Vertical scrolling is very sloppy, particularly when all the charts are zoomed out to the maximum time range. Poor to average performance overall.

No percent indication on pie chart, no selection of pie chart parts

Bar chart has gaps between colored segments.

Hiding charts while scrolling or scaling makes the app twitch and disposition UI elements

Graph gets splitted into separate bars during animation if you select filter and then move selector

Unable to start scrolling the table when scroll starts inside the range selector

clipped point

Holding down a touch to show annotation and scrolling the trimmer results in lags and Y axis values disposition.

Lags selection bars

Where 100?

Scaling chart with the trimmer and scrolling the chart area with the finger at the same time results in immense lags and bugs.

Grabbing the trimmer on the left side results in attempt to hide the view controller.

Not sure what this blue bar above the zero line is supposed to do.

3 chart. When you move finger the values view moves but the highlighting of bar does not

Poor scrolling performance.

Charts do not animate lines, plot is just changing dependent on position. On top of that, lowest plot line is placed not on bottom.

Values add up to 101 percent instead of 100

It's possible to hide all lines on chart #2, but lines hiding here shouldn't be possible at all.

Hard animation

Value on the Y axes are sometimes clipped.

Changing the theme makes the app ignore user interaction and is slow.

Going back from zoomed chart while touching down makes the tooltip on the main chart not display the disclosure indicator

Wrong design of 4th chart and bugs

Percents are not always 100% on 5th chart

> If by slow you mean having an animation then I guess it's a feature…

Turns out it is slow because the zoomed in chart drops frames.

Overall i like your app though :) all the issues are basically summing up to one issue with processing of touch events and frame rate drop while zooming in. Transitions are really cool! :)

The header displays April 7th, while the data is for April 5, 6 and 30th.

Selection info sometimes displays wrong number of lines.

Selection info has wrong size if you display it after enabling some filters.

Selection zooms in into a range (23-24 March) instead of a single day.

Isn’t there supposed to be a starting grid line at the minimum? On the other hand, there’s an extra grid line without a label on the top.

Stacked chart does not display selection after zooming in. After that the selected bar is colored incorrectly.

Scrolling has visible frame drops even on iPhone X

You can still see chunks of graphs that are not supposed to be visible, when changing filters. Overall changing of visibility looks buggy

# All charts
- Small number of y lines, only 3 that have values, by design you should always have 6 (1.jpeg).
- Charts do not always start at min value line they are supposed to, which leads to a lot of unused screen real estate (2.jpeg)
- The table sometimes loses frames dramatically on scrolling between charts. (stutter.MP4) (has been reported before, here is video from iphone SE)

# Chart 2
- When graphs are right under y values, it makes reading those values pretty hard at times. (3.jpeg)
- The value 750 200 should be directly on or slighlty above the 750k line, on the screenshot it is slighly below (4.PNG)

Does not support iOS 8. Telegram does.

maxY on chart has to be on the same position as y-coordinate of the highest y-value by design

Critical: 15 fps on iPhone 5 during 1st chart scaling, 22 fps on iPhone 6+. For more details read my comments about performance of entry213.

Major: Bars flicker during slow scaling. Looks like this contestant use only integer values for bars. Not only the UX is suffering, but also it gives this contestant a major advantage in performance over other participants.

But still, 14 fps during bar scaling on iPhone 6+