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Testing and Issues

You can test this app and submit issues during the testing period of the Sticker App Contest 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 Quokka Nov 11, 2021 at 17:25
The contest task is completed. The app provides a basic editor for static images, local cache is also supported. However, the submitted entry could have benefited from more thorough preliminary testing and greater attention to detail. While evaluating the app, we discovered the following issues:
– The screen turns black after the first launch.
– Certain emoji are not applied.
– Empty canvas export is allowed.
– The eraser tool experienced performance issues on larger images.

These problems, along with the general impression of the app prevented it from placing higher.

TOTAL: $750
Samsung Galaxy S10 (Android 11); Samsung Galaxy A51 (Android 11); Xiaomi Redmi Note 8 Pro (Android 10).
After installing the application my Android phone started misbehaving and also went black.
Night Lemur Jul 6, 2021 at 10:15
Thank you for your report! I can't replicate this issue (and the other two duplicates below) on any of my devices (OnePlus 6, Pixel 3a, Pixel 4a), so I suspect it has something to do with either slower devices and/or lower Android versions. I don't know why the first launch would be slower than subsequent ones, but I'll look into it.

I have one question for you in particular though - the other two commenters who reported this issue (M Be and Kind Beaver) reported that it only stayed black for a short while, then the app continued working normally. Can you confirm whether this is the case for you too? Again, thank you for testing my app.
Deleted Account Jul 5, 2021 at 23:26
I'm having issues after installing it on my Android. It's showed black than after a while it came back normal. Also he should have added some fun effect to it. Good app though 👍
This application is a good one, the only problem I encountered is also the going black of the screen at the first launch. But after it was opening good. Nice app I gave it a like 👍.
In the emoji text field, I'm not able to enter certain emojis (like this one:
Xiaomi Mi A2 Lite
Night Lemur Jul 7, 2021 at 19:24
Yeah, I noticed this recently too. This is because the emoji is a so-called ZWJ sequence (, which means that it's actually made up of multiple emojis joined together using a Zero Width Joiner, hence the name. In my case I'm checking the unicode codepoint range of each entered character to check whether the entered text only contains emojis, so to fix this I'll simply have to add the ZWJ character to the list of allowed code points, which I'll do in case I decide to publish the app.

Thanks for testing my app though! Maybe the information here can help you fix the bug in your case too.
Sometimes cropping the image doesn't work.
Xiaomi Mi A2 Lite
Night Lemur Jul 7, 2021 at 20:18
This issue seems to be in the image_cropper library I use, so I can't fix it that easily myself without re-implementing the library's functionality. I'll look into filing an issue there or submitting a Pull Request, thanks for the report.

The operation applied here isn't really "cropping", rather "rotating", so the recommended way is to use the "rotating" mode in that screen (middle button) instead of trying to rotate the image while still in "cropping" mode (as in the video), that way it should work.
Nobody added any issues yet...