# Fender Online Tools vs Nautical Dog Math Helper

The clearest difference is update cadence: Nautical Dog Math Helper at weekly against Fender Online Tools's every 6 months. Nautical Dog Math Helper also leads on ratings volume (3 vs 1). Fender Online Tools's advantage is iOS requirement (11.0 vs 16.6). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Fender Online Tools against 5.0 for Nautical Dog Math Helper. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Fender Online Tools ships an update every 6 months, Nautical Dog Math Helper weekly. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Fender Online Tools | Nautical Dog Math Helper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/fender-online-tools/id1503298239/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/nautical-dog-math-helper/id6744040776/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | Free |
| Size | 71 MB | 6 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Trelleborg AB](https://appshunter.io/developer/423282462) | [Jill Russell](https://appshunter.io/developer/1792014832) |

## What reviewers say

### Fender Online Tools

[App page](https://appshunter.io/ios/app/fender-online-tools/id1503298239)

This app helps users select and specify fender systems for various applications. It offers tools for calculating berthing energy, generating specifications, and selecting appropriate fenders based on project requirements and industry standards.

**Highlights:** Fender selection tool, Berthing energy calculation, Fender Specification Generator, Bollard Specification Generator, Ship-to-Ship Fender System Selector, PIANC and British Standards compliance

**Features:** macOS Compatibility

**In-app purchases:** none


### Nautical Dog Math Helper

[App page](https://appshunter.io/ios/app/nautical-dog-math-helper/id6744040776)

This app simplifies essential maritime calculations for professionals. It offers tools for navigation, maneuvering, and vessel operations, ensuring accuracy and efficiency at sea. Designed for ease of use, it provides critical data even without internet access.

**Highlights:** Rate of Turn (ROT) Calculation, Turn Transfer Computation, RPM and Speed Calculations, Anchor Swing Radius, Distance, Speed, Time (DST), Offline Functionality, Night Mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fender Online Tools free?

Fender Online Tools is free to download, with no in-app purchases.

### Is Nautical Dog Math Helper free?

Nautical Dog Math Helper is free to download, with no in-app purchases.

### Which has better reviews, Fender Online Tools or Nautical Dog Math Helper?

Fender Online Tools and Nautical Dog Math Helper are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Fender Online Tools or Nautical Dog Math Helper have ads?

Neither Fender Online Tools nor Nautical Dog Math Helper shows ads.

### Which is updated more often, Fender Online Tools or Nautical Dog Math Helper?

Fender Online Tools ships an update every 6 months, and Nautical Dog Math Helper weekly. Most recently, Fender Online Tools was updated on October 15, 2026 and Nautical Dog Math Helper on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*