# Tankbook: Aquarium Log — Water tests, trends, reminders

> Aquarium water parameter logging, trend analysis, and maintenance reminders for fishkeepers. (iPhone/iPad app by FABIAN OSORIO.)

- Source: https://appshunter.io/ios/app/tankbook-aquarium-log/id6787217887 (this page in markdown: same URL + `.md`)
- Developer: [FABIAN OSORIO](https://appshunter.io/developer/1875442393)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Rating: 4.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, European Spanish
- Released: 2026-08-25
- Data updated: 2026-10-25
- Monetization: free with in-app purchases

## What is Tankbook?

Tankbook is your aquarium's journal: log water parameters in seconds, see trends at a glance, and get maintenance reminders. Built for fishkeepers who want a reliable tool — not another subscription.

FAST LOGGING
• All your parameters on one screen: pH, temperature, ammonia, nitrite, nitrate, GH and KH
• Last value shown as reference, numeric keypad, save in one tap
• UNLIMITED measurements, free forever

CLEAR TRENDS
• One chart per parameter with its healthy range shaded
• Catch an ammonia spike or creeping nitrates before they hurt your fish

MAINTENANCE ON AUTOPILOT
• Reminders for water changes, filter cleaning, dosing or pruning
• Complete a task and it's logged to history; the next reminder reschedules itself

YOUR DATA IS YOURS
• No account, no sign-up, no cloud: everything lives on your phone
• Full CSV export, free forever
• We collect no data — literally none

FREE AND PAID, NO FINE PRINT
• Free: 1 tank, unlimited measurements, CSV export, 2 reminders, 30 days of trends
• Tankbook Lifetime ($9.99, ONE-TIME purchase): unlimited tanks, unlimited reminders and full trend history. No subscription, ever.

Freshwater first: made for community tanks, planted tanks, bettas and shrimp keepers. Missing a parameter? Tell us — the app grows with the community.

## Key features

- Log water parameters (pH, temp, ammonia, etc.)
- View parameter trends with healthy ranges
- Set maintenance reminders (water changes, dosing)
- Unlimited measurements in free version
- CSV data export
- No account or cloud storage required

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tankbook Lifetime | $9.99 | one-time |


## Is Tankbook safe?

Not enough ratings yet to assess Tankbook.

## Is Tankbook legit?

Tankbook: Aquarium Log has limited verification signals. The AppsHunter Legitimacy Score for Tankbook is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Frequently asked questions about Tankbook

### What are the limitations of the free version of Tankbook?

The free version of Tankbook allows for one tank, unlimited measurements, CSV export, two reminders, and 30 days of trend history. Additional features like unlimited tanks and full trend history require a one-time purchase.

### How does Tankbook handle user data privacy?

Tankbook prioritizes user privacy by not requiring an account or cloud storage. All data is stored locally on your device, and the app explicitly states that it collects no user data.

### What parameters can I log with Tankbook?

You can log key water parameters including pH, temperature, ammonia, nitrite, nitrate, GH, and KH. The app displays the last logged value as a reference for quick logging.

### Does Tankbook offer a subscription service?

No, Tankbook does not offer a subscription service. The premium features are unlocked with a one-time purchase of 'Tankbook Lifetime'.

### What devices is Tankbook compatible with?

Based on the provided data, Tankbook is currently supported on iPhones. Information regarding Android compatibility is not available.

### How often is Tankbook updated?

The app was last updated on August 25, 2026, with version 1.0. This indicates it is a new release, and future update frequency will depend on developer plans.

### What do users like most about Tankbook?

User sentiment data is limited with only one rating available. However, the description highlights features like fast logging, clear trends, and maintenance reminders as key benefits for fishkeepers.

### Is Tankbook suitable for beginners?

Yes, Tankbook is designed for fishkeepers and aims to be a reliable tool. Its straightforward logging and reminder system can be beneficial for both new and experienced aquarists.

## Version history (last 1 release)

### 1.0 — 2026-08-25

No release notes.

## Apps similar to Tankbook

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [AquaLog: Aquarium Water Log](https://appshunter.io/ios/app/aqualog-aquarium-water-log/id6812809566) | — | Free | Lifestyle |
| [TankDoc: AI Fish Doctor & Vet](https://appshunter.io/ios/app/tankdoc-ai-fish-doctor-and-vet/id6780123197) | — | Free | Lifestyle |
| [AquaLog: Aquarium Tank Tracker](https://appshunter.io/ios/app/aqualog-aquarium-tank-tracker/id6785401592) | — | Free | Lifestyle |
| [Aquarium Notebook: Breeding](https://appshunter.io/ios/app/aquarium-notebook-breeding/id6797798455) | — | Free | Lifestyle |
| [TankDiary: Aquarium Tracker](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172) | 5.0 (2) | Free | Lifestyle |
| [AquaSense.fish](https://appshunter.io/ios/app/aquasensefish/id6777320311) | 4.3 (3) | Free | Lifestyle |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-25.*