2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
Hello sir,
I'im using the trial version on Mac. When I load the light frames, i'm asked to indicate which filter APP has to assign to the light frames. I have ticked the LPS box given that I used a filter to reduce the light pollution.
Was I right or wrong?
Which box do I have to tick when I'am asked to indicate to which session APP needs to assign the frames:
 Is "session 1" right?
For the dark frames, I'am asked to answer to the question: " to which channel/filter do we need to assign the frames". Do I answer "LPS" or "All channels" given that I've used the LPS filter?
Do I need to assign the dark frames to all sessions?
thanks in advance for your answers,Â
 Best regards.
 Serge
@sergecohenfree-fr Hi Serge,
The answer to your first question really depends on which filter you used.
Regarding the sessions, if you only want to integrate lights from a single imaging session then "session 1" is right.
for the dark frames, since no light is involved in taking them, you can assign them to "all channels". Same for sessions. If you only loaded lights in session 1 then APP will automatically apply the darks only to that session.
HTH, Wouter
Thank you very much. The filter is Nisi natural night. Do I have to tick LPS in order to assign it to the lights?
thanks in advance.
@sergecohenfree-fr This looks like a broad band filter to me. In this case there is no difference between using LPS or leaving it at RGB.
Ok thank you very muchÂ
