– Very good speed.
– Unfortunately, the data resets when minimizing the app.
– Data points scrolling isn't implemented.
– The third graph blinks when filtering Apples on the third chart zoomed in to the minimum time range.
– Bonus part is partially implemented, the pie chart is missing. Unfortunately, dates are missing on the zoomed graphs.

Incorrect design (scrollbar), sometimes blank graphs after resuming. Sloppy when changing data range on graph #2.

All charts become blank after pausing / resuming the app.

11. I dont know whether it was made by purpose, but "all" section does not sum all only visible values. See previous screenshot.

The Y-axis labels for the blue series are shown and animated even though the blue series is disabled.

6. Small Issue. No dates above charts.
7. Small Issue. Y labels are drawn below lines.

9. "Pears" filter other abrupt animation issue (small issue though). I called this issue "pears" issue. Most of the participants have this issue too. It was hard to eliminate it. Also, there is a strange effect when (seems mine app have the same) when filtering other except pears and at the same time move preview zony it increases very slowly (second video).

12. Small issue. Similar to the previous issue but in percentage chart percent values do not calculated according to visible area's data.

The visible range selector handles are not rounded.

No points run animation and point card position animation. But a lot of good work

Pretty cool zoom transitions!

No anti-aliasing for lines.
Incorrect slider design.
Date marks appears not in between, instead, new marks completely replace others.
In zoomed view slider are "not glued" to days.
No label position animation.
On 4 chart incorrect color with no label and Y-values are not restored when zoom out.

X labels appear randomly and w/o animation

Nice performance, but there is no pie chart, you are in my 'vote up' list. Vote up mine, if it's good enough

[+] nice performance
[+] nice transition animations on zoom in/out
[+] nice effect of when auto height wrap works (smooth accelerate decelerate interpolation)

ISSUES:

1. Date Labels calculated strangely (probably from the center of the viewport). Also the first and the last label of the chart is not aligned with y values/lines. (see video)

2. No "hoover-like" gestures. Only clicks.
3. Small Issue. Bottom dot intersect are clipped (see screenshot).
4. Small Issue. Dates during scale changes are swapped without animations.
5. (Duplicated) No chart preview control zone rounding corners.

8. DUPLICATED. Sad to say, but after resuming your app nothing is shown on screen. Can't vote up for that. Probably it is not a big issue to fix. Could you share your knowledge after the contest? You say something about glContext - are you using OpenGL? Because I use simply canvas and hardware acceleration.

10. Date below chart does not correspond to the intersect date.

Wrong range selected after zoom (smaller than day - contains less than 24 points). Also, for edge date (e.g. 6 april) it opens < 168 hours timeline

Weird glitch when user touches the range selector after zoom in

Theme changing isn't aplied to 'All' value in a tooltip window for 3rd chart

Wrong selection for stacked bar. See to the center of pointer on the video.

Maybe not an issue (my personal taste, but maybe it coincide with tg team): Lines moves along each other (in the video yellow peak sometimes swaps with blue), so, quite often it doesn't match how the preview looks like. In my opinion, they should be displayed with a fixed relation calculated from the whole chart (preview).

Poor performance when changing date range in the first three charts (don't look at gpu profiler coz it's useless in case of opengl)