ReefDiary Guide
ReefDiary vs ReefBay: Which Reef Tank App Is Better in 2026?
ReefDiary and ReefBay both help saltwater hobbyists track reef tanks, but they emphasize different workflows. This comparison uses each product’s public listings.
ReefBay publicly describes a saltwater-focused app with parameter tracking, trend charts, maintenance reminders, tank profiles, community features, and a local marketplace for corals, fish, and equipment on iOS and Android. ReefDiary supports reef and freshwater tracking on web, iOS, and Android with dosing logs, reef intelligence, and optional Enterprise storefront workflows.
Keilo · Published · Last updated · Competitor details last checked
How ReefDiary compares
| Feature | ReefDiary | ReefBay |
|---|---|---|
| Pricing model | Free Starter tier, Serious Reefer subscription, and Enterprise. Live prices are on the signup and enterprise pages. | Free core tracking. DeepDive subscriptions were listed at $4.99, $29.99, and $39.99 (checked July 2026). |
| Parameter tracking | 30+ parameters, custom per-tank ranges, and 7, 30, and 90-day trend charts. | Core parameters and basic tracking. |
| ICP lab report import | PDF upload, AI parsing, and values synced into parameter history. | Not offered on the pages checked. |
| Dosing logs linked to parameters | Yes. Dosing entries sit on the same timeline as parameter history. | Yes. |
| Expense and budget tracking | Costs can create livestock or equipment records, with monthly and category budgets. | Not offered on the pages checked. |
| AI | Reef Intelligence and AI Chat read already-synced tank data. | AI-powered insights on paid DeepDive tiers. |
| Shop tools | Enterprise tier for staff, inventory, customer tanks, bookings, and POS connections. | Not offered. The marketplace is peer-to-peer, not shop inventory. |
| Platforms | Web, iOS, and Android. | iOS, iPad, Mac, and Android. |
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Common questions
Is ReefBay only for saltwater tanks?
ReefBay publicly positions itself for saltwater aquarium and reef hobbyists. ReefDiary supports reef tanks and broader freshwater aquarium types as well.
Does ReefDiary include a coral marketplace?
ReefDiary includes community features and Enterprise storefront tools for shops, but it does not publicly describe a peer marketplace like ReefBay’s local buy/sell focus.
Which app should a reef keeper choose?
Choose based on workflow. ReefBay may fit keepers who want marketplace and community features bundled with tracking. ReefDiary may fit keepers who want web/mobile tracking, dosing correlation, reef intelligence, and optional business tools.