Filtering graph #3 results in visual glitches. Slightly sloppy on vertical scrolling, but average to good performance overall.

The app crashes when applying filters on stacked bar chart.

Charts can become unusable until relaunch

STR:
1. zoom into any chart
2. hold trimmer handle
3. press zoomout multiple times
4. release the finger from the handle

Optimization points algroithms looks is bad...

bar animations are inconsistent, some are disappearing on their place and appearing from the top. Pears disappear from the bottom and appear on top of the shown series

— The third graph blinks when filtering (the attached video #1).

— The app crashes when scrolling and zooming out simultaneously (the attached video #2).

Y-axis origin should match minimum value in selected range. Range selection control has not totally correct design.

Bar chart values change during range selection.

This chart should not have a filter button

only three date labels on full interval.

bad animations if fast click on visible changer

Design issues and theme changing inconsistency.

1. Navigation bar in nightmode is incorrect
2. Percentage chart doesnt show percents
3. Axes overlap the tooltip
4. Axis lines are not transparent and are on top of series
5a. 4th chart has a button that is unclickable
5b. 4th zoomed in chart has trimmer
6. Trimmer design incorrect
7. Tableview section separator colors incorrect

8. Switching theme changes colors instantly everywhere, while axis lines and disclosure indicator on the tooltip are taking time to animate

Some points are simply removed which results in incorrect mini chart appearance

wrong font on tooltip values

wrong minimum and maximum

Major issue: Minimum is not updated at all during scaling. Thus UX is suffering and this contestant gains major advantage in performance over other participants.

Wrong area chart height

dates have incorrect position

Horizontal lines intersect dates during fast scrolling

slider's width changes during the scrolling

Major issue: Line charts shimmer during slow scaling. Thus UX suffers and this contestant gains significant advantage in performance over other participants (looks like he uses only integer values for chart points in order to achieve better performance, but this looks quite bad).

Major issue: 33 fps on iPhone 5 during 1st chart scaling. For more details read my comments about performance of entry213.

date labels are overlapped with each other

Does not support iOS 8. Telegram does.

Wrong design

All charts, except percentage chart, must have 6 lines on y-axis

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

Don't see green dot under tooltip

Wrong chart position

Wrong start and end date

Free space under the charts

Wrong tooltip position

Dots blinks and hide beyond the borders

Tooltip shakes while scrolling

Wrong tooltip position

Filter buttons blinks on scrolling

x-axis blinks and hide

Tooltip always tries to be on the left side of the line