Wattr
Sempl Utilities iPhoneiPadiPod touch
Wattr is a free Utilities app for iPhone and iPad by Sempl. Requires iOS 16.6. Updated October 23, 2026.
- Price
- Free
- on the App Store
- Size
- 61 MB
- Age 4+
- Updated
- Oct 23
- 2026 · v1.15.32
Screenshots
About 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.
What’s new
Version 1.15.32 · Updated October 23, 2026
- Fixed a bug causing a heatpump's on/off and sync states to be wrong, for users with multiple pools. - Fixed a bug that caused some timers (relay and automatic backwash timers) to take timezone changes (i.e., summer-winter time changes) into account badly.
App privacy
The developer, Sempl, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: Device ID, User ID
- Location: Precise Location, Coarse Location
- Contact Info: Email Address, Name
Used for: Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data
Used for: Analytics
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