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Halo vs Seam
Two Dynamic Island apps for the Mac that both work with or without a notch and both do music, dictation, a calendar and coding agent status. Seam is $19.90 with a trial; Halo is $9.99 with none. Here's where they differ.
The short answer
Pick Halo if…
you want banners from any app in the notch, to answer Claude Code or Codex without the terminal, control of an external monitor, or a license for 3 Macs at half the price.
Pick Seam if…
you want to try before you buy, a Pomodoro timer with breaks, on-device speech translation, weather in the notch, or you're on macOS 14.
Side by side
| Halo | Seam | |
|---|---|---|
| Price | $9.99 one-time | $19.90 one-time |
| Macs per license | Up to 3 | Up to 2 |
| Free trial | No | Yes, 48 hours, no card |
| Refunds | Not listed | 14-day money-back guarantee |
| Requirements | macOS 15 or later, Apple silicon and Intel | macOS 14 or later |
| Works on Macs without a notch | Yes | Yes (Island mode) |
| Notifications from any app in the island | Yes, with a switch for each app | Not listed |
| Now playing with synced lyrics | Yes | Not listed |
| Dictation into any app | Yes: hold Fn and talk | Yes, on-device, plus speech translation |
| AI coding agent status | Claude Code, Codex, OpenCode, Gemini CLI and Cursor, with usage rings | Claude Code and other agents: progress and usage |
| Answer agent permission prompts from the notch | Yes: Claude Code, Codex and OpenCode | Not listed |
| External monitor control (DDC/CI) | Brightness, contrast and input | Not listed |
| File shelf | Yes, with AirDrop | Yes, with AirDrop |
| Clipboard history | Yes | Not listed |
"Not listed" means I couldn't find it on Seam's site on 10 November 2026, not that it's definitely missing. I haven't run the two apps side by side yet; when I do, measured numbers go here. If something is wrong, tell me and I'll fix it.
Where Halo is different
Notifications from any app
Halo puts the banner from any app in the notch, and the macOS banner in the corner steps aside. Each app has its own switch. How that works.
Answering your agents
When Claude Code, Codex or OpenCode stops to ask for permission, Halo shows the request in the notch and you answer there. How the hook behind it works.
External monitors
Halo changes a monitor's real brightness, contrast and input over DDC/CI from your keyboard. This needs Apple silicon and a monitor that supports DDC/CI. More on that.
Price and Macs
Halo is $9.99 for up to 3 Macs. Seam is $19.90 for up to 2.
Where Seam is ahead
Seam lets you try everything for 48 hours without a card and refunds within 14 days; Halo has no trial. Its Flow timer runs Pomodoro sessions with breaks, its voice typing also translates speech on the Mac, and it shows weather and Focus status in the notch. It runs on macOS 14, one version earlier than Halo, and installs with Homebrew. Seam's site quotes 0.1% CPU and 33 MB of memory; I haven't measured either app side by side yet.
Weighing more than these two? See the best Dynamic Island apps for Mac, or the free ones.
Questions
Is Halo a good Seam alternative?
Yes, if you want notifications from any app in the notch, to answer coding agents from the notch, external monitor control, or a lower price for more Macs. Seam has a 48-hour trial, a 14-day refund, a Pomodoro timer and speech translation.
Which is cheaper, Halo or Seam?
Halo is $9.99 one-time for up to 3 Macs. Seam is $19.90 one-time for up to 2 Macs, with a 48-hour free trial.
Do both work without a notch?
Yes. Both draw an island on iMacs, Mac minis and external displays.
Do both show Claude Code?
Yes. Seam shows coding agents' progress and usage. Halo shows Claude Code, Codex, OpenCode, Gemini CLI and Cursor sessions and also lets you answer permission prompts from the notch.
Can I use both?
You can, but only one island should own the notch at a time. Quit one before trying the other.
More comparisons: Halo vs Droppy · Halo vs Notchy · Halo vs Vibe Island · Halo vs Alcove · Halo vs NotchNook
Sources: Seam's site and Halo's site.
Try Halo
Dynamic Island for your Mac, notch or not. $9.99 one-time, no subscription.
Buy Halo