A Queue-based Keyboard Built for Thread Posting.
Copy your long essay, switch to the Spool keyboard, tap Paste & Split, and tap Insert to post segment by segment. Zero copy-paste roundtrips.
Spool Keyboard
The Tedious Dance of Thread Posting is Over.
Social networks love threads, but publishing them on mobile has always been painful. Spool turns the keyboard into a pure execution pipeline.
Quick Mode in Keyboard
No need to switch apps. Simply copy your draft, switch to Spool keyboard, and tap "Paste & Split". Your text is immediately parsed and queued.
Smart Platform Presets
Tailored character boundaries for Threads (500), X / Twitter (280), Bluesky (300), and Mastodon (500). Custom limits and automatic numbering included.
100% Private & Local
All queueing and splitting happen strictly on your iPhone. Zero network calls, zero servers, zero third-party analytics. Your thoughts stay yours.
Three Taps to a Published Thread.
Keep your writing rhythm unbroken from initial thought to final post.
Copy Any Text
Write freely in Apple Notes, Bear, Obsidian, or anywhere you like, and copy your entire article or thoughts.
Paste & Split
Switch to Spool keyboard in your social app. One tap on [Paste & Split] slices your text cleanly according to platform limits.
Tap Insert to Send
Tap [Insert], hit send, and repeat. The keyboard steps through your queue automatically until your thread is complete.
Built with Privacy as the Foundation
Spool does not collect, transmit, or monetize your keystrokes or clipboard contents. We believe tools should be transparent, reliable, and respectful.
Designed for Power & Polish.
Thoughtfully engineered details that make long-form posting a delight.
Draft Library & Compose Hub
Need to polish before queueing? Use the Spool main app to preview segments, reorder with drag & drop, or merge adjacent segments upward.
System Share Extension
Select text in Safari, WeChat, or document readers and tap "Share with Spool" to split and queue right from the system share sheet.
Swipe to Dismiss Keyboard
Dismiss the custom keyboard with a dedicated icon or a gentle downward swipe on the header bar whenever you need your screen back.
Frequently Asked Questions
No. Spool operates 100% locally on your iPhone. There are no remote servers, no cloud storage, and no tracking libraries. Your texts and clipboard never leave your device.
Full Access is only required if you want the custom keyboard to directly read your clipboard when you tap "Paste & Split" and communicate with the main app via App Group. Even with Full Access enabled, Spool has zero network code and makes no internet connections.
Spool includes built-in presets for Threads (500 chars), X / Twitter (280 chars), Bluesky (300 chars), and Mastodon (500 chars). You can also define custom character limits and numbering styles for any other platform.
Open iOS Settings > General > Keyboard > Keyboards > Add New Keyboard... > select "Spool". Then tap "Spool" and toggle "Allow Full Access" if you wish to use one-tap clipboard splitting.