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AquaAssist
Track water & cycle new tanks — free, offline, no signup
AquaAssist is a free aquarium tracker that goes beyond basic logging. It includes a guided nitrogen cycle assistant for new tanks, a species database with compatibility checks before you add new fish or plants, and a CO2 estimator for planted setups. It's a PWA that installs on both Android and iOS and works fully offline once loaded — no app store, no account, no sign-up. The only optional feature, cross-device sync, uses a short code instead of email or login.
AquaAssist is a free aquarium tracker I've been building for the past couple months.
What it does:
- Logs pH, temperature, ammonia, nitrite, nitrate, KH/GH with trend charts
- A guided nitrogen cycle assistant for new tanks — tracks the cycle and tells you when it's actually safe to add fish
- A species database with compatibility checks, so you get a warning before adding something that clashes with your current tankmates
- A CO2 estimator for planted tanks, from your pH/KH readings
- Water change & feeding reminders, support for multiple tanks, optional photo logs
Technical bits that might interest this crowd: it's a PWA, so it installs as a real app on both Android and iOS (via "Add to Home Screen" on iOS) — no app stores, no native codebase to maintain separately. Once loaded, it works fully offline. No account or login required; the only optional feature (cross-device sync) uses a short code instead of an email/password.
It's free, no ads, and I'm still actively improving it — would love feedback, especially from anyone who actually keeps fish or plants. What's missing, what's confusing, what would make this genuinely useful day to day?
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About AquaAssist on Product Hunt
“Track water & cycle new tanks — free, offline, no signup”
AquaAssist was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #157 on the daily leaderboard. AquaAssist is a free aquarium tracker that goes beyond basic logging. It includes a guided nitrogen cycle assistant for new tanks, a species database with compatibility checks before you add new fish or plants, and a CO2 estimator for planted setups. It's a PWA that installs on both Android and iOS and works fully offline once loaded — no app store, no account, no sign-up. The only optional feature, cross-device sync, uses a short code instead of email or login.
AquaAssist was featured in Web App (124.3k followers), Productivity (663.6k followers) and Pets (4.7k followers) on Product Hunt. Together, these topics include over 211.1k products, making this a competitive space to launch in.
Who hunted AquaAssist?
AquaAssist was hunted by Yoan Spasov. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Yoan Spasov