# J vs Mariners Log

The clearest difference is update cadence: J at fortnightly against Mariners Log's every 4 months. Mariners Log's advantage is iOS requirement (11.0 vs 13.0). 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.

J ships an update fortnightly, Mariners Log every 4 months. The most recent releases landed on June 1, 2026 and May 15, 2026 respectively.

## The numbers

| Metric | J | Mariners Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/j-tech-digital-control/id1572720298/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free | — |
| Size | 59 MB | 57 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [J-Tech Digital, Inc](https://appshunter.io/developer/1147761166) | [Kengineer Limited](https://appshunter.io/developer/1619488060) |

## What reviewers say

### 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


### Mariners Log

[App page](https://appshunter.io/ios/app/mariners-log/id1619488058)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is Mariners Log free?

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

### Do J or Mariners Log have ads?

Neither J nor Mariners Log shows ads.

### Which is updated more often, J or Mariners Log?

J ships an update fortnightly, and Mariners Log every 4 months. Most recently, J was updated on June 1, 2026 and Mariners Log on May 15, 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.*