Your aquariums, always in balance.

Open the Tanks tab and tap “Add tank”. Give it a name (e.g. “Reef 300L”), pick the type (freshwater, saltwater, reef, planted, brackish) and save. Gurglee already suggests the right parameters and target ranges for that kind of aquarium, so you can start right away.

When you create a new tank, Gurglee offers setup mode: a short wizard that walks you through the nitrogen cycle, the 4-8 weeks a tank needs to “mature” before it can host animals.

It explains the three stages (ammonia peak → nitrite peak → nitrate), asks a few questions about your tank (new or seeded water, with or without fish, live/dry rock or DSB for saltwater) and proposes the right reminders. The tank then shows a cycle card that reads your readings and tells you where you stand — celebrating milestones and telling you clearly when it's ready for its first guests. You can also start it later from the tank menu, and finish it whenever you like. The wizard, the cycle card and the milestones are free; the automatic reminders, the comparison chart (your cycle vs the typical curve) and the fishless ammonia-dose calculator are Premium.

Go to the Measure tab and type naturally, e.g. “calcium 420 in the reef” or “kh 7.8”. Gurglee recognises parameter, value, unit and tank, converts to the reference unit and shows you its interpretation with a confidence score. Confirm with a tap and it's saved. Everything runs on-device, even offline.

Yes. In the Measure tab tap the microphone icon and dictate the value (e.g. “nitrate twenty in the freshwater”). Voice recognition is the operating system's on-device engine; the recognised text goes through the same parser as typed input. It needs the microphone permission. Where dictation isn't available (e.g. Windows) the app tells you and you can type instead.

Open a tank and tap a parameter: you'll see the trend chart with the target band highlighted. The tank dashboard shows at a glance how many parameters are balanced and which are out of range, with an alert when a value leaves the limits you set.

In the Activities tab tap “Add” and choose the kind: reminder, water change, fertilization, dosing or medication course. You can link a product and dose, set a recurrence (custom too) and, for medications, an end date. When it's due you get a local notification on the device.

From the menu (top icon) open the Calculators: water change (with an automatic suggestion of how much to change, sump included), salt, KH and calcium. Enter the required data and Gurglee tells you how much to dose. They're all free and work offline.

Yes: Gurglee is offline-first. Your aquarium data is stored on the device and that's the source of truth. No account is required to use it. The cloud is optional and only needed if you want to sync across multiple devices.

Open the Account section (profile icon) and sign in, Google included. With an account you can start cloud sync: on the Free plan it's manual (“Sync now”), on Premium it becomes automatic in the background. Your local data remains the source of truth.