ReefCtrl vs ReefATLAS PAR Estimator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReefCtrl
Manage your reef aquarium with this intelligent platform. Monitor equipment, track water chemistry, and receive smart alerts. It integrates with Neptune Apex controllers and offers AI-powered assistance for hobbyists.
- Neptune Apex integration
- Smart alerts and notifications
- Water chemistry tracking
- Dosing management
- AI reef assistant
- Equipment and livestock management
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Take full control of your reef aquarium with ReefCtrl — the intelligent reef management platform built for serious hobbyists. NEPTUNE APEX INTEGRATION Sync your Apex controller automatically via apex fusion — no port forwarding or tunnels needed. Monitor all outlets live, toggle equipment with safety confirmations, and track power consumption in real time. SMART ALERTS Get push notifications the moment something needs attention — parameter spikes, Apex offline, maintenance due, or dosing containers running low. Dismiss with intelligent cooldowns so you only hear what matters. WATER CHEMISTRY TRACKING Log and chart Alkalinity, Calcium, Magnesium, pH, Salinity, Nitrate, Phosphate and more. Visualise 30-day trends. Import ICP lab results from Triton, ATI, or Fauna Marin with AI-powered analysis. DOSING MANAGEMENT Track Fauna Marin Balling, ESV B-Ionic, Red Sea Reef Foundation, Kalkwasser and more. Monitor Neptune DDR container levels live. Log doses with one tap — no typing required. AI REEF ASSISTANT Chat with AI about your tank. Generate Neptune Apex programming code in plain English. Get personalised recommendations based on your actual parameters. EQUIPMENT & LIVESTOCK Manage your full equipment list with maintenance schedules and reminders. Track your fish and coral with species-specific care notes. ReefCtrl works with or without a Neptune Apex. Start with manual parameter logging and add automation as you grow.
ReefATLAS PAR Estimator
This app helps reef aquarium enthusiasts estimate and visualize light distribution without a PAR meter. It allows users to input tank dimensions, lighting equipment, and water conditions to predict PAR levels and make informed decisions about coral placement and lighting setups. The tool offers interactive 3D visualizations and supports a wide range of popular reef lighting systems.
- Interactive 3D PAR heatmap visualization
- Support for popular reef aquarium lighting systems
- Multi-fixture light array setup
- Fixture placement and angle controls
- Spectrum and intensity adjustment tools
- Custom tank dimension configuration
- Surface agitation and lid modeling
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ReefATLAS PAR Estimator is a subscription-based aquarium lighting analysis app built for reef keepers who want a smarter way to estimate light levels without always having access to a PAR meter. Designed for reef aquarium hobbyists and professionals, ReefATLAS PAR Estimator helps predict and visualize PAR distribution using tank dimensions, lighting equipment, mounting height, spectrum settings, fixture intensity, water conditions, lid transmission, surface agitation, and other key variables. The goal is simple: help reef keepers make better lighting and coral placement decisions before guessing, moving coral blindly, or copying someone else’s lighting schedule from a different setup. FEATURES • Interactive 3D PAR heatmap visualization • Support for popular reef aquarium lighting systems • Multi-fixture light array setup • Fixture placement using a top-down tank layout • Support for mixed light models in the same setup • Individual fixture height, position, rotation, and angle controls • Master/slave light grouping for linked fixtures • Spectrum and intensity adjustment tools • Manufacturer-style spectrum presets where available • Custom tank dimension configuration • Manufactured tank catalog support • Glass thickness and internal dimension calculations • Surface agitation / shimmer adjustment • Lid type and lid cleanliness modeling • Salinity-aware estimate adjustment • Project save and load functionality • Local device-based project storage • Optimized for reef aquarium planning and coral placement SUPPORTED LIGHTS ReefATLAS PAR Estimator includes modeled profiles for many popular reef lights, including AquaIllumination, EcoTech Marine, Kessil, Red Sea, ReefBreeders, Maxspect, Fluval, Illumagic, REEFi, Orphek, Philips CoralCare, NavaReef, Noo-Psyche, GHL, Current USA, and more. View the current supported light list here: https://thereefatlas.com/par-estimator-lights New lights and tanks are added regularly. If your light or tank is not listed, the app includes request buttons so you can send it in for review. Requested lights are prioritized for modeling when enough manufacturer/spec/PAR reference data is available. HOW IT WORKS Configure your aquarium dimensions, select your lighting equipment, adjust fixture placement, mounting height, spectrum, intensity, water conditions, and lid settings, then generate a 3D PAR distribution estimate throughout the aquarium. For single-light setups, quickly model one fixture over your tank. For advanced systems, the Light Setup tool lets you place multiple fixtures across a top-down tank grid, including mixed models, different mounting heights, fixture rotation, and angled mounting. The estimator calculates each fixture’s contribution at each point in the aquarium and combines overlapping light output to create the final PAR estimate. This helps represent real-world multi-light setups where beams overlap, spread, and converge across the tank. IMPORTANT ACCURACY NOTE ReefATLAS PAR Estimator is an estimation tool. A real PAR meter will always be the most accurate option for measuring your specific tank. However, many reef keepers do not have access to a PAR meter. This app is designed to provide a better starting point than guessing by combining modeled light profiles, tank dimensions, fixture placement, spectrum settings, mounting height, water depth, lid transmission, salinity, and surface agitation into one interactive estimate. Accuracy depends on available fixture data, setup inputs, and real-world variables such as rockwork, coral shading, water clarity, lens condition, and surface movement. SUBSCRIPTION REQUIRED ReefATLAS PAR Estimator requires an active monthly subscription to access and use the app. A subscription purchase is required to use the PAR estimation tools and features shown in the App Store screenshots and description. Privacy Policy: https://thereefatlas.com/privacy Terms of Use: https://thereefatlas.com/terms
Screenshots
Verdict
The clearest difference is in-app purchases: ReefCtrl at none against ReefATLAS PAR Estimator's 1. ReefATLAS PAR Estimator's advantage is update cadence (daily vs every 9 days). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ReefATLAS PAR Estimator sells 1 in-app purchase, starting at $4.99 per month. ReefCtrl asks for nothing beyond the download.
ReefCtrl ships an update every 9 days, ReefATLAS PAR Estimator daily. The most recent releases landed on September 3, 2026 and July 9, 2026 respectively.
| Parameter | ReefCtrl | ReefATLAS PAR Estimator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 9 days | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 3 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Jayanth Vignesh Ramachandran | JONATHAN ALBERT PITTMAN |
Customer experience
ReefCtrl
ReefATLAS PAR Estimator
In-app purchases
ReefCtrl
No in-app purchases
ReefATLAS PAR Estimator
- ReefATLAS PAR Estimator Monthly$4.991 Month





