# AnchorChainCalculator vs Gobius

The clearest difference is review sentiment: AnchorChainCalculator at 100% against Gobius's 0%. AnchorChainCalculator also leads on rating (5.0 vs 2.3) and iOS requirement (10.0 vs 15.0). Gobius's advantage is price (Free vs $12.99). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Gobius is free to download; AnchorChainCalculator costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AnchorChainCalculator holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 100% of AnchorChainCalculator's written reviews are positive against 0% of Gobius's.

AnchorChainCalculator ships an update every 3 weeks, Gobius monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | AnchorChainCalculator | Gobius |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/anchorchaincalculator/id1533741243/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/gobius/id6471569744/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Paid | **Free** |
| Size | 12 MB | 34 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Mathias Wagner](https://appshunter.io/developer/1533741245) | [Gobius Sensor Technology AB](https://appshunter.io/developer/1422407278) |

## What reviewers say

### AnchorChainCalculator

[App page](https://appshunter.io/ios/app/anchorchaincalculator/id1533741243)

Calculate the optimal amount of anchor chain or rope for secure anchoring based on vessel characteristics and sea conditions. Provides detailed load calculations and accounts for dynamic effects like swell and gusts. Supports both metric and imperial units, with options for chain-only or mixed rope/chain setups.

**Highlights:** Physics-based anchoring calculations, Customizable vessel and sea conditions, Chain-only or mixed rope/chain support, Load and swell absorption analysis, Metric and imperial unit support, Multiple vessel configuration storage, Basic and Expert modes

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

**In-app purchases:** none


### Gobius

[App page](https://appshunter.io/ios/app/gobius/id6471569744)

This application works with specific sensors to monitor fluid levels in tanks, displaying volume in percentages and liters. It provides installation guides, tank calculators for various shapes, and visual level indicators.

**Highlights:** Fluid level monitoring, Volume display in % and liters, Installation guides, Tank calculator for non-rectangular tanks, Visual fluid level indicators, Waterproof sensor compatibility

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

**In-app purchases:** none


## Frequently asked questions

### Is AnchorChainCalculator free?

AnchorChainCalculator costs $12.99, with no in-app purchases.

### Is Gobius free?

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

### Which has better reviews, AnchorChainCalculator or Gobius?

AnchorChainCalculator is rated higher. AnchorChainCalculator averages 5.0 out of 5 from 5 ratings, while Gobius averages 2.3 from 3 ratings.

### Do AnchorChainCalculator or Gobius have ads?

Neither AnchorChainCalculator nor Gobius shows ads.

### Which is updated more often, AnchorChainCalculator or Gobius?

AnchorChainCalculator ships an update every 3 weeks, and Gobius monthly. Most recently, AnchorChainCalculator was updated on October 24, 2026 and Gobius on October 24, 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.*