# GDMS vs J

The clearest difference is rating: GDMS at 4.7 against J's 2.6. J's advantage is update cadence (fortnightly vs every 3 months). On price, review sentiment, ratings volume and ads there is nothing between them.

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

GDMS holds the better App Store score, 4.7 against 2.6. Both are backed by a comparable volume of ratings — 7 and 5 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

GDMS ships an update every 3 months, J fortnightly. The most recent releases landed on October 2, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | GDMS | J |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7 ratings)](https://appshunter.io/ios/app/gdms/id1501322947/reviews)** | [2.6 (5 ratings)](https://appshunter.io/ios/app/j-tech-digital-control/id1572720298/reviews) |
| Number of ratings | **7** | 5 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 15 MB | 59 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grandstream](https://appshunter.io/developer/951547763) | [J-Tech Digital, Inc](https://appshunter.io/developer/1147761166) |

## What reviewers say

### GDMS

[App page](https://appshunter.io/ios/app/gdms/id1501322947)

This app offers centralized, secure management for Grandstream audio/video products. Administrators can easily add devices by scanning codes, configure accounts, upgrade firmware, and receive real-time alerts about device status.

**Highlights:** Scan code to add devices, Configure accounts, Upgrade device firmware, Remote device start, Real-time device monitoring, Push alert messages

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

**In-app purchases:** none


### J

[App page](https://appshunter.io/ios/app/j-tech-digital-control/id1572720298)

Easily manage and configure compatible J-Tech Digital A/V equipment directly from your mobile device. Control routing settings, save configurations, and connect devices without needing a physical keyboard or mouse.

**Highlights:** Control routing settings, Manage multiple devices, Remember device settings, Save/Load routing settings, Configure A/V equipment, Connect devices remotely

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GDMS free?

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

### Is J free?

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

### Which has better reviews, GDMS or J?

GDMS is rated higher. GDMS averages 4.7 out of 5 from 7 ratings, while J averages 2.6 from 5 ratings.

### Do GDMS or J have ads?

Neither GDMS nor J shows ads.

### Which is updated more often, GDMS or J?

GDMS ships an update every 3 months, and J fortnightly. Most recently, GDMS was updated on October 2, 2026 and J on September 26, 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.*