Lots of minor issues, but very good speed and bonus goal+

Chart going down without clipping.. But Your animations is super cool.

— Applying filters to the third graph feels laggy (the attached video #1). 
— The app is slow when filtering Apples in the last graph.
— Lower bound values are below the X-axis (the attached screenshot #2).

Little bit strange animation when only Pears are visible.

# All charts
- Y lines can sometimes disappear for good, and nothing brings them back but restarting the app. No concrete scenario, it just happens sometimes. (y_lines_disappeared.MP4)
- Algorithm, which finds optimal Y values and step between them is pretty naive and sometimes leads to underutilized space (empty_spaces.jpeg)
- Leftmost date gets clipped. (clipped_left_date.jpg)
- On small scale there can be only a couple of y lines. (2_y_lines.jpeg)

# Chart 3
- You can select a bar in bar chart that is not on screen. (bar_beyond_screen.MP4)

Is your app a time machine or what?) first opening and right to 1970! Lucky me!

Interval and main chart have different height (see yellow)

No bottom gray separator line in navigation bar

Big chart is not scaled vertically when you turn on/off some filters (small one does though)

Cool app. Two small bugs (see on video)
- When we return from the zoom, the date range remains old
- On percentage chart tooltip - when hiding series, them percent in tooltip are incorrect (73% Apples etc)

Multi-touch not supported in range control selector.

Can't grab and move another side of the selector while first one under the finger.

Yeah, it wasn't any requirements about it, but iPhone was built with multitouch support from the ground and this issue looks not user friendly and wierd. 

Should be “All” instead of “Total” by design

Playing with zoom in/out can cause disappearing of the chart.

>Thanks, I got steps: Turn on Slo-mo mode. Zoom in chart. Tap zoom out. During the animation you should quickly tap on chart, then on details view. As a result - charts are missing.

However, I did it without slo-mo mode. No cheating here.

Dates blink sometimes

On first touch down and moving range selector, it jumps instead of smoothly moving. Its the way UIPanGestureRecognizer works by default, to make it smooth from the beginning you have to pull some tricks.

Fast scrolling looks a bit weird.

Area selector can become so small so it become unusable: it impossible to move it and very hard to drag left or right side

The slider is stuck on the right

Dates on x-axis is wrong

All charts, except percentage, must have exactly 6 horizontal lines

Tooltip blinks and shakes

"A long tap on any data filter should uncheck all other filters"

Not cool that chart is drawn above max y-line. Also big chart can’t be zoomed and scrolled by gestures. But your app is best in this contest. Thumbs up!

percents sum up to 101%

No Y axis?

Sometimes less grid lines than needed by contest.

PS. Nice animation for area zooming! Nice app overall!

Info view not centered to the line.

X labels have wrong positions.

If i understand correctly y scaled graphs, they should not be affected by each other. But you graphs scale when hide one of them.

X labels are not aligned with the chart values

Wrong fonts

Wrong dates on the side of chart and in the title with interval of dates. So wrong interval on chart and in title.

This control should be on screen for zoomed state

View with information aligned wrong. Should be on center if there is enough space for it.

Lines don’t start from zero bottom line

Congratulations! Your performance is the best among all the contestants! 60 fps on iPhone 5 - it is unbelievable. I appreciate your work very much. Still, there are some minor issues.

Does not support iOS 8. Telegram does.

Can't apply new filter until the animation of previous one is finished.

Empty chart is very strange idea

Selection point can go beyond the viewport