Comparison

RMU2 Config vs ReefATLAS PAR Estimator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RMU2 Config

Features
Read full description

*** Requires a corTalk® RBT1 or RMU123PGM and RMU2 to use. *** Contact us at 'sales.rmu2@mobiltex.com' to purchase. This app is for configuring the corTalk® RMU2 (Remote Monitoring Unit 2) with a Bluetooth configuration interface. Both the RBT1 or RMU123PGM are compatible. They both function as a complete RMU2 programming interface but only requires the Bluetooth connection of your phone to use. The RMU2 is used to monitor a cathodic protection rectifier with accurate measurement of a wide variety of signals. This app allows access to diagnostic information on the RMU2 and setting up the configuration to meet the customer's needs. The app allows full configuration of the RMU2 including - slot measurement types - limits - slot scaling and offset - location Other features include the - viewing of readings and their limits - detailed status screen for troubleshooting - integrated manual - wiring diagrams for each measurement type The RBT1 and RMU123PGM is always in a Bluetooth pairing mode and requires a pairing code entered on the app. The pairing code (default=123456) can be found and changed with the app. Once paired, the iOS device can reconnect without needing to re-enter the code. The RBT1 pairing code can be reset by tapping the RBT1 5 times in 10 seconds with a user-supplied magnet.

About

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.

Highlights
  • 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
Features
Read full description

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

RMU2 Config4 screens
ReefATLAS PAR Estimator4 screens

Verdict

The call

The clearest difference is in-app purchases: RMU2 Config at none against ReefATLAS PAR Estimator's 1. ReefATLAS PAR Estimator's advantage is update cadence (daily vs every 3 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. ReefATLAS PAR Estimator sells 1 in-app purchase, starting at $4.99 per month. RMU2 Config asks for nothing beyond the download.

UpkeepUpdate frequency

RMU2 Config ships an update every 3 months, ReefATLAS PAR Estimator daily. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 7 level
RMU2 Config versus ReefATLAS PAR Estimator: the parameters behind the verdict, then further details
ParameterRMU2 ConfigReefATLAS PAR Estimator
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 monthsDaily — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size22 MB27 MB
Age rating4+4+
DeveloperMobiltex DataJONATHAN ALBERT PITTMAN

In-app purchases

None

RMU2 Config

No in-app purchases

1 purchases

ReefATLAS PAR Estimator

Subscriptions1
  • ReefATLAS PAR Estimator Monthly$4.991 Month

Questions

Is RMU2 Config free?
RMU2 Config is free to download, with no in-app purchases.
Is ReefATLAS PAR Estimator free?
ReefATLAS PAR Estimator is free to download, with in-app purchases available.
Do RMU2 Config or ReefATLAS PAR Estimator have ads?
Neither RMU2 Config nor ReefATLAS PAR Estimator shows ads.
Which is updated more often, RMU2 Config or ReefATLAS PAR Estimator?
RMU2 Config ships an update every 3 months, and ReefATLAS PAR Estimator daily. Most recently, RMU2 Config was updated on October 20, 2026 and ReefATLAS PAR Estimator on October 19, 2026.

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