Terms of Service

By downloading or using Reefkeel (“the app”), you agree to these terms. Please read them — the dosing disclaimer in particular. If you don't agree, don't use the app.

1. What Reefkeel is

Reefkeel is a tool for hobbyists to log reef-aquarium water chemistry, chart it over time, and estimate dosing of additives. It is an informational and planning aid for your own use.

2. Dosing is an estimate — verify before you dose

Reefkeel's dosing recommendations are estimates calculated from the readings, tank volume, and additive concentrations you enter. They are only as accurate as the data you provide and the published concentrations of the additives selected.

• Always verify any dose against your additive manufacturer's instructions before adding it to your tank.
• Re-test after dosing and make large corrections gradually — stability matters more than speed.
• Reefkeel does not guarantee any particular water parameter, coral growth, or livestock health, and is not a substitute for your own judgment and testing.

You are solely responsible for what you add to your aquarium. To the fullest extent permitted by law, PLAYRIOT is not liable for livestock loss, equipment damage, or any other harm arising from dosing decisions or reliance on the app's output.

3. No affiliation with labs or brands

Reefkeel is an independent app. References to ICP laboratories (such as Triton, ATI, or Oceamo) or to additive brands are for your convenience in entering and identifying your own products only. Reefkeel is not affiliated with, endorsed by, or sponsored by any of them, and all trademarks belong to their respective owners.

4. Subscriptions & purchases

Reefkeel Pro is available as an annual auto-renewing subscription ($24.99/year) or a one-time lifetime purchase ($39.99), sold through the Apple App Store.

• Payment is charged to your Apple ID at confirmation of purchase.
• The annual subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Your Apple ID is charged for renewal within 24 hours before the period ends.
• You can manage or cancel a subscription in your device's Settings → Apple ID → Subscriptions. The lifetime license is a one-time purchase and does not renew.
• Purchases and refunds are handled by Apple under Apple's Standard EULA and the App Store terms.

5. Your data

Your logs are stored on your device, not on our servers. You are responsible for keeping your own backups (for example via the Pro export feature); deleting the app deletes its data. See our Privacy Policy for details.

6. Acceptable use

Use the app for its intended purpose. Don't attempt to reverse-engineer, resell, or misuse it, and don't use it in any way that violates applicable law.

7. Changes & availability

We may update, change, or discontinue features over time. We may also update these terms; continued use after an update means you accept the revised terms. The app is provided “as is,” without warranties of any kind to the extent permitted by law.

8. Contact

Questions about these terms? Email [email protected].