# Rinnai Central vs PlumBuddy

The clearest difference is review sentiment: PlumBuddy at 100% against Rinnai Central's 9%. PlumBuddy also leads on rating (4.4 vs 1.6) and update cadence (every 11 days vs monthly). Rinnai Central's advantage is ratings volume (396 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PlumBuddy holds the better App Store score, 4.4 against 1.6. That said, the two scores are not equally well evidenced: Rinnai Central has 396 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 9% of Rinnai Central's written reviews are positive against 100% of PlumBuddy's.

Rinnai Central ships an update monthly, PlumBuddy every 11 days. The most recent releases landed on October 27, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Rinnai Central | PlumBuddy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (396 ratings)](https://appshunter.io/ios/app/rinnai-central/id6444321202/reviews) | **[4.4 (5 ratings)](https://appshunter.io/ios/app/plumbuddy/id6744320200/reviews)** |
| Number of ratings | **396** | 5 |
| Positive reviews | 9.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free | Free |
| Size | 79 MB | 59 MB |
| Requires iOS | 15.4.1 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rinnai America Corp](https://appshunter.io/developer/1045235922) | [PlumBuddy Inc](https://appshunter.io/developer/1807060721) |

## What reviewers say

### Rinnai Central

[App page](https://appshunter.io/ios/app/rinnai-central/id6444321202)

This app connects Rinnai tankless water heater owners to their devices for temperature control and scheduling. Professional installers can use it to register appliances, perform service, access documentation, and order parts.

**Highlights:** Adjust water temperature, Schedule hot water, Activate recirculation, Register appliances, Perform remote service, Access documentation, Order replacement parts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- Control failed is still happening in latest version
- Login screen freezes
- Incompatible with older devices

**Requested features**

- Add device through Bluetooth missing
- Dark mode option
- Advanced analytics dashboard


### PlumBuddy

[App page](https://appshunter.io/ios/app/plumbuddy/id6744320200)

Monitor and control your home's water system remotely. Receive real-time alerts for leaks and track water usage to prevent damage and identify issues. Manage multiple properties from a single account.

**Highlights:** Real-time water data monitoring, Remote water shut-off, Automatic leak detection, Customizable alerts (email, SMS, push), Multi-property management, Live water usage tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rinnai Central free?

Rinnai Central is free to download, with no in-app purchases.

### Is PlumBuddy free?

PlumBuddy is free to download, with no in-app purchases.

### Which has better reviews, Rinnai Central or PlumBuddy?

PlumBuddy is rated higher. Rinnai Central averages 1.6 out of 5 from 396 ratings, while PlumBuddy averages 4.4 from 5 ratings.

### Do Rinnai Central or PlumBuddy have ads?

Neither Rinnai Central nor PlumBuddy shows ads.

### Which is updated more often, Rinnai Central or PlumBuddy?

Rinnai Central ships an update monthly, and PlumBuddy every 11 days. Most recently, Rinnai Central was updated on October 27, 2026 and PlumBuddy on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*