Shoal & Stem: Fish Tank Log

Aquarium Intelligence

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Aquarium intelligence for your tanks: Finn reads your water tests, tap water and journal, scores each tank's health, and suggests what to do next. Shoal & Stem is aquarium intelligence built on a fish tank log. Finn, an AI sidekick, reads your tanks, water tests and journal, scores each tank's health, and suggests what to do next. A JOURNAL FOR EVERY TANK Log each tank with photos and short video clips, from the first fill to a grown-in scape. Track your fish, shrimp, snails and plants, mark the moments that matter, and keep any tank public or private. Put your tanks, and each tank's photos and clips, in the order you want. FINN, YOUR AQUARIUM SIDEKICK Ask Finn anything about fishkeeping and aquascaping. Finn reads your tanks, your water tests and your journal, so its answers fit your setup, and it checks the species it suggests against our catalog. Tell Finn what you did, like "did a 25% water change and added three otos", and it logs it for you. A HEALTH SCORE FOR EACH TANK Finn scores each tank across 7 factors, from stocking and water quality to maintenance, and explains what's behind the number. WATER TESTS AND YOUR TAP WATER Log readings by hand or scan a test strip with your camera, in ppm or degrees for GH and KH. See your city's tap water on My Tanks: chlorine or chloramine, ammonia, nitrate, copper, GH, KH and pH, compiled from public records. Save your own tap test as a tank's Source Water and Finn goes by your numbers. MAINTENANCE THAT KEEPS UP Schedules for water changes, dosing, feeding, tests and filter cleaning, with reminders. Pause a schedule, skip a day, name a food for each feeding day, and log partial water changes that count toward your target. SPECIES AND COMPATIBILITY A catalog of fish, shrimp, snails and plants with care ranges, tank mates and photos from the community. A COMMUNITY OF KEEPERS Follow tanks, react to journal entries, comment, and talk shop in the Tank Room. Read The Current, data stories from Finn built on public records. ON YOUR PHONE AND THE WEB Your tanks are the same in the app and at shoalandstem.com.

  • 4.9
    out of 5
    9 Ratings

ARRANGE YOUR TANKS Tap Arrange on My Tanks and put your tanks in your own order: hold and drag, or use the arrows. Your profile shows them the same way, here and on the website. New tanks start at the top. PHOTOS AND VIDEOS IN ONE LIST Drag a tank's photos and clips into the order you want. The first photo is the cover. Back to newest first puts them back. FASTER PHOTOS Photos load faster, full-screen photos open right away, and a clip shows its still while it starts. Uploads go two at a time and retry when the connection drops, and a journal photo that fails to upload is no longer dropped. FINN The chat opens on your newest message. Finn now checks the species it suggests against our catalog for your tank, knows today's date, and knows when your next water change is due. MORE Every aquatic plant now asks for a planting density, including plants you added before. The tap water card on My Tanks is one compact row. A private tank shows how to make it public. Journal entries keep their line breaks and "&" from the website.

The developer, Shoal and Stem, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Shoal and Stem LLC
Size
58.8 MB
Category
Lifestyle
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
13+
  • 13+
  • Contains
    User-Generated Content
    Social Media
Copyright
© 2026 Shoal and Stem LLC