One Fish Two Fish
An iPhone and iPad app for freshwater aquarium keepers, plus the launch website that introduces it.

At a glance
freshwater tank profiles built in
accounts, adverts or tracking
email at launch, nothing else
Challenge
The brief
Water test kits give you numbers but don’t tell you what they mean for your tank. The aim was an app that reads a test the way an experienced fishkeeper would and says plainly what needs doing, plus a website that explains it clearly ahead of launch.
Project details
- Client
- One Fish Two Fish
- Location
- App Store (coming soon)
- Sector
- iPhone & iPad app
- What I did
- App design & development, Website Design, Web Development
- Built with
- Native iPhone and iPad app, with a hand-coded static website
- Live site
- www.onefishtwofish.app
The approach
What I designed and built
Water tests entered by colour, using sliders that match liquid test kit colours
Ammonia graded on the toxic fraction worked out from the same test’s pH and temperature
A tank diary for water changes, feeding, dosing and livestock, with reminders based on your own history
Private by design: no account, no analytics, works with no signal and keeps data on the device
A single-page launch site with a live app preview and a one-email “tell me when it launches” sign-up
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