# SeeLeveL Sync vs Mariner Check

The clearest difference is rating: Mariner Check at 5.0 against SeeLeveL Sync's 2.4. SeeLeveL Sync's advantage is ratings volume (5 vs 1) and iOS requirement (13.4 vs 26.5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Mariner Check holds the better App Store score, 5.0 against 2.4. That said, the two scores are not equally well evidenced: SeeLeveL Sync has 5 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | SeeLeveL Sync | Mariner Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (5 ratings)](https://appshunter.io/ios/app/seelevel-sync/id6451456679/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mariner-check/id6801565663/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | Free |
| Size | 25 MB | 4 MB |
| Requires iOS | **13.4** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Garnet Instruments Ltd.](https://appshunter.io/developer/1148117796) | [KEVIN M GRAVES](https://appshunter.io/developer/1875176384) |

## What reviewers say

### SeeLeveL Sync

[App page](https://appshunter.io/ios/app/seelevel-sync/id6451456679)

Monitor your RV's fresh water, grey water, black water, and LPG tank levels in real-time. Customize tank names, colors, and set alarms for low or high levels. Connects via Bluetooth to compatible SeeLeveL II tank monitors.

**Highlights:** Real-time tank level monitoring, Customizable tank names and colors, Low and high level tank alarms, Bluetooth connectivity, Graphical and percentage display, Home Screen widget support

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

**In-app purchases:** none


### Mariner Check

[App page](https://appshunter.io/ios/app/mariner-check/id6801565663)

Organize professional mariner credentials and track renewal dates. View status at a glance, set custom reminders, and manage multiple document types. Stay prepared for renewals with this convenient organizational tool.

**Highlights:** Organize credentials, Track renewal dates, Custom renewal windows, Expiration reminders, Home Screen widget, Offline access, Mask credential numbers

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

**In-app purchases:** none


## Frequently asked questions

### Is SeeLeveL Sync free?

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

### Is Mariner Check free?

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

### Which has better reviews, SeeLeveL Sync or Mariner Check?

Mariner Check is rated higher. SeeLeveL Sync averages 2.4 out of 5 from 5 ratings, while Mariner Check averages 5.0 from 1 ratings.

### Do SeeLeveL Sync or Mariner Check have ads?

Neither SeeLeveL Sync nor Mariner Check shows ads.

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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.*