Dynamo 4+

For Netflix, YouTube, ..‪.‬

Tomas Znamenacek

    • 4.3 • 266 Ratings
    • $1.99



** Sync the flow of online video with the rhythm of your brain **


• Video stream controller for Safari
• Allows you to skip video ads
• Lets you customize the hotkeys
• Works on all your favorite websites
• Never collects any personal data


Upon launching the app, a button on the welcome screen will take you to the Extensions preferences pane in Safari. Click the checkbox next to the item called Dynamo and you're all set. A brief controls guide will appear.


While watching video in Safari, press these keys on your keyboard to control the playback:

[S] slows down any given scene
[D] sets the speed back to default
[F] makes the content flow faster
[E] lets you skip the ads


All keyboard shortcuts are configurable. Click the Dynamo icon in your Safari toolbar and then choose the settings icon to edit the hotkeys.


Safari shows you a notice that says the extension can read personal information and browsing history. It's a general caution for every extension that changes the behavior of websites' elements. Dynamo does not read nor collect any personal data. We've deliberately designed this app so that we can't even encounter any. All Dynamo's processes run solely on your machine.


You might need to quit Safari in order to update Dynamo via Mac App Store. Closing the browser is not sufficient, quit Safari with command + Q or go to menu bar and choose Safari > Quit Safari.


Reach us at hello@dynamoformac.com with any issues or suggestions.

What’s New

Version 2.3.0

• You might need to select Safari > Quit Safari to complete the update
• This update fixes an issue where certain keystrokes could be ignored on some websites
• Reach us at hello@dynamoformac.com with any issues or suggestions

Ratings and Reviews

4.3 out of 5
266 Ratings

266 Ratings

Hertyweb ,

Works! Only for Safari.

Use keys to speed up, slow down, and skip (not just ads, but also to the end of the video, which I have found really handy!). Simple and it works. Small hiccup in playback when you change speed, but that's really not a big deal.

Boy oh boy would I like a Chrome version, though. I'm a HEAVY Chrome user with loads of customizations and extensions. A Chrome version of this app would get six out of five.

S.J.Daniels ,

Could Be Better, and Easily!

I love this app, most sincerely worth every penny. The problem is not with the app, but with the developer. At bout every 10th skip (E) it requires you to rate the app. You can choose to ignore, but it wont skip. What's the point? Apple is not going to register the same user ID giving your app 5 stars over and over again. I gave you five stars and an excellent review, so why persist? Either develop another app and label it pro, or raise your pricing. It's more anoying that you just created another step in clicking skip. Now I click E your rating pop-up appears and wether I rate or close by that time frame the skip button has illuminated.

Siam.S ,

It's good, but annoying. PLEASE Solve it!

I've used many video speed controllers for years, both on Mac and Windows. Video Speed Controller on chrome is a great example.

This extension works, but has one MAJOR ANNOYANCE. It pauses the video with every change of speed. Why?? It helps with nothing, rather just breaks the flow, and wastes time. Also, the "display of speed" takes up so much space on videos. I wish there was an option to make it smaller or just put it in the corner where it isn't so intrusive. But I can still live with that, but the pausing effect drives me nuts, because I use it a lot.

App Privacy

The developer, Tomas Znamenacek, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.