Slow strokes on iPad

Tristratos 2 years ago in iOS updated by Jona (Co-Founder & Lead Developer) 2 months ago 29

as much as I love FlipaClip, there is one event that I find VRY annoying.

The strokes o latest ios on an iPad 12.9 gets slow before they hit the final Apple Pencil tip.

There is a certain amount of lag that prevents the user feel comfortable with the sketching experience into the app.

Please note that this is already fixed in other apps like procreate in which NO lagging is apparent.

Can’t we have eventually a real-time representation of Apple Pencil strokes without any kind of delay/lag ?


The app is perfect it is this feature -along with undo/redo gestures- that I am missing still



Hey! Sorry, not responding to your other post. So we are working on a much-improved draw engine. The main focus is to improved response time and to use all Apple Pencil features! ETA... well can't give any but once any news is available I'll make sure to let you know here.


Any update on. This issue ?

Hopefully not to take away from Tristratos's issue, but I am also seeing a delay on my google pixelbook strokes when the app is fullscreened, the default window size does not lag. There was about a weeks time maybe a month or two ago (Don't quote me), where the lag disappeared, but then returned after that. 

   10452.96.0 (Official Build) stable-channel eve


   Currently on stable

ARC Version 



   537.36 (@) 



Under review

Thanks for posting about this. Any chance you can record a video showing the lag on your ipad? Would need to use another device to do the recording. This is just to confirm what type of lag you get. In general our draw engine is fairly fast but there are areas of improvement such as Apple Pencil predictive touch points. We are already planning on revamping our draw engine and we will definitely be exploring this extra data from the Apple Pencil to improve lag.


Just saw your response (I wish this forum would sent an email directly to my email box notifying me whenever any new post is added - if it did I just missed it)

Anyway, in the following link you may find the video that showcases the issue.


That is shot from an iPhone while I was scrubbing the issue in an iPad Pro 1st gen with the pencil brush.

Please note that no other app was running simultaneously in the background. It is only the FlipaClip on its own.

As you may see from it, the engine can hardly keep up the initial information drawn from the Apple Pencil and as you may see it just approximates the drawn curve than being an accurate one in the very end.

The example just shows a circle being drawn (which is a vital step in general) but of course same happens with any shape. It misses the first and very important information drawn.

PLEASE fix this nasty issue. It brakes the nice overall experience from the app. If there is any additional information needed, please let me know so that I may provide it accordingly.

P.S. btw, other than this, I also miss the under/redo gestures (with two and three finger tapping that is almost set as default nowadays) instead of having to manually go away and hit the icon itself. Any chance for that also?


Did you check the video?

Did you manage to recreate the lag issue ?

Any chance we might expect this to be fixed ?

If so, how soon that might be/?

Please keep us posted


Could you please update us on this?


Will you PLEASE inform us in regard to this ?


Please let us know about this issue.

FlipaClip is nice but still such initial lag makes it look unprofessional and unusefull. All other apps like procreate and clipstudio do NOT have such drawing lag.

And that on a full blown iPad Pro 12.9 1st gen!

Even less capable iOS apps (like animatica/ rough animator manage to be better than FlipaClip in this respect with no apparent lag.

The strokes NEED to be real-time and perfectly accurate to be of any meaning.

Having lines -due to lag- where Apple Pencil draws a curves is unacceptable!


Should we expect a decent fix for this buggy behaviour?

If that is already in the works I would be GLAD to beta test and help this move forward

PLEASE keep us posted

An answer from you as to what to expect and when is highly appreciated!


So many app updates, still the fundamental issue with strokes being lagged using Apple Pencil as shown in


Is NOT fixed

Should we expect ANY update on this soon?

Your response is highly appreciated of what to expect


Oh man! I apologize not getting this any sooner! :( 

I have created an internal ticket that will be in my face... I have tried this on the latest ipad pro and couldn't reproduce. I have seen your video. Thank you for providing that. I'll get my hands on a 1st gen iPad pro to look into this!

I am having a similar problem. It's very frustrating.

I've found the following scenarios:

  1. If ONLY my stylus is touching and no part of my hand, there's NO lag.
  2. If i rest the palm of my hand down FIRST then draw with the stylus, there's NO lag.
  3. But if i start drawing and my palm touches from time to time, there IS lag.

The frustrating thing is while drawing the palm/heel of your hand will come on and off the surface. So it's easy for the lag to come in and out. I don't think it's natural to always draw with your hand hovering and not touching the screen. Also unrealistic to place your hand down first before the stylus touches. 

I've also tried the different options (stylus only, stylus and touch) and I don't see a difference between the two. It's a huge drawback for drawing. I would try reinstalling the app but i'm afraid of losing my projects. 

I'm using a first generation ipad pro.


Thank you for providing these steps! Really helpful!


I'm uploading a new beta build with a potential fix. However, I'm not sure if it will fix it or not as I haven't been able to reproduce the issue. I'm waiting to get an iPad PRO 1 gen to test. If you like to join the beta testers group please follow this link:


Hi Jona,

Awesome! Thanks for working on this so quick. I'll join the beta test group and let you know how it works. 

Dear Jona!

THANK GOD you are still there and this thread catches your attention once more!

Indeed I noticed that when the Palm is not on screen, the strokes work with no delay as expected.

On the other hand, when the Palm is on, as you may see in the video, the strokes may get delayed quite a bit, which makes the whole experience frustrating!

It has to be noted that on the same iPad 12.9n1st gen, other apps (like procreate and even rough animator) do NOT have such an issue even if the Palm is on screen.

As drawing with palm on screen is almost essential to draw with ease and convenience, PLEASE DO FIX this nasty bug.

I just checked the latest beta available (1.3.3 -88) in testflight and the issue still exists!

PLEASE keep us posted as to when should we expect a fix to retest

Sorry to hear that Trisratos. I haven't given the beta a try yet.

Will i lose all of my projects if i install the beta?

I just downloaded bet 1.3.3 -88. I'm still having the same problem with lag. 

I just tried the current build version on a more recent iPad (about a year old) and had no lag issues. This might just be a problem with 1st generation iPads.

Dear Jona,

I just tried even on latest beta 3.5 (91) on an iPad Pro 12.9 1st gen.

unfortunately the stroke lag issue still exists!

    Confirmed once more that the lag takes place only when Palm is on screen as mentioned above.

    PLEASE let us know if and when should we expect a fix for this


    Thank you for letting me know. I was about to write that a new build is available but you have already updated.

    I thought that maybe the fix "Pan/Zoom/Rotate now disabled once Apple Pencil is detected." would resolve this.

    I'll be further looking into this and I'll update you guys once I get something. Thanks for beta testing!!!


    Just tried also with latest 1.3.5 (92)"

    Unfortunately still lag is present once Palm is on screen.

    Waiting for next build to retest.

    Keep us posted

    Thanks for the quick update. I tried 1.3.5 (92) as well. Same lag problem. 


    I downloaded version 1.3.6 (93). I've been drawing with it for about 20 minutes and it has much less lag. Although not 100% perfect. I would say i experience lag 5-10% of the time as compared to about 50% in previous versions.

    Great progress! It's much more usable to draw long term now.


    Same here. In latest build there seems to be an improvement BUT NOT exactly perfect yet.

    The lag still occurs randomly here and there and of course when the palm is set on screen -which is the most convenient way to draw.

    PLEASE let us know if and when this is FULLY fixed


    Still with latest version 1.3.9(99), strokes remain slow and unproductive.

    Can you PLEASE let us know if, what and when should we expect a fix to this fundamental bug ?


    According to the latest ipadOs,Pencil kit api, offers significant Apple Pencil speed improvement.

    In fact according to this article:


    The new APIs require just three lines of code for developers to get the same low latency, UI, and tool palette that Apple uses for Pencil. That includes the drop from 20 milliseconds to 9 milliseconds latency that Apple announced during its unveiling of iPadOS.

    You may view from apple’s Site link below how to do that:


    Is there ANY. Nance to make flipaclip lighting fast after all?



    Hey! Sorry, not responding to your other post. So we are working on a much-improved draw engine. The main focus is to improved response time and to use all Apple Pencil features! ETA... well can't give any but once any news is available I'll make sure to let you know here.


    Thank you for letting us know.

    Still, it would be highly appreciated if you could let us know by when do expect this to happen. Soon (within the next couple of months) or later (after a year or so)