# Aquarium Log - Tank Manager — Simple Aquarium Journal App

> Aquarium management and monitoring journal for aquarists. (iPhone/iPad app by Ko Hyunshik.)

- Source: https://appshunter.io/ios/app/aquarium-log-tank-manager/id1621042664 (this page in markdown: same URL + `.md`)
- Developer: [Ko Hyunshik](https://appshunter.io/developer/1420039143)
- Category: Productivity, Utilities
- Price: Free with in-app purchases (on sale, was $7.99)
- Rating: 4.90/5 from 260 App Store ratings · 110 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 78 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, European Spanish
- Released: 2022-12-13
- Data updated: 2026-08-20
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/aquarium-log-tank-manager/id1621042664/reviews.md

## What is Aquarium Log?

Aquarium Log is a powerful mobile app designed for aquarists of all levels—whether you’re a hobbyist or a professional. Effortlessly maintain and monitor your tanks with intuitive features that keep everything organized and accessible.

Features

• Calendar View: Organize all your notes and tasks by date, so you never miss a thing.
• Unlimited Aquariums: Manage as many tanks as you want with ease.
• Record Measurements & Export as CSV: Log water parameters and easily export them to CSV files for deeper analysis.
• Multiple Timers for Precision Tests: Use multiple stopwatches to accurately time your water tests and other tasks.
• Feed View of Your Activities: Easily track what you did and when with an organized feed of your activities.
• Detailed Graphs: Analyze your tank parameters and trends using responsive, touch-enabled graphs.
• Photo Gallery with Custom Tags: Tag photos of your aquatic life and sort them using custom tags for easy browsing.
• Tank Albums: Create and manage photo albums for individual tanks.
• Cloud Backup & Restore: Securely back up your data to the cloud and restore it whenever needed.

Stay on top of your aquarium management with Aquarium Log, making it easier than ever to understand your tank’s history and improve your aquatic environment.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Calendar view for notes and tasks
- Unlimited aquarium management
- Record and export water parameters
- Multiple timers for precision tests
- Activity feed for tracking tasks
- Detailed graphs for parameter analysis
- Photo gallery with custom tags
- Cloud backup and restore

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Aquarium Log Premium (Monthly) | $3.99 | per month |
| Aquarium Log Premium (Yearly) | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tip Level 1 | $0.99 | one-time |
| Tip Level 2 | $2.99 | one-time |
| Tip Level 3 | $7.99 | one-time |
| Remove Ads - Special Discount | $1.99 | one-time |
| Remove Ads | $9.99 | one-time |


## What do users think of Aquarium Log?

Overall sentiment: positive

**Pros**

- 👍 Helpful for tracking tank parameters and maintenance
- 🚀 Customizable and flexible
- 💡 Integrated community and Q&A
- 🗓️ Useful reminders and scheduling
- 📊 Helpful graphs and data visualization

**Cons**

- 🐛 Occasional bugs and issues with data saving
- 📢 Ads can be intrusive
- 🤔 Unintuitive user interface in some areas
- 🔍 Limited database of fish, plants, and invertebrates

**Commonly reported bugs**

- Backspace issue when entering measurements
- Inability to access settings after tapping Subscriptions menu
- Temperature unit not remembered during setup

**Most requested features**

- Add ability to track fish age and lifespan
- Improve task scheduling and history view
- Allow more customization of parameter graphs
- Expand database of aquatic species

## Recent user reviews (10 of 110)

All indexed reviews: https://appshunter.io/ios/app/aquarium-log-tank-manager/id1621042664/reviews.md

### 3/5 — Could be better

*2026-07-19, version 0.3.21*

Would love to rate five stars but it appears to be lacking the ability for iCloud backup so if you run on an iPhone and iPad you will have to enter everything twice.

### 5/5 — 좋아요

*2026-07-10*

전반적으로 좋아요. 다만 캘린더에서 날짜 선택이 쉬웠으면 좋겠어요. 기존에 운영하던 수조 과거 데이터를 입력하고 싶은데 연, 월 이동이 불편하네요. 매일매일 일기쓰듯 기록하기엔 딱좋네요

### 5/5 — I love this app

*2026-06-11, version 0.3.17*

This is the perfect app to keep track of all of my fish, my livestock and my vertebrates. 
There’s some ads, but they’re not very often so I’m happy about it
I don’t mind watching ads if it’s not as often
You can also post pictures of your fish and look at pictures of other people’s fish
The app also helps me keep track of my water parameters

### 5/5 — I LOVE THIS APP

*2026-04-18*

This app has made it so much easier to plan out and make my tanks. I absolutely LOVE the Q$A feature and the the community posts. The only thing that I midly dislike is the learning curve it is a bit complicated for someone who just bought the app, but other than that this app is the best one I’ve been able to find

### 1/5 — It’s okay

*2026-02-02*

I like this app due to the community but some people keep commenting on my posts and others so much because they are experts. Some people like myself do not want “experts” coming at us as beginners and making arguments and claims. Some people do not respect others on here and keep jabbing us for our fish keeping practices. With each app that has people, the haters and rude people will always be there. For me I have experienced more than 4 annoying people each time I post it feels like coming at me telling me I don’t know what I’m doing in certain ways and I must follow their rules. The block function doesn’t work properly please get it fixed. I have 0 time to keep defending my ground. I like this app but people need to leave others and me alone when asked the first time.

### 5/5 — Awesome App!

*2026-01-22, version 0.3.4*

Does everything I would expect the app to do. Keeps track of everything! Highly recommend.

### 5/5 — Tired of 4 different calendars. Decided to try an app!

*2025-12-30*

ETA: Wrote my review... two seconds later found the "diary" icon! Noooo! Okay. 5 stars, my bad! Its hard to see, but it's there! 

Original:

Just set all my tanks into the app today. (Dec 29, 25) Absolutely lovely settings and options available. Asks for dates and inhabitants, plus styles of equipment. Fresh or salt water. Lots to work with! 

For reference, I have 12 tanks going and have paper calendars in each room that has tanks, just to take notes on what was done and how. Been running most of them for over a year & have a few that are two years old. (Thankful I labeled my startup dates on the tanks themselves. Super cool to see the exact ages of the tanks on the app!)

Wanted to try something new and get rid of all my calendars everywhere. 

I love everything so far, except one thing:

There isn't a "notes" option in the calendar mode. 😭

Now, it really wouldn't matter with just a few tanks. Or with someone who isn't as obsessive as I am. I get that. 

But, for those of us who need the extra note space, adding such an option to the daily calendar side would be amazing. 

This app nails most all of it (far as I can tell with a freshwater in tank settings, no idea for marine, as I am not there yet. I can bet it's just as thorough there, though.)

Thats literally my only complaint thus far. I love to write notes on how or what I did to my tanks *very* specifically. (Needs at least a 250 character limit or so.)

I will continue to use this app for a month or two, see if there is something I am missing or need to learn. (Will come back and update if something new pops up.)

Overall, great app. Has most everything. Found the creator comment on reddit when I looked up good apps for keeping track. 

Was not disappointed.

### 4/5 — Decent app.

*2025-12-13*

I really like this app. My only problem with it is that there is so few people on the app and most of them are from other country’s, not that there’s anything wrong with that it’s just most of there posts are in different languages.. I do like it how it lets you translate posts in other languages though.

### 5/5 — A great tank management app!!!

*2025-12-05*

This app has everything you’d need to organize and keep track of maintenance on multiple fish tanks! With customizable tasks for each tank, optional notifications, customizable data collection for water parameters, and a perfectly simple calendar to keep track of necessary tank needs! 

I’m new to owning a tank, and I started off big with a 50 gallon tank! This app made everything much simpler for me to understand, and way less daunting! Along with the other features I mentioned, you can also add and track breeds of fish in each tank! There is also an optional social section of the app where you can post information for your tank or see what other users are doing in their tanks too!

I love this app very much! My ONLY gripe with the app is I wish notifications had the badge on the iPhone Home Screen, and that notifications could be labled as “Time Sensitive” so they are displayed over other less important notifications on my phone. (As of December 2025 this is not an option)

Keep it up! I love this app very much!!

### 5/5 — 어항관리 어플중에 젤 좋음

*2025-12-01*

언제 머했는지 다 알수있어 좋음

## Frequently asked questions about Aquarium Log

### What does Aquarium Log do?

Aquarium Log is a mobile application designed to help aquarists manage and monitor their fish tanks. It provides tools for organizing notes, tracking water parameters, logging activities, and managing photos of aquatic life, making it easier to maintain a healthy aquarium environment.

### What are the key features of Aquarium Log?

Key features include a calendar view for organizing tasks, the ability to manage unlimited aquariums, recording and exporting water parameters as CSV, multiple timers for precision tests, a feed to view activities, detailed graphs for analyzing trends, a photo gallery with custom tags, tank albums, and cloud backup and restore functionality.

### How much does Aquarium Log cost?

The app is free to download and use, but it offers in-app purchases. This means you can access basic functionalities for free, with the option to purchase additional features or unlock premium content.

### What kind of aquariums can I manage with this app?

The app allows you to manage an unlimited number of aquariums, regardless of their size or type. Whether you have a small freshwater tank or a large saltwater reef, you can use the app to keep track of all your aquatic environments.

### Can I export my data from Aquarium Log?

Yes, you can export your recorded water parameters as CSV files. This feature is useful for deeper analysis of your tank's water quality and trends over time, allowing you to share or further process your data on a computer.

## Version history (last 5 releases)

### 0.3.23 — 2026-07-25

[0.3.23]
Fixed video crash bugs

### 0.3.21 — 2026-07-10

[0.3.21]
Bug fixes and stability improvements.

### 0.3.20 — 2026-07-03

[0.3.20]
Bug fixes and stability improvements.

### 0.3.17 — 2026-02-27

v0.3.16
Bug fixes and stability improvements for a smoother experience.

### 0.3.4 — 2025-11-09

v0.3.4
 The app now launches much faster! We've made significant performance improvements to reduce boot time.

## Apps similar to Aquarium Log

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Aquarium Tracker: Tank Manager](https://appshunter.io/ios/app/aquarium-tracker-tank-manager/id6755304265) | 4.5 (2) | Free | Productivity |
| [AQL - Aquarium Log](https://appshunter.io/ios/app/aql-aquarium-log/id6445925942) | — | Free | Productivity |
| [Reefability](https://appshunter.io/ios/app/reefability/id6636472070) | 2.7 (26) | Free | Productivity |
| [AquaCalculator](https://appshunter.io/ios/app/aquacalculator/id1449511522) | 3.7 (12) | Free | Productivity |
| [Apex Fusion](https://appshunter.io/ios/app/apex-fusion/id1114191823) | 3.4 (124) | Free | Productivity |
| [Aquarimate](https://appshunter.io/ios/app/aquarimate/id587215055) | 4.4 (625) | $9.99 | Productivity |

## More apps by Ko Hyunshik

- [ZenFocus: Focus,Binaural beats](https://appshunter.io/ios/app/zenfocus-focusbinaural-beats/id1673612152)
- [Noisescape: Sound Therapy](https://appshunter.io/ios/app/noisescape-sound-therapy/id6446680430)
- [Voice Pacer - Interval timer](https://appshunter.io/ios/app/voice-pacer-interval-timer/id6468228663)

All apps by Ko Hyunshik: https://appshunter.io/developer/1420039143

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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 2026-08-20.*