# Fender Online Tools vs InvertDark for Safari

The clearest difference is price: Fender Online Tools at Free against InvertDark for Safari's $1.99. Fender Online Tools also leads on rating (5.0 vs 3.0) and iOS requirement (11.0 vs 16.6). InvertDark for Safari's advantage is update cadence (every 5 weeks vs every 6 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Fender Online Tools is free to download; InvertDark for Safari costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fender Online Tools holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Fender Online Tools ships an update every 6 months, InvertDark for Safari every 5 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fender Online Tools | InvertDark for Safari |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fender-online-tools/id1503298239/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/invertdark-for-safari/id6736727849/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | **Free** | Paid |
| Size | 71 MB | 9 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Trelleborg AB](https://appshunter.io/developer/423282462) | [hkitago](https://appshunter.io/developer/302896514) |

## 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


### InvertDark for Safari

[App page](https://appshunter.io/ios/app/invertdark-for-safari/id6736727849)

Transform any website into a dark theme with this Safari extension. It automatically applies a comfortable, eye-friendly dark mode for nighttime browsing without any setup. Enjoy clear videos and images while reducing screen glare.

**Highlights:** Automatic dark theme for all websites, No configuration required, Eye-friendly browsing, Preserves video and image clarity, Lightweight and efficient

**Features:** Safari Extension, Vision Pro support

**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 InvertDark for Safari free?

InvertDark for Safari costs $1.99, with no in-app purchases.

### Which has better reviews, Fender Online Tools or InvertDark for Safari?

Fender Online Tools is rated higher. Fender Online Tools averages 5.0 out of 5 from 1 ratings, while InvertDark for Safari averages 3.0 from 2 ratings.

### Do Fender Online Tools or InvertDark for Safari have ads?

Neither Fender Online Tools nor InvertDark for Safari shows ads.

### Which is updated more often, Fender Online Tools or InvertDark for Safari?

Fender Online Tools ships an update every 6 months, and InvertDark for Safari every 5 weeks. Most recently, Fender Online Tools was updated on November 3, 2026 and InvertDark for Safari on October 30, 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.*