TankLog: Aquascape
Fish Tank Log & Reminders
About
This app helps you meticulously track your aquarium's water chemistry, maintenance, and livestock. It offers detailed logging for water parameters, customizable schedules, and equipment inventory, all while prioritizing user privacy with no data collection.
What's New in TankLog
1.40
August 15, 2026
v1.40 — ACT ON IT ACTIVITY CALENDAR — NOW ACTIONABLE Care schedule due dates now appear on the Activity Calendar. Each due date shows its status — Upcoming, Due Today, or Past Due — and tapping any overdue or due-today item jumps you straight to the log form. Your calendar isn't just a history view anymore: it tells you what needs doing and gets you there in one tap. TEST LOG — BLANK SLATE Water test fields now open blank, so you're always entering real readings — not staring at last session's numbers already filled in. A new Recent section at the top lets you pull in your last test with one tap if you want a starting point. And when a field is empty, a subtle hint shows what you measured last time. Free. No login. No subscription.
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FAQ
What is TankLog's privacy policy?
TankLog is designed with privacy as a core feature. It requires no login, no account, and no subscription. All data is stored locally on your device, with no servers collecting or accessing your information. This means no analytics tracking and no third-party access to your aquarium records.
Can I track custom water parameters in TankLog?
Yes, you can customize which parameters appear when you log a water test. You can toggle optional parameters like Phosphate (PO₄) or TDS on or off, and even disable KH and GH if you don't test them. Ammonia and Nitrite are always tracked.
How does TankLog help with CO₂ management?
TankLog estimates dissolved CO₂ levels based on your pH and KH readings. It displays this estimate in color-coded zones (very low, low, ideal, high, at risk), which is particularly useful for planted tank enthusiasts aiming for optimal CO₂ ranges without stressing fish.
Does TankLog offer reminders for aquarium maintenance?
Yes, you can build a fully customizable maintenance schedule within TankLog. This includes tasks like water changes, filter cleans, fertilizer dosing, and equipment checks. The app will send push notifications when each task is due, and overdue tasks are flagged on the dashboard.
What devices is TankLog compatible with?
TankLog is available for iPhone, iPad, and iPod. It is designed to work across these Apple devices, allowing you to manage your aquarium logs wherever you go.
How often is TankLog updated?
The latest version of TankLog is 1.31, and it was last updated on June 25, 2026. While specific update frequency isn't detailed, this indicates active development and support for the application.
What is the user rating for TankLog?
TankLog has received an excellent rating of 5.0 stars from 3 user ratings. This high score suggests a very positive user experience and satisfaction with the app's features and functionality.
Can I export my aquarium data from TankLog?
Absolutely. TankLog allows you to export your full log at any time in a portable format. This ensures that your aquarium history belongs to you and can be easily transferred or backed up as needed.