Retra UWT 3.1.32 - App Store

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About Retra UWT

The companion App for Retra Flash devices. Connect your Retra Flash via the App, check usage statistics, get firmware updates, access user manuals and more. Version History Added connectivity and user manual for Maxi...

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

Version History Added connectivity and user manual for Maxi strobe (FW1.0). Firmware Update for Pro Max II (FW 4.0): - This update adds the Pilot Light Toggle (PLT) function. Activate PLT by holding the pilot/test button for 5 seconds while in HSS mode. Once activated, PLT works in all modes where the pilot light can be used. Moving the power dial one step up and down within 1 second simulates a press of the pilot/test button, allowing you to adjust the pilot light or turn it off. You can also turn off the pilot light in any mode by moving the dial one step down and up. Firmware Update for Retra Flash Pro Max (v2.17 - two.seventeen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 3.1.32 Feb 10 Firmware Update for Pro Max II (FW 3.6): - This update adds the Pilot Light Toggle (PLT) function. Activate PLT by holding the pilot/test button for 5 seconds while in HSS mode. Once activated, PLT works in all modes where the pilot light can be used. Moving the power dial one step up and down within 1 second simulates a press of the pilot/test button, allowing you to adjust the pilot light or turn it off. You can also turn off the pilot light in any mode by moving the dial one step down and up. Firmware Update for Retra Flash Pro Max (v2.17 - two.seventeen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 3.1.24 10/28/2025 User manuals and connectivity for Pro Max II (FW 3.1). Firmware Update for Retra Flash Pro Max (v2.17 - two.seventeen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 3.1.20 07/31/2025 User manuals and connectivity for Pro Max II (FW 3.1). Firmware Update for Retra Flash Pro Max (v2.13 - two.thirteen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 3.1.19 07/27/2025 Firmware Update for Retra Flash Pro Max (v2.13 - two.thirteen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 2.1.1 03/04/2025 Firmware Update for Retra Flash Pro Max (v2.13 - two.thirteen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 (renamed 3.13) for Pro X/Prime X (3rd Gen) and firmware 4.5 (renamed 4.3) for PRO/Prime (2nd Gen). 2.0.9 03/01/2025 Firmware Update for Retra Flash Pro Max (v2.13 - two.thirteen), Prime+ (v2.4), and Pure (v2.4). This update includes important bug fixes and performance improvements, such as: - Enhanced empty battery detection and indication, reducing false warnings. - New trigger recalibration function: In case of misfires, go to TTL mode, hold the pilot/test button for 6 seconds to start recalibration (indicated by "CAL"). The strobe will emit 5-10 high-intensity flashes to complete the process. - Improved pilot light stability when using 8xAA batteries, reducing flickering. - Additional updates to improve overall reliability and robustness. This App also includes firmware 4.2 for Pro X/Prime X (3rd Gen) and firmware 4.5 for PRO/Prime (2nd Gen). 2.0.8 02/26/2025 Firmware update 2.2 for Retra Flash Pro Max includes the following improvements: - optical sensing is enhanced when using inefficient fibre optic cables, - solves a rare issue with unresponsive mode dial and - reduces the chances of a false leakage alarm in high moisture environments. Includes firmware 4.2 for Pro X/Prime X (3rd Gen) and 4.5 for PRO/Prime (2nd Gen). 2.0.7 07/05/2024 Firmware update 1.48 for Retra Flash Pro Max users. Issue with power level adjustment in mode M and 1/250 sync is resolved. Also includes firmware 3.15 for Pro X/Prime X and 4.3 for PRO/Prime. 2.0.6 01/16/2024 Includes a critical firmware update 1.40 for Retra Flash Pro Max and user manual. The firmware update is mandatory for all Retra Flash Pro Max users. 2.0.5 12/29/2023 Includes firmware update 3.15 for Retra Flash Pro X/Prime X. The firmware update improves the mode and power dial reading accuracy and reduces the chance for unresponsive dials. All changes from firmware update 3.11 are included. More details are available from the user manual topic FW Update. 2.0.4 05/23/2023 Includes FW update 3.11 for Retra Flash Pro X and Prime X. The following changes have been made: - A bug that resulted in device falsely indicating slow charging has been resolved. - More bug fixes and improvements are included, please read the "FW UPDATE DETAILS" in the user manual inside the App. 2.0.1 01/11/2023 Includes FW update 4.5 for Retra Flash PRO and Prime which solves a bug related to unresponsive dials. FW update 3.4 for Retra Flash Pro X and Prime X is also included. Both updates greatly improve the triggering and charging protocols of the Retra Flash. The following changes have been made: - A bug that resulted in device turning off, when using the pilot light and with sound turned on, has been resolved. - A bug that resulted in misfires with a very strong trigger light has been resolved. - TTL protocol is updated with improved accuracy and range when using LED triggers. - Capacitor charging is improved for a faster and more stable output regardless of battery type. - "Always batt" mode has been disabled on all flashguns due high probability of false battery readings while the flashgun is in operation. Please use the BATT/TEST mode for battery indication. More details in the topic BATT/TEST. - Error override function is available by long pressing the PILOT/TEST button. Please see the use manual topic ERRORS for more details. - Indicator light breathing effect is disabled in the majority of operating modes due to user confusion. - Minor bug fixes and improvements are included. 2.0.0 11/08/2022 Includes FW update 3.4 for Retra Flash Pro X and Prime X and FW update 4.3 for Retra Flash PRO and Prime. Both updates greatly improve the triggering and charging protocols of the Retra Flash. The following improvements have been made: - A bug that resulted in device turning off, when using the pilot light and with sound turned on, has been resolved. - A bug that resulted in misfires with a very strong trigger light has been resolved. - TTL protocol is updated with improved accuracy and range when using LED triggers. - Capacitor charging is improved for a faster and more stable output regardless of battery type. - "Always batt" mode has been disabled on all flashguns due high probability of false battery readings while the flashgun is in operation. Please use the BATT/TEST mode for battery indication. More details in the topic BATT/TEST. - Error override function is available by long pressing the PILOT/TEST button. Please see the topic ERRORS for more details. - Indicator light breathing effect is disabled in the majority of operating modes due to confusion. - Minor bug fixes and improvements are included. 1.9.9 06/22/2022 Includes FW update 3.4 for Retra Flash Pro X and Prime X and FW update 4.3 for Retra Flash PRO and Prime. Both updates greatly improve the triggering and charging protocols of the Retra Flash. The following improvements have been made: - A bug that resulted in device turning off, when using the pilot light and with sound turned on, has been resolved. - A bug that resulted in misfires with a very strong trigger light has been resolved. - TTL protocol is updated with improved accuracy and range when using LED triggers. - Capacitor charging is improved for a faster and more stable output regardless of battery type. - "Always batt" mode has been disabled on all flashguns due high probability of false battery readings while the flashgun is in operation. Please use the BATT/TEST mode for battery indication. More details in the topic BATT/TEST. - Error override function is available by long pressing the PILOT/TEST button. Please see the topic ERRORS for more details. - Indicator light breathing effect is disabled in the majority of operating modes due to confusion. - Minor bug fixes and improvements are included. 1.9.8 06/17/2022 - App version 1.9.1 includes firmware update for Retra Flash PRO & Prime version 3.13 with improved charging system and other bug fixes and improvements. - Includes firmware update for Retra Flash Pro X version 2.17 with improved TTL accuracy and range when using LED triggers, improved charging system and other bug fixes and improvements. Retra Flash Prime X remains at FW version 1.0. 1.9.1 02/08/2022 - App version 1.9.0 includes firmware update for Retra Flash Pro X version 2.17 with improved TTL accuracy and range when using LED triggers, improved charging system and other bug fixes and improvements. Retra Flash Prime X remains at FW version 1.0. - Includes firmware update for Retra Flash PRO and Prime version 3.12. Detailed description of the firmware version 3.12 for Retra Flash PRO and Prime is available here: https://www.retra-uwt.com/blogs/news/retra-flash-prime-pro-firmware-update 1.9.0 12/28/2021 - App version 1.8.8. supports the new Retra Flash Pro X and Prime X (current firmware version is 1.0). - Includes firmware update for Retra Flash PRO and Prime version 3.12. Detailed description of the firmware version 3.12 for Retra Flash PRO and Prime is available here: https://www.retra-uwt.com/blogs/news/retra-flash-prime-pro-firmware-update 1.7.8 05/08/2021 - 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: https://www.retra-uwt.com/blogs/news 1.7.7 03/03/2021 - 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: https://www.retra-uwt.com/blogs/news 1.7.6 02/26/2021 - Firmware update (3.6) for Retra Flash PRO and Prime. 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, 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 3.6 is available in the news section of our website: https://www.retra-uwt.com/blogs/news 1.7.5 02/24/2021 - Firmware update (3.5) for Retra Flash PRO and Prime. 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. Minor tweaks and improvements. - User manual for the Retra Flash Prime/PRO is updated in the topics: BATT/TEST, 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 3.5 is available in the news section of our website: https://www.retra-uwt.com/blogs/news 1.7.4 02/23/2021 - Firmware update (2.5) for Retra Flash PRO and Prime. The firmware update includes support for the Supercharger and improvements of Smart SL, HSS, BATT/TEST and U2 modes. Smart SL mode now features an advanced pre-flash detection program for cameras which vary the pre-flash sequence. HSS mode comes with improved timings for synchronisation close to 1/250 and a revised triggering protocol which reduces the chance of misfire at power levels below 50%. In BATT/TEST mode the battery indicator is improved to reduce the chance of a false battery reading. U2 mode is now bug free and can be saved with any advanced features of the flashgun (HSS, Smart SL, Pilot adjust, etc.). - User manual for the Retra Flash Prime/PRO now includes the user manual for the Supercharger. 1.7.3 11/01/2020 - Firmware update (2.5) for Retra Flash PRO and Prime. The firmware update includes improvements of Smart SL, HSS, BATT/TEST and U2 modes. Smart SL mode now features an advanced pre-flash detection program for cameras which vary the pre-flash sequence. HSS mode comes with improved timings for synchronisation close to 1/250 and a revised triggering protocol which reduces the chance of misfire at power levels below 50%. In BATT/TEST mode the battery indicator is improved to reduce the chance of a false battery reading. U2 mode is now bug free and can be saved with any advanced features of the flashgun (HSS, Smart SL, Pilot adjust, etc.). - User manuals for the Retra Flash Prime/PRO are updated with the latest information. 1.7.0 10/09/2020 - Firmware version fix. If you updated to flashgun firmware version 1.1 please update again to receive the latest production ready release. - A bug is preventing users to save the operating mode for U2 position - default is Smart SL mode. U1 position works normally and all Advanced operating modes can be saved. A new flashgun firmware update will be released soon to amend this issue. What has changed since the previous version: - Google translate is added into user manuals 1.5.7 03/24/2020

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Previous Versions

Here you can find the changelog of Retra UWT since it was posted on our website on 2025-05-02 16:11:32. The latest version is 3.1.32 and it was updated on 2026-06-10 16:55:48. See below the changes in each version.

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