Sotto

Sotto Pro

More intelligence.
One-time purchase.

Launch price ¥4,980, including one year of standard updates. Your latest eligible version keeps working forever.

Continue to secure checkout

From purchase to Pro

  1. Buy Pro through the hosted checkout. The payment provider handles your payment details.
  2. Receive a license key by email. Your key starts with SOTTO1..
  3. Paste it in Sotto Settings → License. Sotto verifies the signature offline and unlocks Pro.

What Pro adds

Smarter Japanese

Industry dictionaries, unlimited user dictionary, and dictionary import/export.

Useful context

L2 rewriting, per-app profiles, and screen context.

Before sales open, the checkout link remains in preparation. Once enabled, the button completes payment and license-key delivery.

Read the full pricing and update policy