How can we help?

Open Settings in the app and set the goal you want. The suggested goal follows the European Food Safety Authority's guidance. If your doctor has given you a fluid limit, use that.

Choose the unit in the app's Settings. Every amount, widget and the Apple Watch follow it.

Hydrolotl counts each drink by how much it adds to your water for the day. Water counts in full; some drinks count a little less. Today's list shows both numbers.

Turn on Sync with iCloud in Settings on both devices and make sure they use the same Apple Account. Syncing can take a moment after you open the app.

Open the Hydrolotl Plus screen and tap Restore Purchases. Purchases follow your Apple Account.

Subscriptions are managed by Apple: open the Settings app, tap your name, then Subscriptions, and choose Hydrolotl.

In the app, Settings > Delete all data erases your log from the device and from your private iCloud. It can also remove the entries Hydrolotl saved in Apple Health.

Yes. Tracking your water is free, with no ads and no time limit. Hydrolotl Plus is optional and adds rare morphs, a monthly plant and décor pack and 30-day trends.

Nothing bad. Progress never resets, and your axolotl is waiting where you left it. The next drink picks up where you stopped.

Water, tea, matcha, coffee, milk and sparkling water. Hold a glass, mug or bottle to change its size.

Yes, if you allow it. Hydrolotl can save the water and caffeine you log to Apple Health and read water from it, so your totals match. Health data is never sent to us.

No. Everything works on the iPhone alone. On Apple Watch you can pour with the Digital Crown, log with Double Tap and catch pearls from a notification.

iPhone and iPad with iOS 17 or later, and Apple Watch with watchOS 10 or later.