Shoal & Stem

Scan test kits. Score tanks.

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Finn just leveled up — personalized health insights for your tank, a new community feed, on-demand species requests, and stocking history you can edit. Shoal & Stem is the freshwater aquarium journal hobbyists actually use. Whether you're keeping your first betta or running a high‑tech planted scape, Shoal & Stem helps you stay on top of your tanks — without spreadsheets. SNAP, SCORE, AND LOG YOUR TANKS • Scan test kits with your camera. The AI reads your parameter pads in seconds — pH, ammonia, nitrite, nitrate, GH/KH, phosphate, even copper and iron — so you're not typing numbers by hand. • Score your tank's health. Get an at‑a‑glance number across factors like stocking, water quality, equipment, maintenance, plant cover, and ecosystem maturity. • Track water changes. Log volumes, get reminders, and see how consistent you've been. • Photo journal. Document your scape over time with notes and dated photos — snap a full‑tank shot straight from the camera, and rotate any shot with a tap. • Archive retired tanks. Break down a scape without losing it — archived tanks keep their full journal, photos, and history. ASK FINN ANYTHING Finn is your AI aquascaping companion — versed in aquarium care, plant biology, fish compatibility, water chemistry, and aquascaping technique. Finn looks at your real water readings — now including copper and iron, so it can flag copper that's risky for shrimp and snails — and answers anything from "why is my plant melting?" to "what fish can I add to my 20 gallon?" PLAN YOUR STOCKING The Stocking Calculator tells you if your tank is overstocked. Pick species, check compatibility, get a balanced bioload number, factor in your water‑change routine, and let Finn weigh in on your plan. CONNECT WITH OTHER SCAPERS • Browse community tanks and see each keeper's fish, shrimp, and plants up close • Inspire (heart) tanks you love • Comment, follow, and chat • Forum for deep‑dive aquascaping discussions WHAT'S FREE Everything. The app is free with unlimited tanks. No subscription. No paywall on core features. PRIVACY‑FIRST We don't sell your data, share with advertisers, or run third‑party analytics SDKs. See our privacy policy at shoalandstem.com/privacy. Questions? Email hello@shoalandstem.com or visit shoalandstem.com.

  • 4.8
    out of 5
    4 Ratings

This update puts Finn — your aquarium sidekick — front and center, plus a lot you've asked for. Smarter Finn • Personalized tank-health summaries — Finn reads your own logs and tells you what's really going on, not a one-size-fits-all line. • Just tell Finn what you did — "did a 25% water change," "lost a tetra" — and he logs it for you, no forms. • New Updates inbox — announcements and notes from Finn, all in one place. • Rate Finn's answers with a thumbs up or down so they keep getting sharper. Stocking you control • Edit a fish's stocking history — fix a "died" that should've been "rehomed," or undo your most recent entry. • Tap any history entry to jump straight to that species. • Remove a logged water change right from the schedule. Discover and community • A new Discover feed — fresh tanks, journal highlights, and what the community is up to. • Public profiles, plus followers and following. • Can't find a species? Request it and we'll add it — and the catalogue just grew by a lot. Polish • Smoother camera and faster photo uploads. • Dozens of small refinements throughout. A lot of this came straight from your suggestions — keep them coming.

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 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
  • 57.1 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
4+
Copyright
  • © 2026 Shoal and Stem LLC