# Wattr — Smart & Sustainable Swimming

> Smart & Sustainable Swimming (iPhone/iPad app by Sempl.)

- Source: https://appshunter.io/ios/app/wattr/id6465175618 (this page in markdown: same URL + `.md`)
- Developer: [Sempl](https://appshunter.io/developer/1705892374)
- Category: Utilities, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 58 MB
- Languages: American English
- Released: 2024-02-10
- Data updated: 2026-08-23
- User reviews in markdown: https://appshunter.io/ios/app/wattr/id6465175618/reviews.md

## What is Wattr?

The wattr pool control system makes use of an advanced swimming pool model to efficiently manage your pool's heat pump. Our self-learning algorithm integrates this model, your preferences, and weather forecasts to predict and optimize energy consumption. The system comes with a physical controller, connecting all your pool devices, and an easy-to-use mobile app, putting you in complete control. Please note: This app requires a Wattr module to function. The Wattr module is a separate device that connects to your pool installation and tracks its energy consumption. Without the Wattr module, the app will not be able to provide any data or functionality.


## Version history (last 5 releases)

### 1.15.28 — 2026-08-19

NEW:
- It is now possible to use the speed of the circulation pump as an input/'IF'-clause for automations
- It is now possible to use the heatpump's ambient temperature as an input for automations

### 1.15.27 — 2026-08-11

NEW:
- It is now possible to configure automations to send custom push notifications
- In the circulation page, you can now see a history of backwash moments and durations

### 1.15.24 — 2026-08-04

Fixes a bug that caused some online devices to appear offline

### 1.15.23 — 2026-07-31

NEW:
- automations can now be (persistently through module restarts) enabled or disabled.
- the state (active/inactive) of each automation is visualised in the control page
- heatpump inlet temperature and water quality values can now be used as automation inputs

### 1.15.22 — 2026-06-12

NEW:
 - activation and deactivation delays for automations
CHANGED:
 - various smaller bugfixes

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| --- | --- | --- | --- |
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| [NorsupOne All in one](https://appshunter.io/ios/app/norsupone-all-in-one/id1664752986) | — | Free | Utilities |
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| [Fasttelphone](https://appshunter.io/ios/app/fasttelphone/id1582782567) | — | Free | Utilities |
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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 2026-08-23.*