Video Speedifier vs Prime Speed Controller

Take control of every video you watch. Video Speedifier is a clean, powerful Safari extension that lets you adjust playback speed on any website with precision and ease. Use the smooth slider for fine-grained control (0.1× increments) or tap the quick preset buttons for common speeds. Turn on Overdrive when you want to push speeds even higher, or take it slow with Slo-mo mode. It works across YouTube, Netflix, online courses, Twitch, and most other video players — including tricky ones that try to reset the speed. Key Features • Precise speed control from 0.01× up to 5× • Customizable preset buttons • Overdrive mode for faster playback • Slo-mo mode for slower playback • Works on iPhone, iPad, and Mac • Clean, modern interface built with SwiftUI • Intelligent handling of dynamic and embedded videos Getting started is simple: install the app, enable Video Speedifier in Safari’s Extensions settings, and you’re ready to go. The extension then appears in your toolbar whenever you need it. Whether you’re speeding through lectures, slowing down language content, or just want to watch at your own pace, Video Speedifier gives you full control without leaving the page.

Prime Speed Controller is a Safari extension that adds A-B loop repeat, playback speed control, seek, and time-saved tracking exclusively to Prime Video on iPhone and iPad. Perfect for language learners and anyone who wants to get more out of Prime Video. ■ A-B Loop Repeat Tap A to mark a start point, tap B to mark an end point — the video loops that segment continuously. Replay any dialogue, scene, or lecture as many times as you need. ■ Playback Speed 15 presets from 0.5x to 5x, with 0.05x fine-tuning. Subtle steps like 1.1x and 1.2x let you boost speed while keeping audio clear. ■ Forward & Rewind Choose 5, 10, 15, or 30-second intervals. Jump back instantly to catch missed dialogue. ■ Time-Saved Tracker The panel shows how much real time you have saved by watching above 1.0x speed, accumulated across sessions. Key Features • A-B Loop: mark any segment for continuous repeat • 15 playback speed presets from 0.5x to 5x • Fine-tune in 0.05x steps • Forward and rewind at 5, 10, 15, or 30 seconds • Time-saved tracker displayed in the panel • Settings saved automatically across sessions • Works on iPhone and iPad • Activates only on Prime Video — no other sites • No data sent to external servers How to Use 1. Follow the in-app guide to enable the extension in Safari Settings. 2. Open Prime Video in Safari and start a video. 3. Use the floating panel to set speed, seek interval, or A-B loop points. Playback speed or seeking may be restricted by Prime Video for certain titles. This app does not detect or skip advertisements. This is an independent, unofficial Safari extension. It is not provided, endorsed, or approved by Amazon, Prime Video, or their affiliates. Amazon and Prime Video are trademarks or registered trademarks of their respective owners.