Pocket Marine is an iPhone app designed to help you keep track of all the vital information related to your aquarium, making it easier to maintain husbandry tasks, testing, stability, water changes, inhabitant stats, and more. It includes an encyclopedia of over 800 species of marine fish, invertebrates, and coral, along with a testing journal to keep track of over 30 of the most vital parameters.

The app features trends to plot graphs and visualize how stable each parameter is over time, an inhabitant diary to keep track of your latest additions, and a dosing log to keep track of any chemical additions to your tanks. There are also reminders with device notifications so you never miss an important event, a water change journal to keep a detailed log of your water changes, and a maintenance log to remind you of your last maintenance actions completed per tank. Additionally, the app offers a simple set of useful calculators such as alkalinity conversions, Celsius to Fahrenheit or gallons to liters, and more.