This app allows you to control a 2, 4 or 8 Channel Relay Module Bluetooth BLE with your iPhone or iPad.

To use this app, you need one of these three modules:
"2 Channel Relay Module Bluetooth BLE"
"4 Channel Relay Module Bluetooth BLE"
"8 Channel Relay Module Bluetooth BLE"

These modules can be ordered at many online shops. Please use a search engine to find a shop.

This app can be connected with any number of modules. By entering an alias, the modules are marked clearly and can easily be assigned to a use area. Name the modules for example "Relay 1", "Relay 2", "Electronic lab project" or "Ambient Light".

An alias can also be entered for each relay.

The default password for these modules is usually "12345678". For more security, the app also allows you to change the password. The password must be eight digits long.

What’s New

Version 4.2

Adapted to the new operating system.

Ratings and Reviews

3.8 out of 5
31 Ratings

31 Ratings

zipperhead23 ,


Wish response was a little quicker but overall I like it

Flintstone, Fred ,

Hope it works - no joy yet.

But I have confidence. 8 Relay board en route. No luck pairing a 4, yet, with this ap.

Is it possible to configure (on a per board basis) the relays to be interlocking - one at time only - or momentary contact - also called inching - with adjustable contact duration?

Ando13083 ,


Useless trying to use it unless you pay them to remove the ads

Developer Response ,

Thank you for your feedback. You can use the app without paying anything. If you are bothered by the advertising, you can remove it with an in-app purchase.

App Privacy

The developer, Vitalij Schaefer, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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