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Testing and Issues

You can test this app and submit issues during the testing period of the Android Chart contest.

Entries with serious issues will not be able to win the contest, but even minor issues might be important for overall results.


by rating


Fair Mammoth Apr 28, 2019 at 19:30
– Very good speed and performance.

– Bonus goal is completed. However, data filters reset after zooming in and it's not possible to view the latest date (06.04.2019) on the pie chart.

– The third graph jitters when filtering Apples-Pears.
LG Nexus 5X, Android 8.1.0; Samsung Galaxy J7, Android 8.1.0
Giant Fly May 2, 2019 at 10:55
Thank you.
About third graph, it is not a jitter I guess. That effect caused by big animated value, short duration of animation and interpolator I've used (fastoutslowin)
So it simply improvable, by using another combination of anim duration and interpolator, or just make duration depends on distance of animated value
Good speed overall, but slow when filtering 'Apples' in graph #5 (maximum time range). Blinks when switching day/night mode.
Samsung Galaxy S4, Android 5.0.1
Nastya Lisovskaya Apr 19, 2019 at 14:12
Squire line caps, which is against design but increases performance. Some other apps may have a bit worse performance because they decided to follow designs exactly.
Samsung Galaxy A5, Android 7.0
Giant Fly Apr 26, 2019 at 07:55
Yeah it speed up performance. Maybe will be better to use square caps only when animation is running
Nastya Lisovskaya Apr 19, 2019 at 14:16
No white-to-transparent gradient at the top and bottom when graph is animating.
Samsung Galaxy A5, Android 7.0
Nastya Lisovskaya Apr 19, 2019 at 14:17
No selection circle on the yellow chart.
Samsung Galaxy A5, Android 7.0
Giant Fly Apr 26, 2019 at 07:52
Oh my.. Did this bug after refactoring just before submitting application. Fixed it, see video below
Pie issue - when opening 6 April, it displays only 3 days (3,4,5 april), So no 6 aprill at all, also the selected range in the center.
Xiaomi A1 / Android 9
Giant Fly Apr 26, 2019 at 09:01
Thank you for testing;
Fixed it, see video below
Nastya Lisovskaya Apr 19, 2019 at 14:21
Sum is 99%
Samsung Galaxy A5, Android 7.0
Nastya Lisovskaya Apr 19, 2019 at 14:06
1. Sometimes horizontal axis lines count is less then 6 (must be always 6 by design).
2. Rectangle with values must overlap selection line when there is enough space to show both selection circles under the rectangle.
3. No texts animation.
Samsung Galaxy A5, Android 7.0
Hello. I tested your app on 2 real devices. I found some 
1. The pie chart has wrong values/color and very strange animations (screenshot 1/ video1) - only on Innos d6000
2. When I rotate my device I can't see all values on the item label (screenshot 2 - all ok, screenshot 3 - problem)
3. Hard animation to change day/night mode. (video 2) - only on Innos d6000
Innos d6000 (API 22 - android 5.1.1), OUKITEL C5 (Api 24 - android 7.0).
Giant Fly Apr 23, 2019 at 12:41
Seems the problem in your strange device(Innos d6000). All device and emulators that i have are without issues you described
Fearless Cry Apr 20, 2019 at 22:40
Poor performance on chart #3
Mi A2 Lite / Android 9
Fearless Cry Apr 20, 2019 at 22:43
Recreate activity when switch color scheme
Mi A2 Lite / Android 9
Fearless Cry Apr 20, 2019 at 22:52
Date range blinking when scrolling
Mi A2 Lite / Android 9
[+] nice performance. I think that this app should share at least 3rd place with other apps.

1. Small issue. date label at and of the chart does not align the chart end.
Umi Super, Android
2. Date intersect dot is overlapped with line above. See Dreamy Griffin implementation ( (see screenshots - first yours, second - dreamy griffin)
3. Small Issue. Nice readability, but against design - line count is not constant. Always 6 in the video provided by telegram. As you can see from video there could be 3-6 lines. Also, in design bottom/first line always match chart drawing bottom
Umi Super, Android
4. Small issue. While scrolling Y-scaled charts left y values are stable and changing when lines are changing, but right Y values have different logic - they stay on y lines, but their values are changing along with y height adjust animation. At least it looks weird.
Umi Super, Android
5. Changes of date (day of the month, month, year) and y values/percent values in popup dialog and preview date range above chart does not animated.

[+] Nice animate dialog repositioning.
6. Preview zone control. When drag left a conrol edge to min-width then it begins to move the whole preview zone.
It not an issue and could be perceived as a positive feature or a negative feature.
[+] control of left and right zones could be started by touching anywhere to the left or right of available space, respectively
[-] left or right edge control should not (in my opinion) act like moving zone. For this user should touch the center (or somewhere between left and right control zones).

You should rather add pinch-to-zoom feature on preview widget as Dreamy Griffin ( did.
Umi Super, Android.
7. In zoom mode of pie chart, control area does not snap to days (width of preview area could be an, should be 1 day step). See telegram video again.
8. Pie chart flickering
Umi Super, Android
Giant Fly Apr 21, 2019 at 19:39
Thank you for testing. Can't reproduce on my devices.On which android version did you test?
No discrete range selector implemented
Xiaomi A1 / Android 9
Stacked bar issue: when opening zoomed view, there is and timezone offset (especially noticeable for edge days like 6 April, but also noticeable for any other day - range selector not perfectly centered)
Xiaomi A1 / Android 9
Giant Fly Apr 23, 2019 at 06:34
Thank you for looking at my app :) I hope you still like it
Nobody added any issues yet...