An alarm before it is too late
Overheating, a water level drop, a leak under the cabinet, toxic NO2. A failing heater shows up in the trend before the temperature hits the limit. The alert reaches your phone, plus Telegram and Home Assistant.
Android app · free testing until the end of 2026
Your aquarium. Always at hand.
Live temperature, water level, pH and CO2 from your Raspberry Pi. Alarms on your phone, photo diagnosis and a plan for every problem. No cloud, no ads.
Testing phase: until the end of 2026 the app is in testing and available for free.
Coming soon to Google Play. How to get the app now
- No ads, no tracking
- Data stays at home
- Polish and English
- Android 7+
24/7sensors watched around the clock
15 minalarms checked in the background
11algae types with an action plan
0ads, cloud accounts and trackers
- Temperature
- pH
- CO2
- Water level
- Leak
- NO3
- PO4
- NO2
- KH & GH
- Algae atlas
- Fish diseases
- Water changes
- Fertilising
- Quarantine
- Home Assistant
- Telegram
- Monthly report
- CSV export
- Tuya smart plugs
- CO2 cut-off by pH
- Power metering
- Pet-sitter link
- Before/after experiment
- Maintenance mode
Features
Everything a healthy tank needs
The app connects to the monitor on your Raspberry Pi and turns sensor readings into clear advice.
Photo diagnosis
A local AI model recognises fish disease symptoms and algae. The photo never leaves your network.
Algae atlas
From diatoms to black beard: identify from a description and get a step-by-step removal plan.
Water tests with advice
NO3, PO4, NO2, KH, GH and pH in one place. The app tells you what to fix and by how much.
Water changes, never forgotten
Schedule, reminders, how much water and what it costs. Fertilising and maintenance too.
History and report
Charts for 30 days, 90 days and the whole year, a monthly report and CSV export saved straight to your phone.
Lights and CO2 on smart plugs
Tuya / Smart Life plugs switch lights and CO2 on a schedule, on your home network, without the cloud. Power and energy metering with cost, and CO2 cuts off by itself when pH drops too low.
Travel without worry
A pet-sitter link: readings, alarms with instructions and today's tasks, no login, read-only, with an expiry date. Maintenance mode silences alarms while you work in the tank.
Before/after experiment
New fertiliser or longer lighting? The app compares readings, tests, algae and alarms with the same period before the change and tells you what improved.
Home Assistant
Sensors appear automatically over MQTT. Automate lights and heater in one place.
Polish and English
Menus, notifications and the report in your language. Celsius or Fahrenheit, litres or gallons.
Screens
See it in action
Real app screens with sample data.
Get started
Three steps and you are done
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1
Monitor on a Raspberry Pi
Temperature, water level and pH sensors connected to a Raspberry Pi by the tank. Without sensors it still works as a journal.
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2
Install the app
From Google Play or from the APK file. It takes a few megabytes and needs no accounts.
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3
Enter the address and sign in
For example 192.168.1.50:5000 at home or your DuckDNS name away from home. The app checks the connection for you.
Download
How to get the app
Until the end of 2026 Aquarium Monitor is in testing and available for free. Install the app from a file on Android or request access and you will get a link and instructions.
Android file (APK)
Install without Google Play on a phone with Android 7 or newer.
- Download the file and open it from the notification or the Downloads folder.
- When the phone asks, allow your browser to install unknown apps.
- Install, open the app and enter your monitor's address.
Google Play Protect may warn about an unknown developer because the app is not from the store. Install a newer version the same way, over the old one; your settings stay.
We e-mail the APK: fill in the Request access form. You don't need a Raspberry Pi to install the app.
Request access
Want to join the testing or don't have a monitor yet? Leave your details and we will e-mail you the Android installation file and sensor wiring instructions.
Coming soon: we will start selling a ready kit with sensors for measuring water parameters: level, temperature and pH.
Your data stays at home
The app talks only to your Raspberry Pi. There is no cloud account, no ads, no analytics, and the AI model runs on your network.
Privacy policyFAQ
Frequently asked questions
Do I need a Raspberry Pi?
Yes. The app is a remote for the aquarium monitor that runs on a Raspberry Pi or another computer at home. That is where the sensors and your data live.
Does it work away from home?
Yes, if the monitor has a public address, for example via DuckDNS. We recommend HTTPS then, so your password is encrypted.
How much does it cost?
Until the end of 2026, during testing, the app is available for free. After that the app stays free and ad-free, while some monitor features, such as notifications, AI diagnosis and export, will need a Premium licence.
How do I install the app from the APK file?
Download the file to your phone and open it. Android will ask permission to install apps from your browser: allow it in the window that appears and go back to the installation. You can turn the permission off later in Settings → Apps → Special access → Install unknown apps.
How do I get access to the app?
Click Request access in the Download section. You will receive a link to the APK or a Google Play testing invite, plus instructions for setting up the monitor.
What about iPhone?
Open the monitor in Safari and choose Share → Add to Home Screen. Notifications on iPhone need an HTTPS address.
Which permissions does the app need?
Only internet (to reach your server) and notifications. You pick photos yourself, and the camera is opened by the system camera app.
Guides
Features and guides
Peace of mind, healthy fish
Install the app and keep an eye on your tank wherever you are.