It also includes your internet connection ping and RPM, which are two different ways of measuring latency.
By default, tests are run in parallel to better reflect real-world situations. You can change this in the preferences.
The app also comes with support for Shortcuts.
You can view the history of results over time and export to CSV or JSON. You can also add a note to each entry.
The app is free without ads because I love making apps. Consider leaving a nice review.
You can contact me through the feedback button in the “Help” menu or at sindresorhus@gmail.com
■ FAQ
‣ How does it compare to Speedtest by Ookla?
The Speedtest app uses a nearby server, which means the speed does not actually reflect real-world usage — it shows the most optimal scenario. Its requests are also often prioritized by ISPs, which skews the numbers even more. Speediness also looks more like a proper macOS app and it has support for Shortcuts.
‣ How does it compare to fast.com?
The problem with fast.com is that it's run by Netflix, and Netflix's servers are often prioritized (and sometimes throttled), meaning you won't always get a realistic value. It pretty much gives you your speed for watching Netflix.