Comparison

Hydrawise vs Rinnai Central

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

Head to head
About

Hydrawise

Optimize your irrigation with intelligent, weather-based watering schedules. This app helps conserve water while ensuring your landscape stays lush and healthy. Manage your system remotely for ultimate convenience and efficiency.

Highlights
  • Predictive Watering based on weather
  • Optimized water usage
  • Remote irrigation system management
  • Enhanced local weather insights
  • Lush landscape maintenance
Read full description

Elevate Your Irrigation Experience with Hydrawise! Discover the ultimate in irrigation control with the Hydrawise App. Harness the power of Predictive Watering™, fueled by local weather data, to optimise water usage and enhance your landscape's vitality. Key Features: Predictive Watering: Let advanced algorithms adjust schedules based on local weather forecasts, saving water and promoting a thriving landscape. Improved Local Weather Insights: Dive into weather data with enhanced icons and descriptors that make it easier to understand the forecast's impact on your irrigation schedule. Maximise Water Savings: Hydrawise intelligently adapts watering schedules, conserving water without compromising landscape health. Lush Landscapes: Create an environment of beauty and sustainability by tailoring irrigation to your landscape's unique needs. Stay Connected: Never lose touch with your irrigation system — manage it remotely and with ease. Experience the Future of Irrigation: Hydrawise empowers you to take command of your irrigation system like never before. • Embrace the power of Predictive Watering, seamlessly integrating local weather data to optimise water usage. • Cultivate a landscape that flourishes while saving water and effort. • Stay in touch with your irrigation, from anywhere, anytime. Download the app now and embark on a journey to transform your landscape into a masterpiece of efficiency and beauty!

About

Rinnai Central

This app provides homeowners with convenient control over compatible Rinnai water heating systems, allowing temperature adjustments, scheduling, and maintenance alerts. Professionals can use it to register products, access service tools, and manage customer devices.

Highlights
  • Remote temperature control
  • Hot water scheduling
  • System status monitoring
  • Maintenance alerts
  • Product registration
  • Access service tools
  • Find local installers
Features
Read full description

Rinnai Central helps professionals support customers and gives homeowners convenient control of compatible Rinnai water heating systems from anywhere. For Rinnai PROs and installers, Rinnai Central makes it easier to register products, set up compatible customer devices, access service tools, and stay connected to Rinnai resources. For Rinnai tankless water heater owners, Rinnai Central provides convenient access to temperature control, recirculation settings, scheduling, system status, and maintenance alerts when supported by the connected product. PROFESSIONALS Use Rinnai Central to: ∙ Set parameters and perform service on compatible Rinnai tankless water heaters and boilers. ∙ Register eligible Rinnai products after installation. ∙ Set up and configure compatible customer Wi-Fi modules. ∙ Access product documentation, troubleshooting tools, training, rebates, news, and service resources. ∙ Find the right Rinnai product for your customer's needs. ∙ Access the Rinnai parts webstore. ∙ Manage your professional account and company relationship. ∙ Participate in eligible Rinnai PRO Tech programs when available. HOMEOWNERS Use Rinnai Central to: ∙ Adjust compatible water heating system temperature settings. ∙ Activate recirculation when supported by the product. ∙ Create daily schedules so hot water is ready when needed. ∙ Set vacation mode to help save energy when hot water is not needed. ∙ View real-time system status and maintenance alerts. ∙ Find experienced Rinnai PROs and installers near you. COMPATIBLE PRODUCTS Rinnai Central supports select Rinnai residential and commercial tankless water heaters and compatible accessories. Some features require a supported Rinnai Wi-Fi module or compatible connected product. Product availability, supported features, and access permissions may vary by model. - BLE setup is not available on all Rinnai products. Some products may require the RWM200 Wi-Fi Module accessory, sold separately. - For safety and product support reasons, some device setup and service permissions may be restricted to Rinnai professionals. Read our Data Use and Privacy Policy, Terms, and other important information in the legal section of our App Store description or at the web addresses below. TERMS OF SERVICE https://www.rinnai.us/terms-of-use PRIVACY POLICY https://www.rinnai.us/privacy-policy

Screenshots

Hydrawise4 screens
Rinnai Central4 screens

Verdict

The call

The clearest difference is rating: Hydrawise at 4.7 against Rinnai Central's 1.6. Hydrawise also leads on review sentiment (39% vs 9%) and ratings volume (67K vs 403). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Hydrawise holds the better App Store score, 4.7 against 1.6. That said, the two scores are not equally well evidenced: Hydrawise has 67K ratings behind it against 403, so its average is the more settled of the two. Written reviews point the same way: 39% of Hydrawise's written reviews are positive against 9% of Rinnai Central's.

UpkeepUpdate frequency

Hydrawise ships an update every 3 weeks, Rinnai Central every 6 weeks. Both last shipped on November 13, 2026.

Scorecard3 real differences · 7 level
Hydrawise versus Rinnai Central: the parameters behind the verdict, then further details
ParameterHydrawiseRinnai Central
PriceFreeFree
Rating4.7 (67K ratings) — better1.6 (403 ratings)
Positive reviews39.0% of reviews — better9.0% of reviews
Number of ratings67K — better403
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.016.0
Further details — not scored
Size143 MB90 MB
Age rating4+4+
DeveloperHunter IndustriesRinnai America Corp

Customer experience

Hydrawise

All ratings67,161 ratings
Positive92.3%
Neutral1.9%
Negative5.9%
Written reviews890 reviews
Positive39.0%
Neutral9.3%
Negative51.7%

Rinnai Central

All ratings403 ratings
Positive11.9%
Neutral3.5%
Negative84.6%
Written reviews223 reviews
Positive9.0%
Neutral4.5%
Negative86.5%

User reviews

Hydrawise

From 67K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Improved performance
  • 💡 Useful features like weather-based watering
  • 🔒 Secure system

Room to improve

  • 🐛 Connectivity issues
  • 👎 Confusing user interface
  • 🔍 Difficult to find/access certain features
  • 📉 Lack of important functionality from previous app

Rinnai Central

From 403 App Store ratings

What we love

  • 🚀 Works great
  • 🚀 Much improved
  • 🚀 Fantastic
  • 🚀 Working perfectly now

Room to improve

  • 🐛 Doesn't work at all
  • 🐛 Bug in 4.3.0
  • 🐛 Awful. Just terrible
  • 🐛 Lousy App
  • 🐛 Rinnai does not care

Bugs and requests

Hydrawise

Reported bugs

3 issues
  • App crashes on launch
  • Zones not starting as scheduled
  • Incorrect flow rate and water usage data

Requested features

4 requests
  • Ability to pause/resume programs
  • Customizable watering schedules
  • Improved reporting and historical data
  • Easier manual zone control

Rinnai Central

Reported bugs

3 issues
  • Control failed is still happening in latest version
  • Login screen freezes
  • Incompatible with older devices

Requested features

3 requests
  • Add device through Bluetooth missing
  • Dark mode option
  • Advanced analytics dashboard

In-app purchases

None

Hydrawise

No in-app purchases

None

Rinnai Central

No in-app purchases

Questions

Is Hydrawise free?
Hydrawise is free to download, with no in-app purchases.
Is Rinnai Central free?
Rinnai Central is free to download, with no in-app purchases.
Which has better reviews, Hydrawise or Rinnai Central?
Hydrawise is rated higher. Hydrawise averages 4.7 out of 5 from 67K ratings, while Rinnai Central averages 1.6 from 403 ratings.
Do Hydrawise or Rinnai Central have ads?
Neither Hydrawise nor Rinnai Central shows ads.
Which is updated more often, Hydrawise or Rinnai Central?
Hydrawise ships an update every 3 weeks, and Rinnai Central every 6 weeks. Most recently, Hydrawise was updated on November 13, 2026 and Rinnai Central on November 13, 2026.

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