Details for every biotope
Freshwater, marine or brackish aquarium, terrarium, paludarium and formicarium. Each with its own fields: water chemistry, climate, substrate, equipment.
Aquariums · terrariums · paludariums · formicariums
The field notebook for your aquarium
Details, inhabitants, care routine and water parameters. Everything your biotope needs, logged on your phone and in order. No account, no cloud.
Coming soon to Google Play.
- No sign-up
- Works offline
- Your data stays on your phone
9:41
Wednesday, November 11
3 due · 1 overdue
2/3 up to date
Up next
Water change
Reef · every 7 days
Overdue Done
Reef 60 L
Amazon
Today
Water change
Reef 60 L
Feed
Amazon aquarium
Next 7 days
Change filter
Tropical terrarium
Features
Fewer notebooks, more biotope
Six things done well, with no hidden menus. Everything you log today is still there tomorrow, because it lives on your phone.
Inhabitants by name
Plants and animals kept apart, with photo, size, diet or substrate. Add a newborn and it is logged with its arrival date.
Care routine, nothing forgotten
Recurring tasks with reminders: water changes, fertilising, filter cleaning. Tap done and the app works out the next date.
Parameters and charts
pH, KH, temperature, salinity and more. One series at a time, with its target band and a summary of average, trend and time in range.
Photo log
Write down what happens: a spawning, a new layout, the day the fish arrived. Every entry keeps its photo and notes.
Equipment, food and maths
Lights, filters and pumps with their wattage; foods and fertilisers. Plus dosing, CO₂ and water-change calculators.
Screenshots
What it looks like inside
No filler screens: tasks, details, inhabitants and readings, which is where you actually spend your time.
9:41
Wednesday, November 11
3 due · 1 overdue
2/3 up to date
Up next
Water change
Reef · every 7 days
Overdue Done
Reef 60 L
Amazon
Today
Water change
Reef 60 L
Feed
Amazon aquarium
Next 7 days
Change filter
Tropical terrarium
Your day, sorted
What comes next is always on top; the rest grouped into overdue, today and the coming days.
Aquarium
Reef 60 L
60 L · marine · since March
Inhabitants
2 animals · 4 plants
Equipment
Skimmer, light, pump
Feeding
2 products
Water change
Fri 13 · every 7 days
Details
Edit Water type Marine
Volume 60 L
Salinity 35 ppt
Water change 20 %/week
The whole biotope
Photo, details, inhabitants, equipment and feeding from a single screen.
9:41
Inhabitants
Living-room aquarium
Animals
Dwarf pufferfish
3 cm · since May
Galaxy rasbora
2 cm · 6 fish
+ Add animal
Plants
Anubias nana
On driftwood
Java moss
2 handfuls
+ Add plant
Saved
8 inhabitants · with photos and notes
Who lives there
Plants and animals listed separately, with photo, size and arrival date.
9:41
Readings
Reef 60 L
pH KH Temperature Salinity
8.2
Average
78 %
In target
Steady
Trend
Latest readings
pH 8.2 Today, 09:12
pH 8.0 Monday, 09:40
pH 8.3 Saturday, 10:05
pH 8.1 Friday, 08:55
Target band 8.1 – 8.4, taken from the details
+ Add reading
Numbers made clear
Every parameter with its chart, its target band and a clean summary.
Swipe to see all four
Log
New soft coral
Today · Reef 60 L
“Placed on the right-hand rock. Slightly lower light than the rest.”
Every entry with its photo and notes. It stays with the biotope.
Tools
Dosing
12.5 ml
100 L · 12.5 ml/100 L
Doses, estimated CO₂ and recommended water changes based on stocking.
Species & compatibility
Will they get along?
Biotopo includes more than 455 fish, plant, invertebrate and coral species, with their water ranges, adult size and minimum tank volume. As you type a name while adding an inhabitant, it suggests species for your tank’s water and shows their sheet; picking one fills in the scientific and common names.
And with one tap it analyses your biotope: it checks your inhabitants against your latest readings and flags anything that doesn’t fit.
- Water type
- Temperature, pH, GH and salinity
- Minimum volume
- Schooling
- Temperament
- Reef safety
- CO₂
Compatibility
Amazon
- Tiger barb may bother Neon tetra.
- Neon tetra: keep at least 6 (you have 4).
Species reference
Anubias
Anubias barteri
Plants20–28 °C · pH 6–8 · GH 2–12
25 cm · from 20 L
Slow grower; tie it to rock, do not bury the rhizome.
Privacy
Your data never leaves your phone
Biotopo has no servers: everything is stored on your device. You decide when to make a backup and where to keep it.
- No account
- No sign-up, no email, no password. Open it and go.
- Fully offline
- The whole app works without internet. Nothing travels to any server.
- Your backup, your file
- Export a .json with everything, photos included, and keep it wherever you like.
Pricing
Start free. Go Pro when you outgrow it.
The free version is a complete notebook with two biotopes. Pro adds room, statistics and formulas, with a one-off payment: no subscription and no fine print.
One-off payment, forever
- ✓ Free: two biotopes, the full notebook, photos and backups.
- ✓ Pro: unlimited biotopes, parameter statistics, calculators and compatibility analysis.
- ✓ No ads in Pro: the free version shows a single, discreet banner.
Your biotopes in your pocket
Log your first biotope today. Tomorrow you will know exactly what is due.
Google Play · coming soon
Want to try it earlier? jama@eker.es