# Carina

> Remote control and monitoring for Carina grid-interactive water heaters. (iPhone/iPad app by Carina Technology.)

- Source: https://appshunter.io/ios/app/carina/id1347983188 (this page in markdown: same URL + `.md`)
- Developer: [Carina Technology](https://appshunter.io/developer/1347983187)
- Category: Utilities
- Price: Free
- Rating: 4.00/5 from 7 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 40 MB
- Languages: American English
- Released: 2018-11-19
- Data updated: 2026-06-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/carina/id1347983188/reviews.md

## What is Carina?

Gain insight and control over your Carina grid-interactive water heater. 
View current tank temperatures and hot water remaining, monitor critical alarms, track energy usage over time*, and remotely put your water heater into vacation mode.

* The energy usage and energy costs displayed in this app are estimates.




Thermostat icon designed by Hirschwolf from Flaticon.

## Key features

- View tank temperatures
- Monitor hot water remaining
- Track estimated energy usage
- Receive critical alarms
- Activate vacation mode

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/carina/id1347983188/reviews.md

### 2/5 — Update App

*2024-02-02*

App crashes when trying to reconnect water heater to wifi. App needs updates to support Running iOS 17.3.

### 1/5 — App crashes constantly

*2024-01-30*

This app crashes constantly when trying to connect to WiFi. I am using version 2.7.8 on a updated iPhone. Please fix this as it makes the app and device completely useless.

### 5/5 — Great app!

*2020-07-20*

Awesome and extremely helpful

### 5/5 — Great App

*2018-11-20*

Great App!!!!!

## Frequently asked questions about Carina

### What can I do with Carina?

Carina allows you to monitor your water heater's tank temperature and remaining hot water. You can also view critical alarms, track estimated energy usage, and remotely set your water heater to vacation mode.

### Is Carina free to use?

Yes, Carina is available for free download and use. There are no in-app purchases or subscription fees associated with this application.

### What devices does Carina support?

Carina is compatible with iPhone, iPad, and iPod devices, offering a seamless experience across Apple's ecosystem.

### How often is Carina updated?

The latest version of Carina is 2.9.0, last updated on January 9, 2026. While specific update frequency isn't detailed, the app has seen regular updates since its release in 2018.

### What is the age rating for Carina?

Carina has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### Does Carina have ads?

No, Carina does not contain advertisements. Users can enjoy a completely ad-free experience while managing their water heater.

### How accurate is the energy usage data in Carina?

The energy usage and cost data displayed in Carina are estimates. While useful for tracking trends, they are not precise measurements and should be used as a guide.

### Who developed Carina?

Carina was developed by Carina Technology, a company focused on smart home and utility solutions.

## Version history (last 5 releases)

### 2.9.0 — 2026-01-09

Fixes to login and password reset workflows.

### 2.8.9 — 2025-12-31

Fix broken UI in password reset workflow.

### 2.8.7 — 2025-11-19

Add new customer logos.

### 2.8.5 — 2025-06-21

New customer logos.

### 2.8.3 — 2024-04-08

Allow same day selection for vacation mode.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-02.*