Splynek

Native macOS download manager that uses every network interface you have, in parallel. Wi-Fi + Ethernet + iPhone tether, verified, cooperative across your LAN, with a local-AI assistant.

Download for macOS View on GitHub

macOS 13+ Zero deps MIT Licence ~11 k LOC Swift

Aggregated bandwidth

Every outbound socket pinned to a specific NIC via IP_BOUND_IF. Wi-Fi plus Ethernet plus iPhone tether plus Thunderbolt — Splynek pulls the same file over all of them and reassembles it verified.

LAN cache

Other Splyneks on your network advertise themselves over Bonjour. Same file on your colleague's Mac arrives over gigabit instead of the internet.

Phone remote

QR code pairs any phone with this Mac's web dashboard. Paste URLs from your iPhone's Safari share sheet; watch throughput tick up live.

Local-AI assistant

Ollama on your machine, no cloud. Type "the latest Ubuntu 24.04 desktop ISO", get the direct URL. Natural-language history search too.

Verified bytes

SHA-256 on every completed download. Per-chunk Merkle integrity when a .splynek-manifest sibling exists. BitTorrent v2 (BEP 52) supported.

Scriptable

splynek CLI, Raycast extension, Alfred workflow, Chrome extension, Shortcuts / App Intents, and a documented REST API with OpenAPI spec — all local.

~2–3× faster than single-path.

When your Mac has two usable links — say, hotel Wi-Fi plus an iPhone hotspot over USB — a single-path download is throttled by the weaker of the two. Splynek uses both.

Chrome 38 MB/s

Splynek 117 MB/s

Benchmark view inside the app generates a shareable PNG with your own numbers.

What's in the box

Multi-interface HTTP aggregation (IP_BOUND_IF)
BitTorrent v1 + v2 + hybrid (BEP 3/6/9/10/11/52)
LAN fleet cache (Bonjour + content-addressed)
Mobile web dashboard (QR-paired)
Local-AI URL resolution + history search (Ollama)
AI Concierge (chat-first, local)
Smart enrichment (.sha256 / .torrent / .metalink siblings)
Duplicate detection (don't re-download what you have)
Per-interface DoH (DNS over the same lane)
Metalink / Merkle manifest verification
Chrome + Safari bookmarklets + Raycast + Alfred
Documented REST API + CLI + OpenAPI spec
Menu-bar-only mode + launch at login
Host daily caps + cellular budget
Session restore across reboots
Rate limiting + privacy-mode toggle + regenerate-token

Get it

Download DMG Homebrew cask Build from source

Splynek ships ad-hoc signed by default. On first launch, right-click the app in Finder and choose Open; macOS remembers your choice. A notarised build is tracked on the roadmap.