Every reef tank generates the same scattered mess of data eventually: parameter readings in one place, dosing notes somewhere else, an ICP report sitting in an email attachment nobody re-opens, livestock and equipment costs nowhere at all. Most reefers piece together two or three tools to cover it, because most reef apps are built to do one or two of those things well rather than all of them together. That gap is the reason ReefDiary exists.
Quick answer: the reef tracking apps reefers reach for most in 2026 Reef Trak, Aquarimate, NextUpReef, and ReefBay each do a few things very well, but they're built around different priorities (marketplace, AI chat, native desktop apps, budget pricing). None of them connect parameters, dosing, livestock, equipment, and shop-level data in one place the way ReefDiary does. Here's how they actually stack up, feature by feature.
Quick comparison
| Category | ReefDiary | Reef Trak | Aquarimate | NextUpReef | ReefBay |
|---|---|---|---|---|---|
| Pricing model | Free tier, Pro subscription, Enterprise/shop tier | Free + $9.99 one-time lifetime unlock | One-time purchase + $9.99/yr for cloud sync | Free + $4.99/mo or $39.99/yr Pro | Free + DeepDive subs ($4.99 / $29.99 / $39.99) |
| Parameter tracking | 30+ parameters incl. trace elements, custom per-tank ranges, 7/30/90-day trend charts | 55+ parameters incl. trace elements | Solid core coverage with trend graphs | 10 parameters (free), Reef Score and Stability Score | Core parameters, basic tracking |
| ICP lab report import | PDF upload, AI parsing, auto-sync into parameter history | 7 lab brands, read-only import | Not offered | Not offered | Not offered |
| Dosing logs linked to parameters | Yes | Yes | Yes | Not a dedicated feature | Yes |
| Expense / budget tracking | Costs linked to specific livestock/equipment, monthly + per-category budgets | Expense tracking + Receipt Scan Assist | Expense tracking only | Not offered | Not offered |
| AI features | Reef Intelligence + AI Chat, works directly against synced tank data | TrakAI: exports your data, paste into any AI engine | None | Reef AI Advisor + AI photo test-kit logging (Pro tier) | AI-powered insights (paid DeepDive tiers) |
| Shop / business tools | Full Enterprise tier: staff, inventory, customer tanks, bookings, POS integrations | Not offered | Not offered | Not offered | Not offered (marketplace is peer-to-peer) |
| Platforms | Web + iOS + Android, synced | iOS, Android, Web Portal | iOS, Android, macOS, Windows | iOS, Android (no web portal) | iOS, iPad, Mac, Android |
What actually matters in a reef tracking app
Before comparing apps feature-by-feature, it's worth being honest about what a reef tank app is actually for. It's not a scoreboard. It's the thing that has to still make sense when you're trying to figure out, eighteen months from now, why a tank colored up right after a salt mix change. That means three things matter more than a pretty dashboard: whether the data types actually connect to each other, whether the app will still be around and maintained in a few years, and whether the pricing model survives the multi-year life of an actual reef tank.
Reef Trak broad feature set, one-time pricing, but pieced together from imports
Reef Trak covers a lot of ground: 55+ parameters, dosing logs, a livestock catalog, equipment tracking, and read-only imports from controllers like Apex Fusion and HYDROS. Its standout feature is TrakAI, which exports tank history as a document you paste into whatever AI chatbot you already use, rather than locking you into one AI vendor. Pricing is a one-time $9.99 unlock rather than a subscription, which is a real advantage for a hobby where tanks run for years.
Where it's thinner: TrakAI's bring-your-own-AI approach means the analysis only happens when someone remembers to export and paste it somewhere it's not sitting on the dashboard flagging that something's drifting. There's also no built-in shop or business layer, so anyone running a coral farm or a local fish store alongside a personal tank isn't covered.
Aquarimate the most native apps, the least connected AI
Aquarimate has been around the longest of this group and it shows in platform coverage dedicated apps for iOS, Android, macOS, and Windows, which none of the newer entrants match. Parameters, tasks, dosing, expenses, and a livestock database (Aquaribase) are all solidly built. It's a one-time purchase plus an optional $9.99/year subscription for cloud sync between devices.
The trade-off is that Aquarimate has no AI features at all, and development has visibly slowed compared to the newer apps in this list. For someone who just wants a reliable native log with no bells and whistles, that's not necessarily a downside but it also won't help interpret why alkalinity keeps swinging.
NextUpReef genuinely useful free AI, but reef-only and mobile-only
NextUpReef's pitch is a strong free tier: ten parameters with color feedback as you type, a Reef Score and Stability Score, and tank-type-aware default ranges (SPS, LPS, mixed reef, nano, and so on). The Pro tier ($4.99/mo or $39.99/yr) adds an AI advisor that reads full parameter, equipment, and dosing history and gives prioritized recommendations, plus AI photo logging that reads a test kit color card from a picture.
It's a well-built app for what it does, but it's mobile-only (iOS and Android, no web portal) and scoped to the tracking-and-AI-advice use case specifically. There's no equipment maintenance scheduling depth, no expense/budget tracking, and nothing for anyone running more than a personal tank.
ReefBay the marketplace app first, tracker second
ReefBay's real strength is the peer-to-peer side: a coral and livestock marketplace with an active community, reportedly around 10,000 reefers and 30+ vendor partnerships. For anyone buying and selling frags through the app, that's genuinely useful and none of the others in this list match it. Parameter tracking is present but comparatively basic, and the deeper analytics sit behind tiered DeepDive subscriptions ($4.99, $29.99, or $39.99).
For reefers whose primary need is logging and understanding their own tank rather than shopping the marketplace, ReefBay's tracking depth is the weakest of the four.
Where ReefDiary fits
ReefDiary tracks the same core categories as the apps above parameters (30+ including trace elements, with custom per-tank ranges and 7/30/90-day trend charts), dosing logs linked to those parameters, livestock, and equipment maintenance but the difference shows up in what's connected to what. ICP lab reports (Triton, ATI, Fauna Marin, ICP-Analysis) get uploaded as PDFs and parsed automatically, with the extracted values synced directly into parameter history instead of living in a separate document. Water changes log before/after parameter snapshots so the effect of a change is visible, not just that one happened. Expense tracking ties costs to specific livestock or equipment line items, with monthly and per-category budgets, which none of the four apps above offer at that depth.
The other difference is scope. ReefDiary has a full Enterprise/shop tier underneath the personal-tank tools staff management, SKU-based inventory, customer tank tracking, service booking, and POS integrations (Vend, Square, Shopify, Lightspeed) for anyone running a coral farm or LFS, not just a home tank. None of Reef Trak, Aquarimate, NextUpReef, or ReefBay are built to scale that direction; they're all personal-hobbyist tools, full stop.
There's a real conversation to be had about AI approach specifically Reef Trak's TrakAI export and NextUpReef's Pro advisor are both legitimate, thoughtful takes on the problem, just different ones than ReefDiary's Reef Intelligence and AI Chat, which work directly against live, already-synced tank data rather than requiring a separate export step or being scoped to parameters alone.
The bottom line: reef problems don't respect app boundaries. A calcium crash is a parameter problem, a dosing problem, and sometimes a livestock problem all at once. The value of keeping everything in one connected system isn't that any single screen looks nicer it's that when something goes sideways in the tank, the answer is usually sitting across three or four different data types, lined up on the same timeline, without anyone having to do the math by hand.