Lyra

Just type.
Send it better.

Lyra fixes your writing as you type — in Mail, Slack, WhatsApp, and every Mac app.

Download for Mac

Free · Apple Silicon · macOS 14+

Ready to see how it works?

Works anywhere
you can type.

Mail, Slack, Cursor, Notion, WhatsApp — Lyra rewrites where you already write. No window to switch to.

Slack
Hey, could you send me the deck before standup? Tab
+ Aa @

Lyra learns how
you write
to each person.

The same thought doesn't sound the same to your manager, your mum, and the group chat. Lyra keeps your voice, per person.

You typed cant make it tonight, can we move it

I can't make tonight's session — could we move it to later this week? Sorry for the short notice.

Learned privately from how you actually write — stored on your Mac, never uploaded. See exactly what goes where.

Quietly intelligent.
Never in the way.

Works everywhere

Mail, Slack, WhatsApp, Notion, your CRM — if you can type in it, Lyra works in it.

Private, obviously

Everyday writing never leaves your Mac — and one switch makes that absolute. See what goes where.

Deterministic first

Mechanical fixes come from an open-source rules engine, not AI guesses — instant, and never wrong about its/it's again. See the engine.

Knows when to shut up

A quality gate prefers silence over a suggestion Lyra isn't sure about. Your meaning is never "corrected."

Your words stay yours

Names, jargon, Hinglish, lowercase chat — Lyra preserves your register instead of sanding it into LinkedIn voice.

Works offline

The core runs on your Mac, so a flight or a dead café Wi-Fi changes nothing.

macOS 14+ · free · on-device

“For the most part exactly what I want from a writing assistant.”

r/macapps

“The fact that it just works in every app — that's the bit Grammarly never got right for me.”

r/macapps

Built in public by a solo founder. Say hi → @buildbypratik

Simple pricing.
No tricks.

Free forever for everyday use. Pro for power users who write all day.

Free

$ 0

Must-have features for everyday use.

  • Unlimited everyday rewrites — 100% on-device
  • Works in every Mac app
  • Personal dictionary
  • Works offline
Download

Apple Silicon Mac, macOS 14+

Pro

$ 6 .99
/month $83.88 $39.99/year — save 52%

For people who write all day.

  • Everything in Free, plus:
  • Cloud-grade polish for the hard cases
  • Reply drafting
  • ⌘⌘ tone rewrites
  • Priority support
Start Free Trial

Cloud features are optional — Strict Local-Only mode turns them all off.

30-day refund window on Pro — see Terms.

Teams / regulated environments: get in touch — founder@heylyra.co.uk

Product demo

See Lyra
in action.

Three moments from a normal day on your Mac. Hover any clip to play it.

Rewrite anywhere

Hover to play · click for sound

Inbox, handled

Hover to play · click for sound

Reply Assist

Hover to play · click for sound

FAQ

Questions,
answered.

Everything you might want to know before you download. Still curious? Message me on X.

Your everyday writing never leaves your Mac — rewrites run on-device. Pro can use cloud polish for hard cases; it's optional, and Strict Local-Only mode turns all cloud off completely. Exactly what runs where: heylyra.co.uk/cloud.

Yes for everything that runs on your Mac — the rewrites you get while typing need no connection at all. The optional Pro cloud extras simply pause while you're offline and resume when you're back; in Strict Local-Only mode they never run in the first place. Here's the full breakdown.

Grammarly floats a widget over your text and asks you to review it. Lyra shows a quiet pill near your caret — Tab accepts, keep typing to ignore. It preserves your meaning and your register rather than formalising everything, your everyday writing stays on your Mac, and it learns how you write to each person. Fuller comparison on the Grammarly alternative for Mac page.

Apple's Writing Tools need you to select text and invoke a menu. Lyra is ambient — the fix arrives as you type, with nothing to select. It learns your voice per person, and it behaves identically in every app rather than best in Apple's own. Side by side on the Apple Writing Tools alternative page.

Any Apple Silicon Mac (M1 or later) running macOS 14 or newer. Lyra sizes the model to your Mac's memory automatically, so it stays fast on a base MacBook Air and gets a quality bump where there's headroom. Intel Macs aren't supported.

Free is genuinely useful forever: unlimited everyday rewrites on your Mac, in every app. Pro is $6.99/month or $39.99/year and adds cloud-grade polish for the hard cases, reply drafting and ⌘⌘ tone rewrites. Pro payments carry a 30-day refund window — see Terms.