK 4 does not.

### Which is updated more often, MOSDAC or DUO LINK 4?

MOSDAC ships an update every 24 months, and DUO LINK 4 every 2 months. Most recently, MOSDAC was updated on September 18, 2026 and DUO LINK 4 on October 13, 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.*