Mar 28 2026 APP 2.0.0-beta40 will be released in 7 days.
It did take a long time to have the work finished on this and it will have a major performance boost of 30-50% over 2.0.0-beta39 from calibration to integration. We extensively optimized many critical parts of APP. All has been tested to guarantee correct optimizations. Drizzle and image resampling is much faster for instance, those modules have been completely rewritten. Much less memory usage. LNC 2.0 will be released which works much better and faster than LNC in it's current state. And more, all will be added to the release notes in the coming weeks...
Update on the 2.0.0 release & the full manual
We are getting close to the 2.0.0 stable release and the full manual. The manual will soon become available on the website and also in PDF format. Both versions will be identical and once released, will start to follow the APP release cycle and thus will stay up-to-date to the latest APP version.
Once 2.0.0 is released, the price for APP will increase. Owner's license holders will not need to pay an upgrade fee to use 2.0.0, neither do Renter's license holders.
Hi,
I've been testing APP for a week, because with Deep Sky Stacker I always have the problem that the stars are not congruent on top of each other when stacking several nights (due to the lens distortion).
Unfortunately, my previous tests have failed due to insufficient memory and / or not enough RAM (I have set 10 GB).
I wanted to stack a total of approx. 580 pictures from two nights and drizzle the picture twice, because the object itself is very small.
In another test I left out the drizzle setting and it is currently still running (for over 20 hours now). Is it possible to stack individually every night and stack the results together again or should I always stack all lights / darks / flats / bias at once? That could be a problem for me because I wanted to stack up to 900 images.
Many thanks in advance for your help
@hkuenemund Hi Heike. Yes, you can split up the data into, say, 2 or even 3 or 4 sets and integrate those separately. Then you can load the integration results as lights (don't load any calibration files), go to tab 6 and integrate them.
Yep, like Wouter mentions, with that many frames it's much better to make sub-integrations first.
That sounds good.
And can I use drizzle to scale up the picture when I stack the sub-integrations, or should I already do that when I stack the individual sessions?
When I have stacked the sub-integrations, can I add any new sub-integrations to this result or should I always stack all sub-integrations again when I have a new session?
@hkuenemund It shouldn't really matter when you apply it, as long as you make sure to apply it to all sub-integrations if and when you choose to do so. And yes, you can add more sub-integrations later. When adding sub-integrations to an intermediary integration, the SNR will be slightly lower than when integrating all sub-integrations again but the difference should barely be noticeable, if at all.
