The companion App for Retra Flash devices. Connect your Retra Flash PRO/Prime via bluetooth, check usage statistics, get firmware updates, access user manuals and more.

What’s New

Version 1.7.7

- App version 1.7.7 now reads the state of the "always batt" switch and shows if "always batt" mode is turned on/off when the Retra Flash is connected.

- Firmware update (3.12) for Retra Flash PRO and Prime fixes a bug in TTL mode which could result in unwanted triggers. Includes minor bug fixes.

- Everything that's new: Faster recycle time and less power consumption in HSS mode at powers below 50%. A bug which caused uneven illumination in HSS mode with some cameras is resolved. New "always batt" mode with battery indication shown in every mode (enable this feature in the settings menu inside the Retra UWT App). New "error override" function which disables any alarm by long-press of the pilot/test button during an alarm. New BATT/TEST mode operating protocol: In BATT/TEST mode the flashgun will automatically start the capacitors charging procedure (white indicator light). Resolved optical signal processing bug when using TTL mode with Supercharger. Indicator light "breathing" effect. A bug that was limiting pilot light output in FW3.5 is resolved. Other minor tweaks and improvements are included.

- User manual for the Retra Flash Prime/PRO is updated in the topics: BATT/TEST, TTL, ADVANCED FEATURES, ADVANCED SETTINGS and ERRORS

Follow the connection instructions and connect your Retra Flash Prime/PRO to the Retra UWT App where you will find a "click for update" button.

A detailed description of the firmware update is available in the news section of our website:

App Privacy

The developer, Retra UWT, Ltd., 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 Not Linked to You

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

  • Usage Data
  • Diagnostics
  • Other 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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