Dynamic Range segmentation
Reassigns byte ranges dynamically to keep every connection working.
动态重新分配字节区间，让每条连接持续工作。
Swifty Download ManagerDownload faster.
Resume anytime.
An Apple-native download manager with optimized HTTP Range segmentation, parallel connections, and persistent resume.
原生 Apple 平台下载工具，支持动态 HTTP Range 分段、多连接并行与可靠断点续传。
Install
Under review
Mac App StoremacOS release
Under review
App StoreiPhone & iPad release
Public beta
Join the beta onTestFlightTestFlightMac, iPhone & iPad beta
Available now
Chrome Web StoreBrowser extension
Apple, the Apple logo, App Store, Mac App Store, and TestFlight are trademarks of Apple Inc.
Built for the whole transfer
Fast by design.
Ready to resume.
Split the file intelligently, keep every connection working, and resume interrupted transfers without throwing progress away.
- conn 119.8 MB/sdone
- conn 218.9 MB/s
- conn 322.6 MB/s
- conn 417.2 MB/s
- conn 524.1 MB/s
- conn 69.8 MB/s
- conn 719.5 MB/s
- conn 816.3 MB/s
- new21.4 MB/s
When a connection finishes, the segment with the most bytes left is halved and the freed connection takes the back half. Nothing sits idle.
某条连接完成后，剩余最多的分段会被对半拆分，空闲连接接管后半段。没有连接闲置。
Use every connection
Fetches independent ranges in parallel to use more available bandwidth.
并行获取独立区间，尽可能利用可用带宽。
Resume with confidence
Keeps progress on disk so interrupted downloads can continue.
将进度持久保存到磁盘，中断后可以继续下载。
macOS Lock Screen
Keep an eye on every download.
Even while your Mac is locked.
下载状态，
抬眼可见。
锁屏时也一样。
See recent downloads, live progress, transfer speed, time remaining, and task status without unlocking your Mac.
无需解锁 Mac，即可查看最近下载、实时进度、传输速度、剩余时间与任务状态。
Enable it in Settings可在设置中开启Off by default默认关闭
Choose your route
Two engines.
One clear choice.
Choose multi-connection libcurl for HTTP Range acceleration and granular resume control, or URLSession for system-native background transfers.
Power×8
libcurl
Optimized segmentation keeps Range connections working toward your available bandwidth.
- Dynamic HTTP Range segmentation
- Multiple parallel connections
- SQLite-backed resumable state
- Per-connection progress and bandwidth control
Native☁
URLSession
For system-native background transfers.
- Native background downloads
- System-managed resume
- Apple system trust
- Energy-aware networking
Safari + Chrome
One click.
SDM takes it from here.
On macOS, extensions for Safari and Chrome recognize download links, eligible click-triggered downloads, and the Download with SDM context-menu action.