Pricing

Detect for free. Pay only to retune.

The web detector, extension, mobile detection, and full desktop library analysis are free — no limits, no account needed. Conversion credits power retuning in the desktop app: one credit converts one song, and credits never expire.

Album

$9.99 $0.40 per song

25 conversions

Retune an album or two.

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Most popular — cover your favorites.

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Collection

$59.99 $0.12 per song

500 conversions

For serious collections.

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Unlimited

$99.99 one-time, lifetime

Unlimited conversions

Your entire library, forever. Includes Pro.

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How buying works

Sign in to the desktop app with your email — new accounts get 5 free conversions — then buy a pack right from the app (secure checkout by Stripe). Credits live on your account, not your device, so they follow you everywhere you sign in.

HZ Detect Pro — $14.99, lifetime

Pro upgrades the mobile app: exact measured tuning (e.g. 434.7 Hz), unlimited detection history, and no ads — ever. Purchased once on iOS or Android, and synced to your account across devices. The Unlimited pack includes Pro.

Fair-play answers

Credits never expire. One account works on all your computers and phones. A conversion is only spent when a song converts successfully. Questions or a purchase issue? We'll sort it out.