Syntax Planet

Koevo Privacy Policy

Last updated October 17, 2026

1. Who we are

Koevo is made by RankAiro Ltd, trading as Syntax Planet ("we", "us"). The app turns text into speech and lets you create a copy of your own voice. This policy explains what information the app handles and why.

2. No account

Koevo does not ask you to sign up. We do not collect your name, email address, phone number or any login. The app identifies your device with a random identifier and Apple's App Attest and DeviceCheck services, which confirm that requests come from a genuine copy of the app on a real Apple device.

3. What the app processes

Text you type or paste: sent to our server and to our speech provider only to generate the audio you requested. We keep a usage record (byte count, voice used, cost) without the text itself. Generated clips are stored only on your device.

Voice samples: if you choose to clone your voice, the recording you make is sent to our speech provider to build your private voice model. We keep the sample for up to 365 days as proof of your consent, then delete it. Your voice model is private to your device and is deleted when you delete it or delete your data.

Credits and purchases: your credit balance and purchase status are stored against your device identifier. Payments are handled by Apple; we never see your payment details.

Device identifiers: a random device ID, App Attest keys and a DeviceCheck token. DeviceCheck lets us remember that a device already received its free credits, even after the app is reinstalled.

4. Advertising

The free plan shows rewarded video ads through Google AdMob. Before the first ad, iOS asks for your permission to track; if you decline, ads are shown without cross-app tracking. AdMob may process device identifiers, approximate location from your IP address and ad interaction data to serve and measure ads; Google's privacy policy applies to the ads it serves. Koevo Pro shows no ads.

5. Service providers

Fish Audio generates speech and voice models from the text and samples you provide. Cloudflare hosts our server and database. Apple handles payments and device attestation. Google AdMob serves ads. RevenueCat processes subscription status. Each provider only receives what it needs for its task.

6. Voice library

The voices you can browse come from Fish Audio's public library. Previews and pictures are loaded from Fish Audio when you open them. Voices marked as community voices are uploaded by other users of Fish Audio; we do not control their content.

7. Your choices

Delete my data in Settings removes your voice models and samples, your usage records and your device record from our servers, and clears clips and history on your device. You can also change the app language, reset ad tracking permission in iOS Settings → Privacy & Security → Tracking, and manage or cancel a subscription in your Apple ID settings.

8. Children

Koevo is not directed to children under 13 and we do not knowingly process information from them. If you believe we have, email us and we will delete it.

9. Changes

We will update this page and the copy inside the app when our practices change. The date at the top shows the current version.

10. Contact

Questions or data requests: hello@syntaxplanet.com