Decent speed, a pity that Y-scale isn't animated and sloppy on vertical scrolling.

App crashes when scrolling or scaling a zoomed chart and tapping zoom out

App crashes on 4th zoomed in chart, when u start clicking the button to hide the first series and click zoom out and release the finger from the button at the same time

When only one column is visible and selected range is changed quickly user can notice green shape on background which is visible even in static as thin stroke around main chart.

Pie chart animations are not smooth. Looks like some kind of draw(rect:).

According to design current maxY must be higher than the top line.

— The graphs are below the X-axis (the attached screenshot #1).
— The pie chart is slow when filtering.
— The box with the details about points on the graphs is blinking when filtering.
— Oranges filtering animaiton is incorrect (the attached video #2).
— Another pie chart glitch (the attached screenshot #3).  
— iOS 11+ only.

First scroll very bigs lags, after small lags

Y-axis is not animated, only values are changed.

Bars chart have lags and twitches

Hi, amazing app size (specially because you supporting zoom feature) and I like that you save selected position that was before zoom in after zoom out (it’s not by design, but I think it’s much better UX).
Two small issues I find:
1. When I changing zooming detection animation of x axis become strange
2. When I’m changing pie chart filter I see lags and my iPhone become very warm (even I’m testing on XS Max)
But it’s just details and as work it’s really great with a lot of small details 👍

After restore application from background, we can see black saw blink black view

This "amazing app size" is achieved by not supporting 32-bit devices. I think it is unacceptable.

Does not support iOS 8. Telegram does.

Major issue: does not support iOS 10.

minY and maxY are calculated for old chart window, not including new spaces to the left and to the right in round 2

bar chart is wrong here

Major issue: 40-43 fps when scaling 1st chart on iPhone 6+. For more details read my comments about performance of entry213.

Major issue: Y-axis is not animated. Not only the UX is suffering, but also it gives this contestant a major advantage in performance over other participants.

Chart max line must be higher than last y-axis line

Wrong end date

Wrong chart position

Chart cutted off

Tooltip beyond the border

Percentage chart must have 25% step

Tooltip blinks

Wrong line position while selection beyond the borders

Chart blinks

Tooltip blinks on filter animation